Kilocalories (kcal) to Watt-Hours (Wh) Converter
Enter a value to instantly convert between energy units.
1 Kilocalorie = 1.1622 Watt-Hour
Key Formulas
Kilocalorie → Kilojoule
kJ = kcal × 4.184Kilojoule → Kilocalorie
kcal = kJ × 0.239006Kilowatt-Hour → Joule
J = kWh × 3600000Joule → Kilowatt-Hour
kWh = J × 2.77778e-7Formula
Wh = kcal × 1.162One kilocalorie (kcal, or dietary Calorie) equals 1.162 watt-hours. Since 1 kcal = 4184 J and 1 Wh = 3600 J, the conversion is 1 kcal = 4184/3600 = 1.162 Wh. This is useful when comparing food energy to electrical energy.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A nutritionist explaining that 1 kcal (one dietary Calorie) equals 1.162 Wh for the lecture.
1 kcal = 1.162 Wh
A diet plan of 2000 kcal/day converts to 2324 Wh/day (2.32 kWh) for energy comparison.
2000 kcal = 2324 Wh
A chocolate bar with 500 kcal provides 581 Wh of energy — about the capacity of a small UPS.
500 kcal = 581 Wh
A fitness app showing 100 kcal burned converts to 116.2 Wh for the energy display.
100 kcal = 116.2 Wh