Convert Joule per kilogram kelvin to Watt-hour per kilogram kelvin
Convert Joule per kilogram kelvin (J/(kg·K)) to Watt-hour per kilogram kelvin (Wh/(kg·K)) instantly and accurately.
Conversion Formula
Wh/(kg·K) = J/(kg·K) × 0.0002777777778
About Joule per kilogram kelvin
The joule per kilogram kelvin (J/(kg·K)) is the SI coherent unit for specific heat capacity, defined by the relation Q = mcΔT. Water ≈4182, iron ≈449, aluminium ≈897, copper ≈385, glass ≈840 J/(kg·K). Referenced in ISO 31-4 and all major international standards. 1 J/(kg·K) = 1 J/(kg·°C) = 10⁻³ kJ/(kg·K).
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
| Joule per kilogram kelvin (J/(kg·K)) | Watt-hour per kilogram kelvin (Wh/(kg·K)) |
|---|---|
| 1 J/(kg·K) | 0.000277778 Wh/(kg·K) |
| 2 J/(kg·K) | 0.000555556 Wh/(kg·K) |
| 5 J/(kg·K) | 0.00138889 Wh/(kg·K) |
| 10 J/(kg·K) | 0.00277778 Wh/(kg·K) |
| 25 J/(kg·K) | 0.00694444 Wh/(kg·K) |
| 50 J/(kg·K) | 0.0138889 Wh/(kg·K) |
| 100 J/(kg·K) | 0.0277778 Wh/(kg·K) |