Edit either value. Decimals and scientific notation supported.
1
Wh
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JouleJ
KilojoulekJ
MegajouleMJ
Watt-hourWh
Kilowatt-hourkWh
Thermochemical caloriecal
Kilocalorie (food Calorie)kcal
BTU (international table)BTU (IT)
ElectronvolteV
No units found. Try a name or symbol.
0.001
kWh
esc
JouleJ
KilojoulekJ
MegajouleMJ
Watt-hourWh
Kilowatt-hourkWh
Thermochemical caloriecal
Kilocalorie (food Calorie)kcal
BTU (international table)BTU (IT)
ElectronvolteV
No units found. Try a name or symbol.
CONVERSION
1 Wh ≈ 0.001 kWh
6 significant figures
10 significant figures
15 significant figures
Precision changes displayed rounding, not calculation accuracy.
FORMULAkWh = Wh ÷ 1000
FORMULA & EXAMPLES
How to convert Watt-hours to kilowatt-hours
kWh = Wh ÷ 1000
Divide the Wh reading by 1000.
Worked examples
1 Wh ≈ 0.001 kWh
1 ÷ 1000 ≈ 0.001
1000 Wh ≈ 1 kWh
1000 ÷ 1000 ≈ 1
Frequently asked questions
Is a watt-hour the same quantity as a watt?
No. A watt-hour measures energy; a watt measures power. One watt-hour is the energy transferred at one watt for one hour, equal to 3,600 joules.
Watt-hours to kilowatt-hours table
Fixed reference · Watt-hour to Kilowatt-hour
Reference values use this page’s named pair and default context. Calculator precision and font settings do not change this table.
Watt-hour (Wh)
Kilowatt-hour (kWh)
0
0
0.1
0.0001
0.5
0.0005
1
0.001
2
0.002
5
0.005
10
0.01
25
0.025
50
0.05
100
0.1
1000
1
Table results use 10 significant figures; decimal formula coefficients use up to 15. Calculations use the unit definitions before rounding. Extra digits do not improve measurement accuracy.