Heat Capacity & Specific Heat Calculator | Energy Tool

Q: Is heat capacity the same as thermal conductivity?

No. Heat capacity is about storage (how much heat an object can hold), while thermal conductivity is about transfer (how fast heat moves through the material). For example, water holds heat well (high capacity) but doesn't conduct it as fast as copper.

Calculate heat energy required for temperature changes, determine specific heat, or solve for mass using standard thermodynamic equations.

I want to calculate:

Material Preset

Specific Heat Capacity (c) Intensive property

J/g·°C

Mass (m)

Temperature Input Mode

Enter ΔT Initial / Final

Change in Temperature (ΔT)

°C

Result

Total Heat (Q)

0 J

Total thermal energy added to the system.

Heat Capacity (C) 0 J/°C

Extensive property (depends on mass).

Heat Capacity Comparison

How it works

This calculator uses the formula Q = mcΔT. It dynamically rearranges the equation based on what you want to solve for. Simply select your target variable, choose a material (or enter a custom specific heat), and input the known values.

Assumptions

Constant Pressure: Assumes isobaric specific heat (Cp).
No Phase Change: Formula valid only within a single state of matter (e.g., liquid water).
Homogeneous Material: The object has uniform density and composition.
Uniform Temperature: Assumes the object has no internal thermal gradient.

Heat Capacity vs. Specific Heat: What's the difference?

It is common to confuse "Heat Capacity" with "Specific Heat Capacity," but in thermodynamics, the distinction is crucial:

Heat Capacity (C) is an extensive property. It refers to the amount of heat energy required to raise the temperature of a whole object by one degree. A swimming pool has a much higher heat capacity than a cup of water, simply because it is larger.
Specific Heat Capacity (c) is an intensive property. It refers to the heat needed to raise just one unit of mass (like 1 gram or 1 kilogram) by one degree. The specific heat of water is the same whether you have a drop or an ocean.

Water has a famously high specific heat, which is why it is excellent for cooling systems and why coastal climates are milder than inland areas.

The Heat Transfer Formula (Q = mcΔT)

Q = m · c · ΔT

Q = Heat Energy (Joules, Calories, or BTU)

m = Mass of the substance (grams or kg/lb)

c = Specific Heat Capacity

ΔT = Change in Temperature (Final Temp - Initial Temp)

Specific Heat Capacity Table of Common Materials

Material	Metric (J/g·°C)	Imperial (BTU/lb·°F)
Water (Liquid)	4.184	~1.00
Ice (Solid)	2.093	~0.50
Air (Dry)	1.005	0.24
Aluminum	0.897	0.21
Iron	0.449	0.11
Copper	0.385	0.09

Frequently Asked Questions

Why does water have such a high heat capacity?

Due to hydrogen bonding, water molecules require significantly more energy to increase their kinetic motion compared to most other substances. This property allows water to absorb a lot of heat without a drastic rise in temperature.

Is heat capacity the same as thermal conductivity?

No. Heat capacity is about storage (how much heat an object can hold), while thermal conductivity is about transfer (how fast heat moves through the material). For example, water holds heat well (high capacity) but doesn't conduct it as fast as copper.