Watt Hour to British Thermal Unit Converter
Energy · unit-converter
Convert Watt Hour to British Thermal Unit with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Watt Hour (wh)
To: British Thermal Unit (btu)
About Watt Hour
One watt-hour is 3,600 J—the energy from 1 W for one hour. Common for small batteries and device ratings.
About British Thermal Unit
The British thermal unit used here is the IT BTU: ≈ 1,055.056 J. It appears in HVAC, heating equipment, and US engineering data.
How to convert watt hours to british thermal units
1 watt hour is equal to 3.41214163312794 british thermal unit when both are expressed in joule-equivalents:
1 wh = (3,600 J ÷ 1,055.05585262 J) btu = 3.41214163312794 btu
Each watt hour is defined as 3,600 J and each british thermal unit as 1,055.05585262 J in this tool, so one wh equals 3,600 ÷ 1,055.05585262 btu = 3.41214163312794 btu.
Let d(wh) be the numeric amount in Watt Hour (wh), and d(btu) the amount in British Thermal Unit (btu). Then:
d(btu) = d(wh) × (3,600 / 1,055.05585262)
Equivalently, divide by how many wh fit into one btu (joules per btu divided by joules per wh):
d(btu) = d(wh) ÷ 0.29307107017222
Or: british thermal unit = watt hour ÷ 0.29307107017222
Examples
Example #1: Convert 1 wh to british thermal unit
1 wh = 1 wh × (3,600/1,055.05585262) btu = 3.4121416331 btu
1 wh = 1 wh ÷ 0.29307107017222 = 3.4121416331 btu
Example #2: Convert 10 wh to british thermal unit
10 wh = 10 wh × (3,600/1,055.05585262) btu = 34.1214163313 btu
10 wh = 10 wh ÷ 0.29307107017222 = 34.1214163313 btu
Summary
To convert Watt Hour to British Thermal Unit, multiply the value in wh by the ratio of joules per wh divided by joules per btu. Equivalently: value_btu = value_wh × (3600 / 1055.05585262). Numerically, 1 wh equals 3.4121416331279417 btu.
Relationship context
You are converting between electrical energy (watt-hours) (Watt Hours) and US / imperial engineering units (BTU, therm, ft·lb) (British Thermal Units). All values are mapped through joules first. The numeric factor is 3.412142e+0.
Conversion tables
| Watt Hour (wh) | British Thermal Unit (btu) |
|---|---|
| 0.1 | 0.3412141633 |
| 1 | 3.4121416331 |
| 2 | 6.8242832663 |
| 3 | 10.2364248994 |
| 4 | 13.6485665325 |
| 5 | 17.0607081656 |
| 6 | 20.4728497988 |
| 7 | 23.8849914319 |
| 8 | 27.297133065 |
| 9 | 30.7092746982 |
| Watt Hour (wh) | British Thermal Unit (btu) |
|---|---|
| 10 | 34.1214163313 |
| 20 | 68.2428326626 |
| 30 | 102.364248994 |
| 40 | 136.485665325 |
| 50 | 170.607081656 |
| 60 | 204.728497988 |
| 70 | 238.849914319 |
| 80 | 272.97133065 |
| 90 | 307.092746982 |
| 100 | 341.214163313 |