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Choose the right model

Electricity cost calculators for every room.

Start with a typical estimate in seconds. Replace it with a measured or label value whenever you have one, and Wattwise will update the confidence.

Cooling

2 calculators
AC

Air conditioner

Estimate inverter or fixed-speed AC cost using input power, compressor duty cycle, daily runtime, seasonal months, and your electricity tariff.

Typical range: 0.8–2.4 kWh per operating hour
CF

Ceiling fan

Compare conventional and BLDC ceiling fans using speed-adjusted power, nightly runtime, quantity, and seasonal months.

Typical range: 25–90 watts while running

Cooling and ventilation

14 calculators
CA

Central air conditioner

Estimate central air conditioner electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 1,575–6,300 watts typical input
SA

Split air conditioner

Estimate split air conditioner electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 675–2,700 watts typical input
WA

Window air conditioner

Estimate window air conditioner electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 540–2,160 watts typical input
PA

Portable air conditioner

Estimate portable air conditioner electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 585–2,340 watts typical input
IA

Inverter air conditioner

Estimate inverter air conditioner electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 495–1,980 watts typical input
EA

Evaporative air cooler

Estimate evaporative air cooler electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 81–324 watts typical input
PF

Pedestal fan

Estimate pedestal fan electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 23–90 watts typical input
TF

Tower fan

Estimate tower fan electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 20–81 watts typical input
EF

Exhaust fan

Estimate exhaust fan electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 16–63 watts typical input
WF

Whole-house fan

Estimate whole-house fan electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 203–810 watts typical input
D

Dehumidifier

Estimate dehumidifier electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 203–810 watts typical input
AP

Air purifier

Estimate air purifier electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 20–81 watts typical input
HV

Heat-recovery ventilation

Estimate heat-recovery ventilation electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 50–198 watts typical input
PC

Portable cooler

Estimate portable cooler electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 41–162 watts typical input

Heating

1 calculator
RH

Room heater

Calculate fan-heater, oil-filled radiator, convector, infrared, or heat-pump running cost with thermostat cycling and winter usage.

Typical range: 0.4–2.5 kWh per operating hour

Heating and hot water

16 calculators
ES

Electric space heater

Estimate electric space heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 675–2,700 watts typical input
FH

Fan heater

Estimate fan heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 900–3,600 watts typical input
OR

Oil-filled radiator

Estimate oil-filled radiator electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 675–2,700 watts typical input
CH

Convector heater

Estimate convector heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 900–3,600 watts typical input
IH

Infrared heater

Estimate infrared heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 450–1,800 watts typical input
BH

Baseboard heater

Estimate baseboard heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 675–2,700 watts typical input
SH

Storage heater

Estimate storage heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 1,530–6,120 watts typical input
HP

Heat pump

Estimate heat pump electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 990–3,960 watts typical input
EB

Electric blanket

Estimate electric blanket electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 36–144 watts typical input
UH

Underfloor heating

Estimate underfloor heating electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 810–3,240 watts typical input
SW

Storage water heater

Estimate storage water heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 1,350–5,400 watts typical input
TW

Tankless water heater

Estimate tankless water heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 3,375–13,500 watts typical input
ES

Electric shower

Estimate electric shower electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 3,825–15,300 watts typical input
IH

Immersion heater

Estimate immersion heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 1,350–5,400 watts typical input
HW

Heat-pump water heater

Estimate heat-pump water heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 405–1,620 watts typical input
HT

Heated towel rail

Estimate heated towel rail electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 68–270 watts typical input

Kitchen

23 calculators
RF

Refrigerator

Turn an annual energy-label value into daily, monthly, and yearly cost, then compare an older or second refrigerator.

Typical range: 150–650 kWh per year
AF

Air fryer

Calculate cost per cooking session and compare shorter, smaller-chamber air-fryer use with a full-size electric oven.

Typical range: 0.25–1.1 kWh per cooking session
EO

Electric oven

Estimate preheat and thermostat-cycled cooking cost, then compare a smaller air fryer for suitable meals.

Typical range: 1.2–3.5 kWh per cooking session
D

Dishwasher

Estimate dishwasher electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 675–2,700 watts typical input
CO

Convection oven

Estimate convection oven electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 1,080–4,320 watts typical input
M

Microwave

Estimate microwave electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 540–2,160 watts typical input
EC

Electric cooktop

Estimate electric cooktop electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 990–3,960 watts typical input
IC

Induction cooktop

Estimate induction cooktop electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 810–3,240 watts typical input
ES

Electric stove

Estimate electric stove electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 1,575–6,300 watts typical input
RC

Rice cooker

Estimate rice cooker electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 315–1,260 watts typical input
EK

Electric kettle

Estimate electric kettle electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 990–3,960 watts typical input
CM

Coffee maker

Estimate coffee maker electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 450–1,800 watts typical input
EM

Espresso machine

Estimate espresso machine electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 653–2,610 watts typical input
T

Toaster

Estimate toaster electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 405–1,620 watts typical input
SC

Slow cooker

Estimate slow cooker electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 99–396 watts typical input
PC

Pressure cooker

Estimate pressure cooker electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 450–1,800 watts typical input
FP

Food processor

Estimate food processor electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 315–1,260 watts typical input
B

Blender

Estimate blender electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 225–900 watts typical input
M

Mixer/grinder

Estimate mixer/grinder electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 338–1,350 watts typical input
RH

Range hood

Estimate range hood electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 81–324 watts typical input
WP

Water purifier

Estimate water purifier electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 16–63 watts typical input
WD

Water dispenser

Estimate water dispenser electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 225–900 watts typical input
IM

Ice maker

Estimate ice maker electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 68–270 watts typical input

Laundry

11 calculators
WM

Washing machine

Estimate electricity and water cost per load for front-load, top-load, semi-automatic, eco, cold, and heated wash programs.

Typical range: 0.35–1.5 kWh per cycle
FW

Front-load washing machine

Estimate front-load washing machine electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 225–900 watts typical input
TW

Top-load washing machine

Estimate top-load washing machine electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 270–1,080 watts typical input
SW

Semi-automatic washing machine

Estimate semi-automatic washing machine electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 180–720 watts typical input
CW

Compact washer

Estimate compact washer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 203–810 watts typical input
WC

Washer-dryer combination

Estimate washer-dryer combination electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 990–3,960 watts typical input
VD

Vented dryer

Estimate vented dryer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 1,350–5,400 watts typical input
CD

Condenser dryer

Estimate condenser dryer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 1,125–4,500 watts typical input
HD

Heat-pump dryer

Estimate heat-pump dryer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 405–1,620 watts typical input
CI

Clothes iron

Estimate clothes iron electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 630–2,520 watts typical input
GS

Garment steamer

Estimate garment steamer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 675–2,700 watts typical input

Water heating

1 calculator
WH

Water heater

Model the energy needed to heat a known volume of water, including efficiency, temperature rise, standing loss, and daily use.

Typical range: 1.2–5.5 kWh per household day

Refrigeration

9 calculators
R

Refrigerator-freezer

Estimate refrigerator-freezer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 81–324 watts typical input
SR

Side-by-side refrigerator

Estimate side-by-side refrigerator electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 99–396 watts typical input
FR

French-door refrigerator

Estimate french-door refrigerator electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 108–432 watts typical input
CF

Chest freezer

Estimate chest freezer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 54–216 watts typical input
UF

Upright freezer

Estimate upright freezer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 77–306 watts typical input
MR

Mini refrigerator

Estimate mini refrigerator electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 36–144 watts typical input
WC

Wine cooler

Estimate wine cooler electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 45–180 watts typical input
BR

Beverage refrigerator

Estimate beverage refrigerator electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 50–198 watts typical input
SR

Second refrigerator

Estimate second refrigerator electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 86–342 watts typical input

Entertainment

11 calculators
TV

Television

Estimate active viewing and standby cost by screen power, daily hours, quantity, and always-on accessories.

Typical range: 45–220 watts while viewing
LT

LED television

Estimate led television electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 38–153 watts typical input
OT

OLED television

Estimate oled television electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 59–234 watts typical input
PT

Plasma television

Estimate plasma television electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 117–468 watts typical input
P

Projector

Estimate projector electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 135–540 watts typical input
S

Soundbar

Estimate soundbar electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 16–63 watts typical input
HS

Home-theatre system

Estimate home-theatre system electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 113–450 watts typical input
SB

Set-top box

Estimate set-top box electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 7–27 watts typical input
SD

Streaming device

Estimate streaming device electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 3–11 watts typical input
GC

Gaming console

Estimate gaming console electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 81–324 watts typical input
VH

Virtual-reality headset

Estimate virtual-reality headset electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 11–45 watts typical input

Computing and communications

14 calculators
DC

Desktop computer

Estimate desktop computer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 81–324 watts typical input
GC

Gaming computer

Estimate gaming computer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 248–990 watts typical input
L

Laptop

Estimate laptop electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 29–117 watts typical input
M

Monitor

Estimate monitor electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 14–54 watts typical input
P

Printer

Estimate printer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 18–72 watts typical input
WR

Wi-Fi router

Estimate wi-fi router electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 5–22 watts typical input
MW

Mesh Wi-Fi node

Estimate mesh wi-fi node electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 5–18 watts typical input
NS

Network-attached storage

Estimate network-attached storage electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 16–63 watts typical input
M

Modem

Estimate modem electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 5–18 watts typical input
SS

Smart speaker

Estimate smart speaker electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 2–9 watts typical input
PC

Phone charger

Estimate phone charger electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 5–22 watts typical input
TC

Tablet charger

Estimate tablet charger electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 9–36 watts typical input
SC

Security camera

Estimate security camera electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 4–14 watts typical input
CR

CCTV recorder

Estimate cctv recorder electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 11–45 watts typical input

Lighting

9 calculators
LB

LED bulb

Estimate led bulb electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 4–16 watts typical input
CB

CFL bulb

Estimate cfl bulb electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 8–32 watts typical input
FT

Fluorescent tube

Estimate fluorescent tube electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 16–65 watts typical input
HB

Halogen bulb

Estimate halogen bulb electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 23–90 watts typical input
IB

Incandescent bulb

Estimate incandescent bulb electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 27–108 watts typical input
SB

Smart bulb

Estimate smart bulb electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 5–18 watts typical input
OS

Outdoor security light

Estimate outdoor security light electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 14–54 watts typical input
DL

Decorative lighting

Estimate decorative lighting electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 36–144 watts typical input
GL

Garden lighting

Estimate garden lighting electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 27–108 watts typical input

Household and cleaning

9 calculators
VC

Vacuum cleaner

Estimate vacuum cleaner electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 405–1,620 watts typical input
RV

Robot vacuum

Estimate robot vacuum electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 20–81 watts typical input
SC

Steam cleaner

Estimate steam cleaner electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 675–2,700 watts typical input
PW

Pressure washer

Estimate pressure washer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 810–3,240 watts typical input
HD

Hair dryer

Estimate hair dryer electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 720–2,880 watts typical input
HS

Hair straightener

Estimate hair straightener electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 36–144 watts typical input
ET

Electric toothbrush

Estimate electric toothbrush electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 1–4 watts typical input
SM

Sewing machine

Estimate sewing machine electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 41–162 watts typical input
H

Humidifier

Estimate humidifier electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 16–63 watts typical input

Pumps and outdoor equipment

12 calculators
WP

Water pump

Estimate water pump electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 338–1,350 watts typical input
WP

Well pump

Estimate well pump electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 495–1,980 watts typical input
BP

Booster pump

Estimate booster pump electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 225–900 watts typical input
SP

Sump pump

Estimate sump pump electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 293–1,170 watts typical input
PP

Pool pump

Estimate pool pump electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 495–1,980 watts typical input
PH

Pool heater

Estimate pool heater electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 2,250–9,000 watts typical input
HT

Hot tub

Estimate hot tub electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 1,800–7,200 watts typical input
S

Sauna

Estimate sauna electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 2,700–10,800 watts typical input
GP

Garden pump

Estimate garden pump electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 270–1,080 watts typical input
EL

Electric lawn mower

Estimate electric lawn mower electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 630–2,520 watts typical input
GO

Garage-door opener

Estimate garage-door opener electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 225–900 watts typical input
EG

Electric gate

Estimate electric gate electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 180–720 watts typical input

Energy and transportation

8 calculators
UP

Uninterruptible power supply

Estimate uninterruptible power supply electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 16–63 watts typical input
HI

Home inverter

Estimate home inverter electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 20–81 watts typical input
BC

Battery charger

Estimate battery charger electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 113–450 watts typical input
EV

Electric vehicle charger

Estimate electric vehicle charger electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 3,240–12,960 watts typical input
EB

Electric bicycle charger

Estimate electric bicycle charger electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 135–540 watts typical input
ES

Electric scooter charger

Estimate electric scooter charger electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 81–324 watts typical input
SI

Solar inverter

Estimate solar inverter electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 11–45 watts typical input
HB

Home battery system

Estimate home battery system electricity use with a globally available preset, then replace it with the power or energy-label value for your model.

Typical range: 18–72 watts typical input

Always on

1 calculator
SB

Standby power

Add always-on devices to estimate total standby watts, monthly cost, avoidable annual cost, and smart-plug payback.

Typical range: 20–120 watts for a whole home