Temperature Change Calculator

This calculator works out how much a material warms up or cools down when it gains or loses heat, using Q = m·c·ΔT. Enter the heat, the mass and the material (or your own specific heat) to get the temperature change and the final temperature. A second mode finds the change between two readings, converts it between Celsius, Kelvin and Fahrenheit, and can show the heat that change needs.

How to use this tool

1. Choose whether you are starting from an amount of heat or from two temperatures.
2. For heat: enter the energy and its unit (negative if heat is removed), the mass, and pick the material.
3. Choose the temperature scale and enter the starting temperature (plus the final one in the difference mode).
4. Read the temperature change, the final temperature and the conversions.

Formula

ΔT = Q ÷ (m × c) · T_final = T_initial + ΔT

Q is heat in joules, m mass in kilograms and c specific heat capacity in J/(kg·K). A change of 1 K is the same as 1 °C and equals 1.8 °F. The formula only holds while the material stays in one phase: melting or boiling absorbs heat without raising the temperature. The listed heat capacities are textbook reference values, not temperature-dependent property curves. Difference mode is a direct reading subtraction; mass is optional and only controls the heat estimate.

Example

Adding 62.79 kJ to 0.25 kg of water (c = 4,186 J/kg·K) at 20 °C gives ΔT = 62,790 ÷ (0.25 × 4,186) = 60 °C (108 °F), so the water ends at 80 °C. The same heat would warm 0.25 kg of aluminium (c = 900) by about 279 °C.