Watt Hour to Joule Converter
Energy · unit-converter
Convert Watt Hour to Joule 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: Joule (j)
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 Joule
The joule is the SI unit of energy. All other units here are converted through fixed joule equivalents.
How to convert watt hours to joules
1 watt hour is equal to 3600 joule when both are expressed in joule-equivalents:
1 wh = (3,600 J ÷ 1 J) j = 3600 j
1 Wh = 1 W × 3,600 s / 1,000 = 3,600 J (one watt for one hour).
Each watt hour is defined as 3,600 J and each joule as 1 J in this tool, so one wh equals 3,600 ÷ 1 j = 3600 j.
Let d(wh) be the numeric amount in Watt Hour (wh), and d(j) the amount in Joule (j). Then:
d(j) = d(wh) × (3,600 / 1)
Equivalently, divide by how many wh fit into one j (joules per j divided by joules per wh):
d(j) = d(wh) ÷ 0.00027777777778
Or: joule = watt hour ÷ 0.00027777777778
Examples
Example #1: Convert 1 wh to joule
1 wh = 1 wh × (3,600/1) j = 3600 j
1 wh = 1 wh ÷ 0.00027777777778 = 3600 j
Example #2: Convert 10 wh to joule
10 wh = 10 wh × (3,600/1) j = 36000 j
10 wh = 10 wh ÷ 0.00027777777778 = 36000 j
Summary
To convert Watt Hour to Joule, multiply the value in wh by the ratio of joules per wh divided by joules per j. Equivalently: value_j = value_wh × (3600 / 1). Numerically, 1 wh equals 3600 j.
Relationship context
You are converting between electrical energy (watt-hours) (Watt Hours) and SI energy (joules) (Joules). All values are mapped through joules first. The numeric factor is 3.600000e+3.
Conversion tables
| Watt Hour (wh) | Joule (j) |
|---|---|
| 0.1 | 360 |
| 1 | 3,600 |
| 2 | 7,200 |
| 3 | 10,800 |
| 4 | 14,400 |
| 5 | 18,000 |
| 6 | 21,600 |
| 7 | 25,200 |
| 8 | 28,800 |
| 9 | 32,400 |
| Watt Hour (wh) | Joule (j) |
|---|---|
| 10 | 36,000 |
| 20 | 72,000 |
| 30 | 108,000 |
| 40 | 144,000 |
| 50 | 180,000 |
| 60 | 216,000 |
| 70 | 252,000 |
| 80 | 288,000 |
| 90 | 324,000 |
| 100 | 360,000 |