Specific Heat Calculator
The specific heat calculator computes thermal energy Q absorbed or released by a body using the formula Q = m · c · ΔT. Simply enter the mass, specific heat capacity, and temperature change.
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How to use the calculator?
Enter the mass in kilograms, the specific heat capacity in J/(kg·K), and the temperature change ΔT in kelvins or degrees Celsius. The calculator will instantly compute the thermal energy in joules, kilojoules, and kilocalories.
Calculation example
Heating 2 kg of water (c = 4186 J/(kg·K)) by ΔT = 50 K: Q = 2 × 4186 × 50 = 418,600 J = 418.6 kJ ≈ 100.05 kcal.
Frequently asked questions
What is specific heat capacity?
Specific heat capacity is the amount of thermal energy required to raise the temperature of 1 kg of a substance by 1 kelvin. It is a characteristic property of each material, expressed in J/(kg·K).
What formula does the calculator use?
The calculator uses Q = m · c · ΔT, where Q is thermal energy in joules, m is mass in kilograms, c is specific heat capacity in J/(kg·K), and ΔT is temperature change in kelvins.
What is the specific heat capacity of water?
Water has a specific heat capacity of approximately 4186 J/(kg·K), which is exceptionally high and makes water an excellent thermal medium.
Can I enter temperature in Celsius?
Yes — only the temperature difference ΔT matters in the formula. A change of 1°C equals a change of 1 K, so you can use either scale for the difference.
What does a negative energy result mean?
A negative Q means the substance is releasing heat — cooling down. You get a negative result by entering a negative ΔT value.
Which materials have high specific heat?
Water (4186 J/(kg·K)) and ice (2090 J/(kg·K)) are high. Common metals are much lower: copper ≈ 385, iron ≈ 449, aluminium ≈ 897 J/(kg·K).
How do I convert joules to kilocalories?
1 kcal = 4184 J. Divide the value in joules by 4184 to get kilocalories. The dietary calorie (kcal) is widely used in nutrition and food energy assessment.
Are the results accurate?
Results are mathematically accurate for the entered data. Real specific heat values may vary with temperature, pressure, and material purity.
Where are specific heat calculations used?
In building heating systems, heat exchanger design, food technology, materials engineering, laboratory calorimetry, and physics education.
Does specific heat depend on temperature?
Yes, values can vary slightly. Tabulated values are averages. For precise engineering work, consult thermodynamic tables for the relevant temperature range.
Results are for informational purposes only and do not constitute scientific or engineering advice. Specific heat values may vary depending on material purity, pressure, and temperature range.