Quick answer: 1 Kilocalorie (kcal) in BTU
1 kcal equals 3.965667 BTU. To convert Kilocalorie (kcal) to BTU, multiply by 3.965667 using the free calculator above — no signup needed.
Energy & Work units
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About Energy & Work Converter
The Energy & Work Converter converts between 7 different units, including Joule, Kilojoule, Calorie, Kilocalorie (kcal), Watt-hour (Wh). The base unit is the Joule, and every other unit on this page is defined as an exact multiple of it. Type any value into the calculator above to convert instantly — free, unlimited, no signup and nothing to install.
Common equivalents: 1 Joule = 0.001 Kilojoule, 0.239006 Calorie, 0.000239006 Kilocalorie (kcal).
Scale of this category: the smallest unit is the Joule (J) and the largest is the Kilowatt-hour (kWh) (kWh).
Last updated: 2026-09-15
Energy & Work conversion factors
| Unit | Symbol | Value in Joule |
|---|---|---|
| Joule | J | 1 J = 1 J |
| Kilojoule | kJ | 1 kJ = 1000 J |
| Calorie | cal | 1 cal = 4.184 J |
| Kilocalorie (kcal) | kcal | 1 kcal = 4184 J |
| Watt-hour (Wh) | Wh | 1 Wh = 3600 J |
| Kilowatt-hour (kWh) | kWh | 1 kWh = 3600000 J |
| BTU | BTU | 1 BTU = 1055.06 J |
Worked Examples
See exactly how the conversion works with real numbers, step by step.
How much is 1 Kilocalorie (kcal) in BTU?
- Multiply 1 by the conversion factor 3.965667
- 1 Kilocalorie (kcal) = 3.965667 BTU
How much is 5 Kilocalorie (kcal) in BTU?
- Multiply 5 by the conversion factor 3.965667
- 5 Kilocalorie (kcal) = 19.828334 BTU
How much is 25 Kilocalorie (kcal) in BTU?
- Multiply 25 by the conversion factor 3.965667
- 25 Kilocalorie (kcal) = 99.141671 BTU
Quick Conversion Reference Table
| Kilocalorie (kcal) (kcal) | BTU (BTU) |
|---|---|
| 1 kcal (Kilocalorie (kcal)) | 3.965667 BTU (BTU) |
| 2 kcal (Kilocalorie (kcal)) | 7.931334 BTU (BTU) |
| 5 kcal (Kilocalorie (kcal)) | 19.828334 BTU (BTU) |
| 10 kcal (Kilocalorie (kcal)) | 39.656668 BTU (BTU) |
| 20 kcal (Kilocalorie (kcal)) | 79.313337 BTU (BTU) |
| 50 kcal (Kilocalorie (kcal)) | 198.283342 BTU (BTU) |
| 100 kcal (Kilocalorie (kcal)) | 396.566683 BTU (BTU) |
| 500 kcal (Kilocalorie (kcal)) | 1982.83 BTU (BTU) |
| 1000 kcal (Kilocalorie (kcal)) | 3965.67 BTU (BTU) |
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FAQ
How much is 1 Kilocalorie (kcal) in BTU?
1 Kilocalorie (kcal) = 3.965667 BTU.
How do I convert Kilocalorie (kcal) to BTU?
Enter your value in Kilocalorie (kcal) into the converter above and the result in BTU appears instantly. 1 kcal equals 3.965667 BTU — just multiply your value by 3.965667.
What is the formula for Kilocalorie (kcal) to BTU?
The formula is: value in BTU = value in Kilocalorie (kcal) × 3.965667. For example, 5 kcal × 3.965667 = 19.828334 BTU.
Is this Kilocalorie (kcal) to BTU converter free and accurate?
Yes. This Kilocalorie (kcal) to BTU converter is 100% free, uses the exact international conversion factor (3.965667), and works on any device with no signup.
How do I convert BTU back to Kilocalorie (kcal)?
To convert back, divide by 3.965667 (or multiply by 0.252164). You can also use our dedicated How Many Kilocalorie (kcal) in 1 BTU? page for instant results.
Do I need to download an app or sign up?
No. The converter runs entirely in your browser — nothing to install, no account, no fees. It even keeps working offline once the page has loaded.
Which Energy & Work units are supported?
This converter supports 7 units: Joule, Kilojoule, Calorie, Kilocalorie (kcal), Watt-hour (Wh), Kilowatt-hour (kWh), BTU.