British Thermal Unit to Watt Hour Converter
Energy · unit-converter
Convert British Thermal Unit to Watt Hour 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: British Thermal Unit (btu)
To: Watt Hour (wh)
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.
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.
How to convert british thermal units to watt hours
1 british thermal unit is equal to 0.29307107017222 watt hour when both are expressed in joule-equivalents:
1 btu = (1,055.05585262 J ÷ 3,600 J) wh = 0.29307107017222 wh
Each british thermal unit is defined as 1,055.05585262 J and each watt hour as 3,600 J in this tool, so one btu equals 1,055.05585262 ÷ 3,600 wh = 0.29307107017222 wh.
Let d(btu) be the numeric amount in British Thermal Unit (btu), and d(wh) the amount in Watt Hour (wh). Then:
d(wh) = d(btu) × (1,055.05585262 / 3,600)
Equivalently, divide by how many btu fit into one wh (joules per wh divided by joules per btu):
d(wh) = d(btu) ÷ 3.41214163312794
Or: watt hour = british thermal unit ÷ 3.41214163312794
Examples
Example #1: Convert 1 btu to watt hour
1 btu = 1 btu × (1,055.05585262/3,600) wh = 0.2930710702 wh
1 btu = 1 btu ÷ 3.41214163312794 = 0.2930710702 wh
Example #2: Convert 10 btu to watt hour
10 btu = 10 btu × (1,055.05585262/3,600) wh = 2.9307107017 wh
10 btu = 10 btu ÷ 3.41214163312794 = 2.9307107017 wh
Summary
To convert British Thermal Unit to Watt Hour, multiply the value in btu by the ratio of joules per btu divided by joules per wh. Equivalently: value_wh = value_btu × (1055.05585262 / 3600). Numerically, 1 btu equals 0.2930710701722222 wh.
Relationship context
You are converting between US / imperial engineering units (BTU, therm, ft·lb) (British Thermal Units) and electrical energy (watt-hours) (Watt Hours). All values are mapped through joules first. The numeric factor is 2.930711e-1.
Conversion tables
| British Thermal Unit (btu) | Watt Hour (wh) |
|---|---|
| 0.1 | 0.029307107 |
| 1 | 0.2930710702 |
| 2 | 0.5861421403 |
| 3 | 0.8792132105 |
| 4 | 1.1722842807 |
| 5 | 1.4653553509 |
| 6 | 1.758426421 |
| 7 | 2.0514974912 |
| 8 | 2.3445685614 |
| 9 | 2.6376396315 |
| British Thermal Unit (btu) | Watt Hour (wh) |
|---|---|
| 10 | 2.9307107017 |
| 20 | 5.8614214034 |
| 30 | 8.7921321052 |
| 40 | 11.7228428069 |
| 50 | 14.6535535086 |
| 60 | 17.5842642103 |
| 70 | 20.5149749121 |
| 80 | 23.4456856138 |
| 90 | 26.3763963155 |
| 100 | 29.3071070172 |