Calculators · kWh cost
kWh cost calculator
A kilowatt-hour (kWh) is the unit electricity is sold in. At your utility's current rate, here's what a kWh — and your usage — actually costs. Pick your utility and we fill in the rate.
per day
$4.18
per month
$127.26
per year
$1525.95
At 14.14¢/kWh, 900 kWh per month costs about $127.26.
Runs entirely in your browser — nothing you type is sent anywhere. Estimates only; your actual bill depends on your usage and includes delivery charges on top of the supply rate.
What 1 kWh costs, utility by utility
Current default-supply rate (the price of one kilowatt-hour), lowest to highest, across the utilities we track.
| Utility | State | Cost of 1 kWh |
|---|---|---|
| ComEd | IL | 10.399¢ |
| Duke Energy Ohio | OH | 10.69¢ |
| AES Ohio | OH | 10.86¢ |
| Ohio Edison (FirstEnergy) | OH | 10.92¢ |
| AEP Ohio | OH | 10.97¢ |
| Toledo Edison (FirstEnergy) | OH | 11.1¢ |
| The Illuminating Company (FirstEnergy) | OH | 11.16¢ |
| Ameren Illinois | IL | 11.326¢ |
| PECO Energy | PA | 11.759¢ |
| West Penn Power (FirstEnergy) | PA | 12.076¢ |
| Delmarva Power | MD | 12.35¢ |
| Potomac Edison | MD | 12.936¢ |
| PPL Electric Utilities | PA | 13.079¢ |
| Penelec (FirstEnergy) | PA | 13.143¢ |
| Pepco (Maryland) | MD | 13.27¢ |
| Penn Power (FirstEnergy) | PA | 13.478¢ |
| Delmarva Power (Delaware) | DE | 13.69¢ |
| Met-Ed (FirstEnergy) | PA | 13.954¢ |
| Duquesne Light | PA | 14.14¢ |
| Baltimore Gas & Electric (BGE) | MD | 14.609¢ |
| Jersey Central Power & Light (JCP&L) | NJ | 15.2472¢ |
| Atlantic City Electric | NJ | 17.6¢ |
| Pepco (D.C.) | DC | 17.63¢ |
| PSE&G | NJ | 19.0735¢ |
Supply rate only; delivery charges are extra. Rates reset on each utility's schedule — confirm the current figure on your bill.
Common questions
- How much does 1 kWh of electricity cost?
- A kilowatt-hour is the unit your electricity is billed in. The supply price ranges widely by utility — across the states we track, currently from about 10.399¢ to 19.0735¢ per kWh. Pick your utility above for its exact current rate.
- How much is a kilowatt-hour in watts?
- 1 kWh = 1,000 watts running for 1 hour. So a 100-watt bulb left on for 10 hours uses 1 kWh; a 1,500-watt space heater uses 1 kWh in 40 minutes.
- Is the kWh rate the whole story?
- No. The per-kWh supply rate is what this shows, but your bill also has delivery (distribution) charges and fixed monthly fees. The supply rate is the part you can sometimes shop in choice states.