What is the formula this calculator uses?

The calculator uses Q = mcΔT, where Q is heat energy in joules, m is mass in kilograms, c is specific heat capacity in J/(kg·K), and ΔT is the change in temperature in Kelvin or Celsius (the difference is the same).

What is specific heat capacity?

Specific heat capacity (c) is the amount of energy required to raise 1 kg of a substance by 1°C (or 1 K). For example, water has a specific heat of 4,186 J/(kg·K), meaning it takes 4,186 J to heat 1 kg of water by 1°C.

Can I use Celsius instead of Kelvin for temperature?

Yes. Because ΔT is a difference in temperature, a change of 1°C equals a change of 1 K. You can enter temperature values in Celsius as long as you subtract them consistently (T_final − T_initial).

What does a negative Q value mean?

A negative Q indicates the substance is releasing heat (cooling down). A positive Q means heat is being absorbed (warming up).

Where can I find specific heat values for materials?

This calculator includes a reference table of common materials. You can also click any material to auto-fill its specific heat capacity into the calculator.

What units does this calculator support?

Heat energy: Joules (J), kilojoules (kJ), and calories (cal). Mass: grams (g) and kilograms (kg). Temperature change: Celsius/Kelvin (°C / K). Specific heat: J/(kg·K) and J/(g·°C).

Specific Heat Calculator

Name: Specific Heat Calculator
Availability: InStock
Author: Nham Vu

Solve for any variable in Q = mcΔT — heat energy, mass, specific heat capacity, or temperature change.

Q = mcΔT Calculator

Select the unknown variable, fill in the other three, then click Calculate.

Solve for

Heat Energy (Q)

Mass (m)

Specific Heat (c)

Temperature Change (ΔT)

°C / K

Result

Enter values and click Calculate

Common Specific Heat Values

Click a material to auto-fill the specific heat field.

Summary

Solve for any variable in Q = mcΔT — heat energy, mass, specific heat capacity, or temperature change.

How it works

Select which variable you want to solve for (Q, m, c, or ΔT).
Enter the three known values in the corresponding input fields.
Choose the appropriate unit for each quantity.
Click Calculate to get the result with a step-by-step breakdown.
Use the materials reference table to look up common specific heat values.

Use cases

Calculate the heat needed to warm or cool a substance in chemistry lab.
Determine the mass of a material given measured temperature and energy data.
Find the specific heat capacity of an unknown substance from calorimetry experiments.
Compute temperature rise in engineering thermal systems.
Solve physics homework problems involving calorimetry.
Estimate energy requirements for heating water or metals in manufacturing.

Frequently Asked Questions

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Last updated: 2026-05-23 · Reviewed by Nham Vu