Calorie to BTU Converter
1 Calorie = 0.00396565 BTU. To convert Calories to BTU, multiply by 0.00396565.
Result updates as you type
Recent:
1 Calorie = 0.00396565 BTU
Formula
To convert Calories to BTU, multiply the value by 0.00396565. One Calorie equals 0.00396565 BTU.
BTU = cal × 0.00396565
For a quick mental estimate, multiply Calories by about 0.004 — the exact factor is 0.00396565.
Worked examples
- 1 Calorie = 0.00396565 BTU
- 5 Calories = 0.01982826 BTU
- 10 Calories = 0.03965651 BTU
- 100 Calories = 0.39656512 BTU
Calories to BTU table
| Calories (cal) | BTU (BTU) |
|---|---|
| 1 | 0.00396565 |
| 2 | 0.0079313 |
| 3 | 0.01189695 |
| 4 | 0.0158626 |
| 5 | 0.01982826 |
| 10 | 0.03965651 |
| 25 | 0.09914128 |
| 50 | 0.19828256 |
| 100 | 0.39656512 |
| 250 | 0.99141281 |
| 500 | 1.9828 |
| 1000 | 3.9657 |
About Calorie and BTU
Both the Calorie (cal) and the BTU (BTU) measure energy. One Calorie is equal to 0.00396565 BTU, so you can convert any measurement by multiplying by 0.00396565. The calculator above updates instantly, and the reference table lists common Calorie-to-BTU values for quick lookups.
Unit definitions
- Calorie (cal)
- The Calorie (cal) is a unit of energy equal to 4.184 Joules.
- BTU (BTU)
- The BTU (BTU) is a unit of energy equal to 1055.06 Joules.
Frequently asked questions
- How do you convert Calories to BTU?
- Multiply the number of Calories by 0.00396565. For example, 1 Calorie × 0.00396565 = 0.00396565 BTU.
- How many BTU are in a Calorie?
- There are 0.00396565 BTU in one Calorie.
- What is 10 Calories in BTU?
- 10 Calories is equal to 0.03965651 BTU.
- How do you convert BTU back to Calories?
- Multiply the number of BTU by 252.1654 to get Calories. One BTU equals 252.1654 Calories.