Watt Hour to Calorie Converter
Energy · unit-converter
Convert Watt Hour to Calorie 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: Calorie (cal)
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 Calorie
The small calorie (cal) is 4.184 J in this converter (thermochemical). Do not confuse with the dietary kilocalorie (kcal).
How to convert watt hours to calories
1 watt hour is equal to 860.42065009560224 calorie when both are expressed in joule-equivalents:
1 wh = (3,600 J ÷ 4.184 J) cal = 860.42065009560224 cal
Each watt hour is defined as 3,600 J and each calorie as 4.184 J in this tool, so one wh equals 3,600 ÷ 4.184 cal = 860.42065009560224 cal.
Let d(wh) be the numeric amount in Watt Hour (wh), and d(cal) the amount in Calorie (cal). Then:
d(cal) = d(wh) × (3,600 / 4.184)
Equivalently, divide by how many wh fit into one cal (joules per cal divided by joules per wh):
d(cal) = d(wh) ÷ 0.00116222222222
Or: calorie = watt hour ÷ 0.00116222222222
Examples
Example #1: Convert 1 wh to calorie
1 wh = 1 wh × (3,600/4.184) cal = 860.420650096 cal
1 wh = 1 wh ÷ 0.00116222222222 = 860.420650096 cal
Example #2: Convert 10 wh to calorie
10 wh = 10 wh × (3,600/4.184) cal = 8604.20650096 cal
10 wh = 10 wh ÷ 0.00116222222222 = 8604.20650096 cal
Summary
To convert Watt Hour to Calorie, multiply the value in wh by the ratio of joules per wh divided by joules per cal. Equivalently: value_cal = value_wh × (3600 / 4.184). Numerically, 1 wh equals 860.4206500956022 cal.
Relationship context
You are converting between electrical energy (watt-hours) (Watt Hours) and food / nutrition energy (calories) (Calories). All values are mapped through joules first. The numeric factor is 8.604207e+2.
Conversion tables
| Watt Hour (wh) | Calorie (cal) |
|---|---|
| 0.1 | 86.0420650096 |
| 1 | 860.420650096 |
| 2 | 1,720.84130019 |
| 3 | 2,581.26195029 |
| 4 | 3,441.68260038 |
| 5 | 4,302.10325048 |
| 6 | 5,162.52390057 |
| 7 | 6,022.94455067 |
| 8 | 6,883.36520076 |
| 9 | 7,743.78585086 |
| Watt Hour (wh) | Calorie (cal) |
|---|---|
| 10 | 8,604.20650096 |
| 20 | 17,208.4130019 |
| 30 | 25,812.6195029 |
| 40 | 34,416.8260038 |
| 50 | 43,021.0325048 |
| 60 | 51,625.2390057 |
| 70 | 60,229.4455067 |
| 80 | 68,833.6520076 |
| 90 | 77,437.8585086 |
| 100 | 86,042.0650096 |