Convert BTU (BTU) to calorie (cal).
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Calorie to BTU Converter (cal to BTU)
Convert calorie (cal) to BTU (BTU).Unit Converter · Energy
Quick answer
1 calorie (cal) is approximately equal to 0.00396567 BTUs (BTU). 1 BTU is approximately equal to 252.1644 calories (cal).
To convert cal to BTU, multiply the value in calories by 0.0039656668. For example, 10 cal = 0.03965667 BTU, and 100 cal = 0.39656668 BTU.
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How to convert calories to BTUs
How many BTUs are in a calorie? 1 calorie is about 0.00396567 BTUs. This free cal to BTU converter and calorie to BTU calculator gives the answer instantly for any value.
To convert calorie (cal) to BTU (BTU), multiply the value in calories by 0.0039656668.
BTU = cal × 0.0039656668
- 1
Take the value in calories
For example, 25 cal.
- 2
Multiply by 0.0039656668
25 × 0.0039656668.
- 3
Read the answer in BTUs
25 cal = 0.09914167 BTU.
Calorie to BTU conversion table
Common values from 1 to 1,000 calories converted to BTUs.
| Calorie (cal) | BTU (BTU) |
|---|---|
| 1 cal | 0.00396567 BTU |
| 2 cal | 0.00793133 BTU |
| 3 cal | 0.011897 BTU |
| 4 cal | 0.01586267 BTU |
| 5 cal | 0.01982833 BTU |
| 6 cal | 0.023794 BTU |
| 7 cal | 0.02775967 BTU |
| 8 cal | 0.03172533 BTU |
| 9 cal | 0.035691 BTU |
| 10 cal | 0.03965667 BTU |
| 15 cal | 0.059485 BTU |
| 20 cal | 0.07931334 BTU |
| 25 cal | 0.09914167 BTU |
| Calorie (cal) | BTU (BTU) |
|---|---|
| 30 cal | 0.11897 BTU |
| 40 cal | 0.15862667 BTU |
| 50 cal | 0.19828334 BTU |
| 60 cal | 0.23794001 BTU |
| 70 cal | 0.27759668 BTU |
| 75 cal | 0.29742501 BTU |
| 80 cal | 0.31725335 BTU |
| 90 cal | 0.35691001 BTU |
| 100 cal | 0.39656668 BTU |
| 250 cal | 0.99141671 BTU |
| 500 cal | 1.98283342 BTU |
| 1,000 cal | 3.96566683 BTU |
About calories and BTUs
Calorie (cal)
A calorie (cal) here is the thermochemical calorie, exactly 4.184 joules. Food "Calories" are kilocalories, a thousand times larger.
BTU (BTU)
A British thermal unit (BTU) is about 1,055 joules. It is used to rate air conditioners and heaters.
cal to BTU: common questions
- How many BTUs are in 1 calorie?
- 1 calorie (cal) is approximately equal to 0.00396567 BTUs (BTU). In short: 1 cal ≈ 0.00396567 BTU.
- How do I convert calories to BTUs?
- To convert cal to BTU, multiply the value in calories by 0.0039656668. For example, 5 cal = 0.01982833 BTU.
- How do I convert BTUs to calories?
- Use the Btu to Calorie converter, which applies the exact reverse factor.
- What is 10 cal in BTU, and what is 100 cal?
- 10 cal = 0.03965667 BTU, and 100 cal = 0.39656668 BTU. The table above lists more values from 1 to 1,000.
- Is this cal to BTU converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
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