Convert International table BTU per pound per degree Fahrenheit to Watt-hour per kilogram kelvin
Convert International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) to Watt-hour per kilogram kelvin (Wh/(kg·K)) instantly and accurately.
Conversion Formula
Wh/(kg·K) = BTU(IT)/(lb·°F) × 1.163
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).
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
| International table BTU per pound per degree Fahrenheit (BTU(IT)/(lb·°F)) | Watt-hour per kilogram kelvin (Wh/(kg·K)) |
|---|---|
| 1 BTU(IT)/(lb·°F) | 1.163 Wh/(kg·K) |
| 2 BTU(IT)/(lb·°F) | 2.326 Wh/(kg·K) |
| 5 BTU(IT)/(lb·°F) | 5.815 Wh/(kg·K) |
| 10 BTU(IT)/(lb·°F) | 11.63 Wh/(kg·K) |
| 25 BTU(IT)/(lb·°F) | 29.075 Wh/(kg·K) |
| 50 BTU(IT)/(lb·°F) | 58.15 Wh/(kg·K) |
| 100 BTU(IT)/(lb·°F) | 116.3 Wh/(kg·K) |