Convert energy units — joules, kilowatt-hours, calories, BTU, electron volts and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 kWh | 3.41296e-05 therm | |
| 0.01 kWh | 0.000341296 therm | |
| 0.1 kWh | 0.00341296 therm | |
| 1 kWh | 0.0341296 therm | |
| 5 kWh | 0.170648 therm | |
| 10 kWh | 0.341296 therm | |
| 50 kWh | 1.70648 therm | |
| 100 kWh | 3.41296 therm | |
| 1000 kWh | 34.1296 therm |
Formula: Therm = Kilowatt-Hour × 0.03413
Multiply any kilowatt-hour value by 0.03413 to get therm.
Reverse: Kilowatt-Hour = Therm × 29.3
Common kilowatt-hour values — factor: 1 kWh = 0.03413 therm
| Kilowatt-Hour (kWh) | Therm (therm) | Context |
|---|---|---|
| 0.001 kWh | 3.413e-05 therm | 1 Wh |
| 0.01 kWh | 0.0003413 therm | 10 Wh |
| 0.1 kWh | 0.003413 therm | Phone charge |
| 0.5 kWh | 0.01706 therm | Half kWh |
| 1 kWh | 0.03413 therm | 1 kWh |
| 5 kWh | 0.1706 therm | 5 kWh |
| 10 kWh | 0.3413 therm | Washing machine |
| 30 kWh | 1.024 therm | Daily home use |
| 100 kWh | 3.413 therm | Monthly fraction |
| 500 kWh | 17.06 therm | EV range |
| 1,000 kWh | 34.13 therm | Monthly home |
| 1e+04 kWh | 341.3 therm | Annual home |
| 1e+05 kWh | 3,413 therm | Large commercial |
| 1e+06 kWh | 3.413e+04 therm | Small factory |
| 1.000e+09 kWh | 3.413e+07 therm | Power plant day |
kWh ÷ 29.307 = therms. Round to ÷ 29.3.
Memorize: about 29 kWh per therm of gas.
therms × 29.307 = kWh.
Reads monthly bills and compares appliance energy use in kWh.
Sizes solar systems based on kWh consumption and production estimates.
Tracks charging cost and range efficiency in kWh per 100 km.
Measures building energy consumption and identifies savings in kWh.
Plans grid capacity, demand response, and billing in kWh and MWh.
Monitors real-time appliance consumption in kWh via smart meters.
The kilowatt-hour (kWh) is the commercial unit of electrical energy, equal to the energy consumed by a 1,000-watt appliance in one hour (3,600,000 joules). It became standard with the growth of the electrical grid in the late 19th century.
Electricity bills worldwide are denominated in kWh. A typical household uses 300–1,000 kWh per month. An electric car uses about 15–25 kWh per 100 km. Solar panels generate 250–400 kWh per year per panel.
Interesting fact: The average price of electricity in the US is about $0.12 per kWh. One kWh can run a 100W light bulb for 10 hours, charge a smartphone about 100 times, or power a laptop for 2-3 days.
The therm is a unit of natural gas energy equal to 100,000 BTU (105,480,400 joules). It is the standard billing unit for natural gas in the United States and United Kingdom. The name comes from the Greek thermos (heat).
Gas utilities bill residential and commercial customers in therms in the US and UK. A typical US household uses about 50–100 therms per month in winter. Natural gas furnaces and water heaters are rated in therms per hour.
Interesting fact: One therm of natural gas costs about $1.00–$2.00 in the US. Burning one therm releases about 5.3 kg of CO₂. The US consumes about 28 trillion therms of natural gas equivalent energy per year.
Converting kilowatt-hour to therm is common across energy, nutrition, engineering, and science. Different sectors use different energy units — joules in physics, kcal in nutrition, kWh in electricity, and BTU in HVAC — making accurate conversion essential for cross-disciplinary work and international comparisons.
Quick reference: 5 kWh = 0.1706 therm and 10 kWh = 0.3413 therm. Reverse: 1 therm = 29.3 kWh. Exact factor: 1 kWh = 0.03413 therm.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.