How to convert kilowatt-hours to therms
Formula: thm = kWh × 0.0341214
Worked example: 100 kWh → 100 × 0.0341214 = 3.41214 thm
One therm is about 29.3 kWh. To compare gas and electricity prices, divide the price per therm by 29.3: gas at $1.50 a therm costs about $0.051 per kWh of heat, before furnace efficiency.
Kilowatt-hours to therms conversion chart
| Kilowatt-hours (kWh) | Therms (thm) |
|---|---|
| 1 kWh | 0.0341214 thm |
| 2 kWh | 0.0682428 thm |
| 3 kWh | 0.102364 thm |
| 4 kWh | 0.136486 thm |
| 5 kWh | 0.170607 thm |
| 6 kWh | 0.204728 thm |
| 7 kWh | 0.23885 thm |
| 8 kWh | 0.272971 thm |
| 9 kWh | 0.307093 thm |
| 10 kWh | 0.341214 thm |
| 12 kWh | 0.409457 thm |
| 15 kWh | 0.511821 thm |
| 20 kWh | 0.682428 thm |
| 25 kWh | 0.853035 thm |
| 30 kWh | 1.02364 thm |
| 40 kWh | 1.36486 thm |
| 50 kWh | 1.70607 thm |
| 75 kWh | 2.55911 thm |
| 100 kWh | 3.41214 thm |
| 250 kWh | 8.53035 thm |
| 500 kWh | 17.0607 thm |
| 1,000 kWh | 34.1214 thm |
What is a kilowatt-hour?
The kilowatt-hour equals 1,000 watt-hours, or 3.6 megajoules. It is the unit on every electricity bill and for electric car batteries: a 2,000 W heater running for 3 hours uses 6 kWh.
What is a therm?
The therm equals 100,000 BTU, about 29.3 kilowatt-hours. US and UK natural gas bills often charge per therm. The US therm used by some utilities differs from this value by only 0.02%.