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Therms to Watt-hours Converter

Convert therms (100,000 Btu) (thm) to watt-hours (Wh), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an amount of energy, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
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Result
29,307.1070172 Wh
joules (watt-seconds)
105,505,585.262 J
kilojoules
105,505.585262 kJ
megajoules
105.505585262 MJ
gigajoules
0.105505585262 GJ
calories (thermochemical)
25,216,440.0722 cal
kilocalories (food Calories)
25,216.4400722 kcal
megacalories
25.2164400722 Mcal
kilowatt-hours
29.3071070172 kWh
megawatt-hours
0.0293071070172 MWh
British thermal units (IT)
100,000 Btu
million Btu
0.1 MMBtu
quads (10¹⁵ Btu)
1 × 10⁻¹⁰ quad
electronvolts
6.58514067819 × 10²⁶ eV
kiloelectronvolts
6.58514067819 × 10²³ keV
megaelectronvolts
6.58514067819 × 10²⁰ MeV

1 thm = 29,307.1070172 Wh

Show the working
  1. 1 thm = 29307.1070172 Wh
  2. 1 × 29307.1070172 = 29307.1070172 Wh

How to convert therms to watt-hours

1 thm = 29,307.1070172 Wh, so multiply by 29,307.1070172 to go from therms (100,000 Btu) to watt-hours. Going the other way, 1 Wh = 3.41214163313 × 10⁻⁵ thm.

Wh = thm × 29,307.1070172
thm = Wh × 3.41214163313

Worked example:

1 thm = 29307.1070172 Wh
5 × 29307.1070172 = 146535.535086 Wh

Therms to watt-hours table

ThermsWatt-hours
1 thm29,307.1070172 Wh
2 thm58,614.2140344 Wh
3 thm87,921.3210517 Wh
4 thm117,228.428069 Wh
5 thm146,535.535086 Wh
6 thm175,842.642103 Wh
7 thm205,149.749121 Wh
8 thm234,456.856138 Wh
9 thm263,763.963155 Wh
10 thm293,071.070172 Wh
15 thm439,606.605258 Wh
20 thm586,142.140344 Wh
25 thm732,677.675431 Wh
30 thm879,213.210517 Wh
40 thm1,172,284.28069 Wh
50 thm1,465,355.35086 Wh
75 thm2,198,033.02629 Wh
100 thm2,930,710.70172 Wh
250 thm7,326,776.75431 Wh
500 thm14,653,553.5086 Wh
1000 thm29,307,107.0172 Wh

About the units

Therms (thm)
Therms (100,000 Btu), a US customary unit. The EC/IT therm; the US therm is 105,480,400 J, 0.02% smaller. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.

Formula version 0.1.0Reviewed