Watt Hour to Kilocalorie Converter
Energy · unit-converter
Convert Watt Hour to Kilocalorie 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: Kilocalorie (kcal)
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 Kilocalorie
The kilocalorie (kcal) is 1,000 calories in the nutrition sense—often labeled “Calorie” on food packaging. Here 1 kcal = 4,184 J (thermochemical calorie definition used in this tool).
How to convert watt hours to kilocalories
1 watt hour is equal to 0.8604206500956 kilocalorie when both are expressed in joule-equivalents:
1 wh = (3,600 J ÷ 4,184 J) kcal = 0.8604206500956 kcal
Each watt hour is defined as 3,600 J and each kilocalorie as 4,184 J in this tool, so one wh equals 3,600 ÷ 4,184 kcal = 0.8604206500956 kcal.
Let d(wh) be the numeric amount in Watt Hour (wh), and d(kcal) the amount in Kilocalorie (kcal). Then:
d(kcal) = d(wh) × (3,600 / 4,184)
Equivalently, divide by how many wh fit into one kcal (joules per kcal divided by joules per wh):
d(kcal) = d(wh) ÷ 1.16222222222222
Or: kilocalorie = watt hour ÷ 1.16222222222222
Examples
Example #1: Convert 1 wh to kilocalorie
1 wh = 1 wh × (3,600/4,184) kcal = 0.8604206501 kcal
1 wh = 1 wh ÷ 1.16222222222222 = 0.8604206501 kcal
Example #2: Convert 10 wh to kilocalorie
10 wh = 10 wh × (3,600/4,184) kcal = 8.604206501 kcal
10 wh = 10 wh ÷ 1.16222222222222 = 8.604206501 kcal
Summary
To convert Watt Hour to Kilocalorie, multiply the value in wh by the ratio of joules per wh divided by joules per kcal. Equivalently: value_kcal = value_wh × (3600 / 4184). Numerically, 1 wh equals 0.8604206500956023 kcal.
Relationship context
You are converting between electrical energy (watt-hours) (Watt Hours) and food / nutrition energy (calories) (Kilocalories). All values are mapped through joules first. The numeric factor is 8.604207e-1.
Conversion tables
| Watt Hour (wh) | Kilocalorie (kcal) |
|---|---|
| 0.1 | 0.086042065 |
| 1 | 0.8604206501 |
| 2 | 1.7208413002 |
| 3 | 2.5812619503 |
| 4 | 3.4416826004 |
| 5 | 4.3021032505 |
| 6 | 5.1625239006 |
| 7 | 6.0229445507 |
| 8 | 6.8833652008 |
| 9 | 7.7437858509 |
| Watt Hour (wh) | Kilocalorie (kcal) |
|---|---|
| 10 | 8.604206501 |
| 20 | 17.2084130019 |
| 30 | 25.8126195029 |
| 40 | 34.4168260038 |
| 50 | 43.0210325048 |
| 60 | 51.6252390057 |
| 70 | 60.2294455067 |
| 80 | 68.8336520076 |
| 90 | 77.4378585086 |
| 100 | 86.0420650096 |