About the Heat Energy Calculator
Heat energy required for a temperature change (Q = mcΔT), in joules, kJ and kWh.
Also known as: q = mcat, thermal energy calculator, heat required, thermal-energy.
How to use this calculator
- Enter mass, specific heat capacity, temperature change.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Q = m × c × ΔT
Worked example
Using the values pre-filled in the calculator above:
- Mass = 2 kg
- Specific heat capacity = 4,186 J/(kg·K)
- Temperature change = 60 K or °C
the calculator returns:
- Heat energy: 502,320 J
- Kilojoules: 502.32
- Kilowatt-hours: 0.13953
- Time at 2 kW: 251.2 s