Quick answer: 1 BTU in Calorie
1 BTU equals 252.164401 cal. To convert BTU to Calorie, multiply by 252.164401 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 BTU in Calorie?
- Multiply 1 by the conversion factor 252.164401
- 1 BTU = 252.164401 Calorie
How much is 5 BTU in Calorie?
- Multiply 5 by the conversion factor 252.164401
- 5 BTU = 1260.82 Calorie
How much is 25 BTU in Calorie?
- Multiply 25 by the conversion factor 252.164401
- 25 BTU = 6304.11 Calorie
Quick Conversion Reference Table
| BTU (BTU) | Calorie (cal) |
|---|---|
| 1 BTU (BTU) | 252.164401 cal (Calorie) |
| 2 BTU (BTU) | 504.328801 cal (Calorie) |
| 5 BTU (BTU) | 1260.82 cal (Calorie) |
| 10 BTU (BTU) | 2521.64 cal (Calorie) |
| 20 BTU (BTU) | 5043.29 cal (Calorie) |
| 50 BTU (BTU) | 12608.22 cal (Calorie) |
| 100 BTU (BTU) | 25216.44 cal (Calorie) |
| 500 BTU (BTU) | 126082.2 cal (Calorie) |
| 1000 BTU (BTU) | 252164.4 cal (Calorie) |
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How to Use This Converter
- Enter your value
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FAQ
How much is 1 BTU in Calorie?
1 BTU = 252.164401 Calorie.
How do I convert BTU to Calorie?
Enter your value in BTU into the converter above and the result in Calorie appears instantly. 1 BTU equals 252.164401 cal — just multiply your value by 252.164401.
What is the formula for BTU to Calorie?
The formula is: value in Calorie = value in BTU × 252.164401. For example, 5 BTU × 252.164401 = 1260.82 cal.
Is this BTU to Calorie converter free and accurate?
Yes. This BTU to Calorie converter is 100% free, uses the exact international conversion factor (252.164401), and works on any device with no signup.
How do I convert Calorie back to BTU?
To convert back, divide by 252.164401 (or multiply by 0.00396567). You can also use our dedicated How Many BTU in 1 Calorie? 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.