Watt-Hours (Wh) to Calories (cal) Converter
Enter a value to instantly convert between energy units.
1 Watt-Hour = 860.4207 Calorie (thermochemical)
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
cal = Wh × 859.845One watt-hour equals 859.845 thermochemical calories. This conversion is useful when comparing electrical energy costs to food energy, or when calculating the metabolic cost of exercise in calories burned versus electrical energy expended.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A nutritionist explaining that 1 Wh of electrical energy equals about 860 cal for the lecture.
1 Wh = 859.85 cal
A data center using 100 Wh per hour calculates 85,985 cal per hour for the energy comparison.
100 Wh = 85984.5 cal
A researcher comparing 0.5 Wh of exercise equipment energy to metabolic calories records 430 cal.
0.5 Wh = 429.92 cal
A fitness coach explaining 10 Wh of cycling energy burns about 8600 cal for the class.
10 Wh = 8598.45 cal