Thermal Capacity
Wh/KtoJ/K
Convert watt-hours per kelvin (Wh/K) to joules per kelvin (J/K).
Factor1 Wh/K = 3600 J/K
Converter
Wh/K
Accepts numbers or expressions, e.g. 150 + 14.7
Result
J/K
Rendered to 6 significant figures.
Formula
Formula
J/K = Wh/K × 3600
Multiply any value in watt-hours per kelvin by 3600 to obtain the value in joules per kelvin.
Worked example
Convert 1 Wh/K to J/K.
- 01Start with 1 Wh/K.
- 02Multiply by the conversion factor: 1 × 3600 = 3600 J/K.
Result1 Wh/K = 3600 J/K
Conversion table
| Wh/K | J/K |
|---|---|
| 1 | 3600 |
| 2 | 7200 |
| 5 | 18000 |
| 10 | 36000 |
| 20 | 72000 |
| 50 | 1.8000e+5 |
| 100 | 3.6000e+5 |
| 200 | 7.2000e+5 |
| 500 | 1.8000e+6 |
| 1000 | 3.6000e+6 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from Wh/K to J/K?
1 Wh/K equals 3600 J/K. To convert, multiply the value in watt-hours per kelvin by 3600.
How do I convert 1 Wh/K to J/K?
1 Wh/K = 3600 J/K. For any value, multiply by 3600.
How do I convert J/K back to Wh/K?
Divide by the same factor — or equivalently, multiply by 0.0002777778. So 1 J/K = 0.000277778 Wh/K.
When would I need to convert watt-hour per kelvin to joule per kelvin?
Thermal-capacity conversions between Wh/K and J/K appear in thermal-mass analysis of bodies, calorimetry, R-C thermal-network modelling, electronics thermal capacitance and large-equipment thermal-storage sizing. J/K and kJ/K are the SI standard; MJ/K and kWh/K cover large-equipment and building thermal-mass notation; BTU/°F is the US convention; cal/K and kcal/K are common in chemistry and thermochemistry. This category is lumped heat capacity only — it does NOT include specific heat capacity (J/(kg·K), requires mass), molar heat capacity (J/(mol·K), requires molecular weight) or volumetric heat capacity, all of which are different physical quantities.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).