Therm to Watt-Hour Converter

Energy Converter

27 units available

Decimals:

From

To

29,307.107017

1 thm = 29,307.107017 Wh

Formula:

Wh = thm × 29,307.1070172222

With your value: 1 thm = 29,307.10701722 Wh

How big is that?

Everyday references on a logarithmic scale, all expressed in therm so you can sanity-check the result.

Heartbeat (1/1.1e+8 your value)9.48e-9 thm

AA battery charge (1/1.1e+4 your value)0.0000948 thm

Slice of bread (1/3.8e+2 your value)0.00265 thm

Daily food intake (1/13 your value)0.0796 thm

Litre of petrol (1/3.1 your value)0.324 thm

Your value1.00 thm

Other Therm to Watt-Hour conversions

2 thm to Wh 3 thm to Wh 4 thm to Wh 5 thm to Wh 6 thm to Wh 7 thm to Wh 8 thm to Wh

Therm to Watt-Hour Conversion Table

Therm (thm)	Watt-Hour (Wh)
0.5	14,653.553509
1	29,307.107017
2	58,614.214034
5	146,535.535086
10	293,071.070172
15	439,606.605258
20	586,142.140344
25	732,677.675431
50	1,465,355.350861
100	2,930,710.701722
250	7,326,776.754306
500	14,653,553.508611
1000	29,307,107.017222

Watt-Hour to Therm Conversion Table

Watt-Hour (Wh)	Therm (thm)
0.5	1.706071e-5
1	3.412142e-5
2	6.824283e-5
5	0.000171
10	0.000341
15	0.000512
20	0.000682
25	0.000853
50	0.001706
100	0.003412
250	0.00853
500	0.017061
1000	0.034121

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Therm (thm)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Watt-Hour (Wh)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Therm to Watt-Hour

To convert from Therm (thm) to Watt-Hour (Wh), multiply the value by 29,307.1070172222.

Formula: Wh = thm × 29,307.1070172222

Reverse: thm = Wh × 0.0000341214

Step-by-Step Example

Start with your value in Therm. For example: 5 thm
Multiply by the conversion factor: 5 x 29,307.1070172222
The result is: 146,535.535086 Wh

About Therm

The therm (thm) is a unit of energy and work. One therm equals 1.055056 × 10^+8 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

About Watt-Hour

The watt-hour (Wh) is a unit of energy and work. One watt-hour equals 3600 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

Frequently Asked Questions

How many Watt-Hour are in 1 Therm?

There are exactly 29,307.1070172222 Watt-Hour in 1 Therm. This means the conversion factor from Therm to Watt-Hour is 29,307.1070172222.

What is the formula to convert Therm to Watt-Hour?

The formula to convert Therm to Watt-Hour is: Wh = thm × 29,307.1070172222. For example, to convert 10 Therm to Watt-Hour, you would multiply 10 by 29,307.1070172222.

What is a Therm?