Convert Watt-hour per kilogram kelvin to International table BTU per pound per degree Fahrenheit
Convert Watt-hour per kilogram kelvin (Wh/(kg·K)) to International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) instantly and accurately.
Conversion Formula
BTU(IT)/(lb·°F) = Wh/(kg·K) × 0.8598452279
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).
About International table BTU per pound per degree Fahrenheit
The international table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) equals (1055.05585262 × 9)/(0.45359237 × 5) J/(kg·K) = 4186.8 J/(kg·K). The standard US unit for specific heat capacity in ASHRAE, ASTM, and mechanical engineering references. Water: 1.000 BTU(IT)/(lb·°F); steel: ≈0.108; air: ≈0.240. 1 BTU(IT)/(lb·°F) = 4186.8 J/(kg·K).
Quick Reference Table
| Watt-hour per kilogram kelvin (Wh/(kg·K)) | International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) |
|---|---|
| 1 Wh/(kg·K) | 0.859845 BTU(IT)/(lb·°F) |
| 2 Wh/(kg·K) | 1.71969 BTU(IT)/(lb·°F) |
| 5 Wh/(kg·K) | 4.29923 BTU(IT)/(lb·°F) |
| 10 Wh/(kg·K) | 8.59845 BTU(IT)/(lb·°F) |
| 25 Wh/(kg·K) | 21.4961 BTU(IT)/(lb·°F) |
| 50 Wh/(kg·K) | 42.9923 BTU(IT)/(lb·°F) |
| 100 Wh/(kg·K) | 85.9845 BTU(IT)/(lb·°F) |