Energy

Wh to BTU Converter

Convert watt-hours (Wh) to British thermal units (BTU). 1 watt-hour = 3.412141633 British thermal units (exact)

1 watt-hour = 3.41214163313 British thermal units

How to convert watt-hours to British thermal units

FormulaBTU = Wh × 3.412141633

Multiply the value in watt-hours by 3.412141633. To go the other way, multiply by 0.2930710702 (or divide by 3.412141633).

A watt-hour is larger than a British thermal unit: one watt-hour contains 3.412141633 British thermal units.

Worked examples

  • 1 watt-hour1 Wh × 3.412141633 = 3.412141633 BTU
  • 5 watt-hours5 Wh × 3.412141633 = 17.06070817 BTU
  • 10 watt-hours10 Wh × 3.412141633 = 34.12141633 BTU
  • 20 watt-hours20 Wh × 3.412141633 = 68.24283266 BTU
  • 100 watt-hours100 Wh × 3.412141633 = 341.2141633 BTU

Watt-hours to British thermal units conversion table

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

Watt-hours to British thermal units: 0.1–10 Wh
Watt-hours (Wh)British thermal units (BTU)
0.1 Wh0.34121416 BTU
0.25 Wh0.85303541 BTU
0.5 Wh1.7060708 BTU
1 Wh3.4121416 BTU
2 Wh6.8242833 BTU
3 Wh10.236425 BTU
4 Wh13.648567 BTU
5 Wh17.060708 BTU
6 Wh20.47285 BTU
7 Wh23.884991 BTU
8 Wh27.297133 BTU
9 Wh30.709275 BTU
10 Wh34.121416 BTU
Watt-hours to British thermal units: 12–1,000 Wh
Watt-hours (Wh)British thermal units (BTU)
12 Wh40.9457 BTU
15 Wh51.182124 BTU
20 Wh68.242833 BTU
25 Wh85.303541 BTU
30 Wh102.36425 BTU
40 Wh136.48567 BTU
50 Wh170.60708 BTU
75 Wh255.91062 BTU
100 Wh341.21416 BTU
250 Wh853.03541 BTU
500 Wh1,706.0708 BTU
1,000 Wh3,412.1416 BTU

About the units

Watt-hour (Wh)

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

British thermal unit (BTU)

The International Table BTU, 1,055.05585262 J — roughly the energy to heat one pound of water by 1 °F. Furnace and AC capacities are rated in BTU (per hour). One British thermal unit equals 1,055.055853 joules (J).

Frequently asked questions

How many British thermal units are in one watt-hour?

There are 3.412141633 British thermal units in one watt-hour, and this value is exact by definition.

How do I convert watt-hours to British thermal units?

Multiply the number of watt-hours by 3.412141633. For example, 10 Wh × 3.412141633 = 34.12141633 BTU.

How many watt-hours are in one British thermal unit?

One British thermal unit equals 0.2930710702 watt-hours. That is the reverse factor, 1 ÷ 3.412141633.

What is 10 watt-hours in British thermal units?

10 Wh = 34.12141633 BTU.

Is this Wh to BTU 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.

Convert watt-hours to other units

Convert other units to British thermal units

Try “psi to bar”, “cups”, “binary” or “5 ft in cm”.