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Electricity Bill Calculator

Use this electricity bill calculator to estimate your monthly electric bill from your major loads. Enter the kWh your heating/cooling, water heating, EV charging, and everything else use each month, set your rate and fixed charge, and see your monthly and yearly bill plus a breakdown of what drives it: pick your state to fill the rate automatically.

Estimated bill

$210/mo

Total usage
1,200 kWh/mo
Yearly bill
$2,517

What drives the bill

  • Heating & cooling$65.92 33%
  • Water heating$41.20 21%
  • EV charging$49.44 25%
  • Appliances, lighting & other$41.20 21%
  • Fixed charge$12.00

Estimate from your major loads. The rate and fixed charge are printed on your bill: heating/cooling and water heating usually dominate, so start there for the biggest impact.

Find what drives your bill

The estimate above is built from typical appliance figures. A plug-in energy meter measures one corded 120 V appliance; a whole-home monitor's sensors clip on inside the panel and log every circuit.

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Energy meter and monitor picks

Frequently asked questions

Add up the kWh your home uses each month, multiply by your electricity rate in dollars per kWh, then add the fixed monthly service charge. This calculator splits usage into major categories (heating and cooling, water heating, EV charging, and everything else), so you can see the total and what's driving it. Heating, cooling, and water heating typically make up the largest share.

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WattSimple. (2026, June 26). Electricity Bill Calculator. https://wattsimple.com/calculators/electricity-bill-estimator

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Sources & standards

This tool's methodology and data follow US standards and authoritative public datasets: