How to convert kilocalories to BTU
To convert kilocalories to BTU, multiply the value by the conversion factor 3.965666831. To go the other way, multiply by 0.2521644007 (or divide by 3.965666831).
Worked example: 25 kcal to BTU
- Write the value: 25 kcal
- Multiply by 3.965666831: 25 × 3.965666831
- Result: 99.1417 BTU
Kilocalorie to BTU conversion table
Quick reference values, rounded to 6 significant digits.
| Kilocalorie (kcal) | BTU (BTU) |
|---|---|
| 0.1 kcal | 0.396567 BTU |
| 0.25 kcal | 0.991417 BTU |
| 0.5 kcal | 1.98283 BTU |
| 1 kcal | 3.96567 BTU |
| 2 kcal | 7.93133 BTU |
| 3 kcal | 11.897 BTU |
| 4 kcal | 15.8627 BTU |
| 5 kcal | 19.8283 BTU |
| 6 kcal | 23.794 BTU |
| 7 kcal | 27.7597 BTU |
| 8 kcal | 31.7253 BTU |
| 9 kcal | 35.691 BTU |
| 10 kcal | 39.6567 BTU |
| 12 kcal | 47.588 BTU |
| 15 kcal | 59.485 BTU |
| 20 kcal | 79.3133 BTU |
| 25 kcal | 99.1417 BTU |
| 30 kcal | 118.97 BTU |
| 40 kcal | 158.627 BTU |
| 50 kcal | 198.283 BTU |
| 75 kcal | 297.425 BTU |
| 100 kcal | 396.567 BTU |
| 250 kcal | 991.417 BTU |
| 500 kcal | 1,982.83 BTU |
| 1,000 kcal | 3,965.67 BTU |
BTU to Kilocalorie
| BTU | kcal |
|---|---|
| 1 BTU | 0.252164 kcal |
| 5 BTU | 1.26082 kcal |
| 10 BTU | 2.52164 kcal |
| 50 BTU | 12.6082 kcal |
| 100 BTU | 25.2164 kcal |
1 Kilocalorie in other energy units
About Kilocalorie and BTU
What is a kilocalorie (kcal)?
A kilocalorie (food Calorie) equals 1,000 calories, used for diet and nutrition.
What is a btu (BTU)?
A British Thermal Unit is the energy to heat one pound of water by 1 °F.
Where kilocalorie to btu conversion is used
Energy conversions are needed for electricity bills, food calories, heating, batteries and physics. Converting between kilocalories and BTU is especially common when you compare products, read foreign specifications, or fill in forms that expect a specific unit.
Need every unit at once? Use the full Energy Converter.
Frequently asked questions
How many BTU are in 1 kilocalorie?
1 Kilocalorie equals 3.96567 BTU.
How do I convert kilocalories to BTU?
Multiply the number of kilocalories by 3.965666831. For example, 25 kcal × 3.965666831 = 99.1417 BTU.
What is 25 kcal in BTU?
25 kcal = 99.1417 BTU.
How many kilocalories are in 1 btu?
1 BTU equals 0.252164 kcal. Use the BTU to Kcal converter for the reverse direction.
Is this Kilocalorie to BTU converter accurate?
Yes. It uses exact internationally defined conversion factors, calculated with full floating-point precision. Results are displayed rounded for readability.