Kilojoules per kilogram to watt-hours per kilogram
Type a value in kJ/kg to get it in Wh/kg instantly.
626.9Wh/kg
That's about the same as boiling water. A 2 kW kettle would need about 1,129 seconds to supply that for one kilogram.
What it means
How much energy is that?
Latent heat is quoted at the transition temperature and pressure. Water’s 2,257 kJ/kg is at 100 °C; at 20 °C evaporation costs about 2,450.
The math
How to convert kJ/kg to Wh/kg
To convert kilojoules per kilogram to watt-hours per kilogram, multiply by 0.277778.
Example: 2,257 kJ/kg × 0.277778 = 626.944 Wh/kg.
In the other direction, 1 Wh/kg = 3.6 kJ/kg.
Every unit
Your latent heat in every unit
Tables
kJ/kg to Wh/kg conversion table
| kJ/kg | Wh/kg |
|---|---|
| 50 kJ/kg | 13.8889 Wh/kg |
| 100 kJ/kg | 27.7778 Wh/kg |
| 200 kJ/kg | 55.5556 Wh/kg |
| 334 kJ/kg | 92.7778 Wh/kg |
| 500 kJ/kg | 138.889 Wh/kg |
| 1,000 kJ/kg | 277.778 Wh/kg |
| 1,500 kJ/kg | 416.667 Wh/kg |
| 2,000 kJ/kg | 555.556 Wh/kg |
| 2,257 kJ/kg | 626.944 Wh/kg |
| 2,500 kJ/kg | 694.444 Wh/kg |
| 5,000 kJ/kg | 1,388.89 Wh/kg |
Wh/kg to kJ/kg conversion table
| Wh/kg | kJ/kg |
|---|---|
| 50 Wh/kg | 180 kJ/kg |
| 100 Wh/kg | 360 kJ/kg |
| 200 Wh/kg | 720 kJ/kg |
| 334 Wh/kg | 1,202.4 kJ/kg |
| 500 Wh/kg | 1,800 kJ/kg |
| 1,000 Wh/kg | 3,600 kJ/kg |
| 1,500 Wh/kg | 5,400 kJ/kg |
| 2,000 Wh/kg | 7,200 kJ/kg |
| 2,257 Wh/kg | 8,125.2 kJ/kg |
| 2,500 Wh/kg | 9,000 kJ/kg |
| 5,000 Wh/kg | 18,000 kJ/kg |
Quick answers
Quick answers
- How many Wh/kg is 1 kJ/kg?
- 1 kJ/kg is 0.277778 Wh/kg.
- How many Wh/kg is 10 kJ/kg?
- 10 kJ/kg is 2.77778 Wh/kg.
- How many Wh/kg is 2,257 kJ/kg?
- 2,257 kJ/kg is 626.944 Wh/kg.
The units
About these units
Kilojoules per kilogram (kJ/kg)
The SI standard for latent heat.
Watt-hours per kilogram (Wh/kg)
A convenient size for heat pumps and driers.
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