Skip to content
Billix

Electricity Cost Calculator

Rebuild your electric bill from its parts, or price out a single appliance. Uses the numbers from your own bill.

AvailableNo sign-upNothing is saved or sent
kWh

On your bill as kWh used this period.

¢/kWh

If your bill shows one all-in rate, enter it here.

¢/kWh

Distribution + transmission. Leave blank if included above.

$

Customer or service charge. Blank = $0.

%

Optional. Blank = 0%.

Estimated bill

Enter your usage and rate from your bill to see an estimate. We don’t fill in rates for you, because they vary a lot by utility, plan and season.

How the math works

Monthly bill = usage × (supply rate + delivery rate) + fixed charge, then taxes and percentage fees are applied to that subtotal.

All-in cost per kWh = the estimated total ÷ kWh used. It includes fixed charges, so it’s higher when you use less.

Appliance energy = watts × hours per day × number of units ÷ 1,000 = kWh per day of use. Yearly kWh = that × (days per week ÷ 7) × 365. Monthly = yearly ÷ 12.

1 kilowatt-hour (kWh) is 1,000 watts used for one hour.

Assumptions and limits

  • It’s an estimate. Your real bill can differ because of tiered or time-of-use rates, demand charges, minimum bills, riders, credits and rounding.
  • Taxes are applied to the whole subtotal. Some places tax only part of the bill, or charge flat fees instead.
  • Appliances that cycle on and off (fridges, AC, heaters) rarely draw their full rated watts all the time, so label wattage usually overstates their cost.
  • Yearly appliance figures assume the same use every week of the year.
  • We never fill in a rate for you. Use the rates printed on your bill.

Learn more

  1. 1.Electricity explained: Factors affecting electricity prices. U.S. Energy Information Administration. Checked October 13, 2026.