WattwiseHome energy, made clear
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Your location gives the calculator sensible defaults. Only change an extra setting when it differs from your actual bill.

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Understand your inputs

Clear guides for a less confusing electricity bill.

Short, practical explanations of appliance wattage, kWh, tariff slabs, measuring energy, and making fair comparisons.

01Measurement guide

How to find an appliance’s real wattage

Use the label, energy guide, manual, or a plug-in meter—and know when each source can mislead you.

Includes a marked AC label example6 min read02Electricity basics

Watts, kilowatts, and kWh—without the jargon

Power is the speed of energy use; kWh is the amount you pay for. Here is how to move between them confidently.

5 min read03Tariff guide

How tiered electricity tariffs change appliance cost

Understand slabs, marginal rates, fixed charges, subsidies, and why your last unit can cost more than your first.

8 min read