Convert Kilojoule per kilogram kelvin to Watt-hour per kilogram kelvin
Convert Kilojoule per kilogram kelvin (kJ/(kg·K)) to Watt-hour per kilogram kelvin (Wh/(kg·K)) instantly and accurately.
Conversion Formula
Wh/(kg·K) = kJ/(kg·K) × 0.2777777778
About Kilojoule per kilogram kelvin
The kilojoule per kilogram kelvin (kJ/(kg·K)) equals exactly 1000 J/(kg·K). The most common unit in engineering thermodynamics textbooks and technical data sheets: water ≈4.182, steam ≈2.08, dry air ≈1.005 kJ/(kg·K). Found throughout ASHRAE, ISO, and EN standards for heat exchanger and HVAC design. 1 kJ/(kg·K) = 1000 J/(kg·K) = 1 kJ/(kg·°C).
About Watt-hour per kilogram kelvin
The watt-hour per kilogram kelvin (Wh/(kg·K)) equals exactly 3600 J/(kg·K). Used in battery and thermal energy storage engineering to express the heat capacity of phase-change materials (PCM), molten salts, and battery cells where energy is quantified in watt-hours. Paraffin wax ≈0.055 Wh/(kg·K). 1 Wh/(kg·K) = 3600 J/(kg·K) = 3.6 kJ/(kg·K).
Quick Reference Table
| Kilojoule per kilogram kelvin (kJ/(kg·K)) | Watt-hour per kilogram kelvin (Wh/(kg·K)) |
|---|---|
| 1 kJ/(kg·K) | 0.277778 Wh/(kg·K) |
| 2 kJ/(kg·K) | 0.555556 Wh/(kg·K) |
| 5 kJ/(kg·K) | 1.38889 Wh/(kg·K) |
| 10 kJ/(kg·K) | 2.77778 Wh/(kg·K) |
| 25 kJ/(kg·K) | 6.94444 Wh/(kg·K) |
| 50 kJ/(kg·K) | 13.8889 Wh/(kg·K) |
| 100 kJ/(kg·K) | 27.7778 Wh/(kg·K) |