20 kWh to thm — 20 kilowatt-hours in therms
Exact 20 ÷ 29.307107 = 0.68242833
20 kilowatt-hours in other units
| Joules | 72,000,000 | J |
|---|---|---|
| Kilojoules | 72,000 | kJ |
| Megajoules | 72 | MJ |
| Watt-hours | 20,000 | Wh |
| Calories | 17,208,413 | cal |
| Kilocalories | 17,208.41 | kcal |
| British thermal units | 68,242.83 | BTU |
| Therms | 0.68242833 | thm |
| Foot-pounds | 53,104,474.75 | ft·lbf |
| Electronvolts | 449,388,653,361,174,937,750,994,944 | eV |
kWh to thm at a glance
| Kilowatt-hours | Therms |
|---|---|
| 1 kWh | 0.03412142 thm |
| 2 kWh | 0.06824283 thm |
| 3 kWh | 0.10236425 thm |
| 5 kWh | 0.17060708 thm |
| 10 kWh | 0.34121416 thm |
| 20 kWh | 0.68242833 thm |
| 25 kWh | 0.85303541 thm |
| 50 kWh | 1.706071 thm |
| 100 kWh | 3.412142 thm |
| 250 kWh | 8.530354 thm |
| 500 kWh | 17.060708 thm |
| 1,000 kWh | 34.121416 thm |
How to convert kilowatt-hours to therms
Multiply by 0.03412142 — one kilowatt-hour is 0.03412142 therms. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 20 ÷ 29.307107 = 0.68242833
What these units are
The kilowatt-hour and the therm are covered in the energy unit guide, along with every other unit on this page.
Questions
How many therms are in a kilowatt-hour?
One kilowatt-hour is 0.03412142 therms. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 20 kilowatt-hours in therms?
20 kilowatt-hours is 0.68242833 therms. The working is 20 ÷ 29.307107 = 0.68242833.
Is a food Calorie the same as a calorie?
No — it is a thousand of them. The Calorie on a nutrition label is a kilocalorie, written with a capital C in principle and almost never in practice. A 250 Calorie chocolate bar holds 250,000 physics calories, or about 1,046 kilojoules, which is why European labels quote kJ alongside.
What does a kilowatt-hour actually represent?
One kilowatt drawn for one hour — a 1,000 W heater running for sixty minutes, or a 100 W bulb for ten hours. It is the unit your electricity bill is priced in, and it equals exactly 3.6 million joules.
How much energy is one BTU?
Roughly the heat needed to raise one pound of water by one degree Fahrenheit — about 1,055 joules, or the energy in a single kitchen match. Air conditioners are rated in BTU per hour, where a 12,000 BTU/h unit is one "ton" of cooling and draws around 3.5 kW of heat.
Why is the electronvolt so small?
Because it is sized for single particles: it is the energy one electron picks up crossing a one-volt potential difference. At about 1.6 × 10⁻¹⁹ joules it would be absurd for anything larger, which is precisely why particle physics uses it instead of dragging around twenty leading zeros.