What is specific heat capacity?

Specific heat capacity is the amount of energy needed to raise the temperature of one unit of mass of a substance by one degree. It's a property of the material itself, unlike total heat capacity, which also depends on how much of the substance you have.

Why is water's specific heat capacity so high?

Water's specific heat capacity, about 4184 J/(kg·K), is unusually high because of the strong hydrogen bonds between water molecules, which absorb a lot of energy before the temperature actually rises. This is why large bodies of water heat up and cool down slowly compared to land.

How do I convert cal/(g·°C) to J/(kg·K)?

Multiply the cal/(g·°C) value by 4184. For example, water's specific heat, 1 cal/(g·°C), equals 4184 J/(kg·K).

What's the difference between specific heat capacity and heat capacity?

Specific heat capacity is a per-unit-mass property of a material, measured in units like J/(kg·K). Heat capacity is the total energy needed to raise an entire object's temperature by one degree, measured in J/K, and depends on both the material and how much mass is present.

How do I calculate the heat energy needed to warm something?

Multiply the mass by the specific heat capacity by the temperature change: Q = mcΔT. For example, heating 2 kg of water (4184 J/(kg·K)) by 10 degrees takes 2 × 4184 × 10 = 83,680 joules.

Why are cal/(g·°C) and kcal/(kg·°C) the same number?

Because both the top and bottom of the unit scale up by the same factor of 1,000 (calories to kilocalories, grams to kilograms), so the ratio stays identical. Both equal exactly 4184 J/(kg·K).

What is Btu/(lb·°F) used for?

Btu per pound per degree Fahrenheit is the US customary unit for specific heat capacity, commonly used in HVAC, materials engineering and US textbooks. It equals about 4186.8 J/(kg·K).

Is specific heat capacity the same as latent heat?

No. Specific heat capacity describes the energy needed to change a substance's temperature. Latent heat describes the energy needed to change its phase, like melting or boiling, at a constant temperature, and is a completely different quantity with different units.

Is this calculator accurate enough for engineering use?

The conversion factors and formula are standard physics, so the math itself is reliable. Real specific heat values vary with temperature and material purity, so always use a verified reference value or datasheet figure for precise engineering work.

Is this specific heat capacity converter free to use?

Yes, it is completely free, requires no registration, and runs entirely in your browser with no usage limits.

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Specific Heat Capacity Conversions

8 units · heat energy calculator

Specific Heat Capacity Converter

Convert instantly between J/(kg·K), cal/(g·°C), kcal/(kg·°C) and Btu/(lb·°F), then calculate the heat energy needed to change a mass's temperature — all calculated in your browser.

8Specific heat units

4184J/(kg·K) in water

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cal/(g·°C)

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J/(kg·K)

4184J/(kg·K)

J/(kg·K) = cal/(g·°C) × 4184

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83,680 J

Q = m × c × ΔT = 2 kg × 4184 J/(kg·K) × 10 = 83680 J

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cal/(g·°C)	J/(kg·K)

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