Wh to Therms Converter

How to convert watt-hours to therms

Formulathm = Wh × 0.00003412956341

Multiply the value in watt-hours by 0.00003412956341. To go the other way, multiply by 29,300.11111 (or divide by 0.00003412956341).

A watt-hour is smaller than a therm: it takes 29,300.11111 watt-hours to make one therm.

Worked examples

1 watt-hour1 Wh × 0.00003412956341 = 0.00003412956341 thm
5 watt-hours5 Wh × 0.00003412956341 = 0.000170647817 thm
10 watt-hours10 Wh × 0.00003412956341 = 0.0003412956341 thm
20 watt-hours20 Wh × 0.00003412956341 = 0.0006825912681 thm
100 watt-hours100 Wh × 0.00003412956341 = 0.003412956341 thm

Watt-hours to therms conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Watt-hours to therms: 0.1–10 Wh
Watt-hours (Wh)	Therms (thm)
0.1 Wh	0.0000034129563 thm
0.25 Wh	0.0000085323909 thm
0.5 Wh	0.000017064782 thm
1 Wh	0.000034129563 thm
2 Wh	0.000068259127 thm
3 Wh	0.00010238869 thm
4 Wh	0.00013651825 thm
5 Wh	0.00017064782 thm
6 Wh	0.00020477738 thm
7 Wh	0.00023890694 thm
8 Wh	0.00027303651 thm
9 Wh	0.00030716607 thm
10 Wh	0.00034129563 thm

Watt-hours to therms: 12–1,000 Wh
Watt-hours (Wh)	Therms (thm)
12 Wh	0.00040955476 thm
15 Wh	0.00051194345 thm
20 Wh	0.00068259127 thm
25 Wh	0.00085323909 thm
30 Wh	0.0010238869 thm
40 Wh	0.0013651825 thm
50 Wh	0.0017064782 thm
75 Wh	0.0025597173 thm
100 Wh	0.0034129563 thm
250 Wh	0.0085323909 thm
500 Wh	0.017064782 thm
1,000 Wh	0.034129563 thm

About the units

Watt-hour (Wh)

One watt sustained for an hour: 3,600 J. Battery capacities are rated in Wh.

Therm (thm)

The US therm is 105,480,400 J, about 100,000 BTU. US gas utilities bill by the therm.

Frequently asked questions

How many therms are in one watt-hour?

There are 0.00003412956341 therms in one watt-hour, and this value is exact by definition.

How do I convert watt-hours to therms?

Multiply the number of watt-hours by 0.00003412956341. For example, 10 Wh × 0.00003412956341 = 0.0003412956341 thm.

How many watt-hours are in one therm?

One therm equals 29,300.11111 watt-hours. That is the reverse factor, 1 ÷ 0.00003412956341.

What is 10 watt-hours in therms?

10 Wh = 0.0003412956341 thm.

Is this Wh to thm converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.