Electric bill tools
Three calculators that run in your browser. Nothing you type is sent anywhere. Each starts from EIA state averages of 11.81 to 40.59 cents per kWh and lets you replace them with the numbers on your own bill.
Pick a tool
- Bill decoder. Enter the total and the kWh from one bill. See your all-in price per kWh, how it compares with your state, and what the fixed charge costs you.
- Bill decoder by utility tariff. Pick one of 111 utilities, type the kWh and total from your bill, and see the published tariff price, each line explained and what looks off.
- True cost of power. Add your fixed charge and rate to see what one more kWh, or one appliance, adds to your bill.
- Rate-plan fit. Compare a flat plan with a time-of-use plan and find the share of peak use where they cost the same.
How the tools work
Each page shows its formulas. The averages come from EIA's annual state tables and the Texas wires numbers from the EIA-861 file; every input can be overwritten. Results are estimates from the numbers you give, so a plan with demand charges, tiers or seasonal rates will not match to the cent.
| Tool | You enter | You get |
|---|---|---|
| Bill decoder | Total, kWh, fixed charge | All-in cents per kWh, gap to state |
| True cost | Rate, fixed charge, appliance | Cost per month and per year |
| Rate-plan fit | Two sets of rates, peak share | Cheaper plan, break-even share |
Sources
- Home price and use by state: U.S. EIA state electricity data, annual 2025; CSV: state-price-and-use-2025.csv.
- Delivery-company and dynamic-pricing counts: EIA-861, 2024 data year.
Keep going
Questions
Do these calculators store what I type?
No. They run in your browser and nothing is sent to a server.
Where do the state averages come from?
From EIA annual state electricity data for 2025, home sector. They are averages across all home customers, not a quote for your address.
Which tool should I start with?
Start with the bill decoder if you have a recent bill in hand. Use the rate-plan fit when your utility offers a time-of-use plan.