About Us

WattCostCalc is a free set of electricity cost calculators. We answer one question: how much does it cost to run this appliance?

Every page shows a quick answer, a calculator you can change, and the working behind the numbers. We do not use AI to do the maths. The formula is fixed and tested before pages go live.

Who it is for

Anyone checking a heater before winter, an air conditioner before summer, or a bill that looks too high.

Questions or corrections? Contact us.