Calories to British thermal units Converter
1 calorie (cal) equals 0.003965666831 British thermal units (BTU).
Quick answer
- 1 calorie = 0.003965666831 British thermal units
- 1 British thermal unit = 252.1644007 calories
- Formula: BTU = cal × 0.003965666831
1 calorie = 0.003965666831 British thermal units
How to convert calories to British thermal units
BTU = cal × 0.003965666831
To convert calories to British thermal units, multiply the number of calories by 0.003965666831.
Example: 42 cal to BTU
- Start with the value in calories: 42 cal.
- Multiply by 0.003965666831: 42 × 0.003965666831 = 0.1665580069.
- Result: 42 calories = 0.1665580069 British thermal units.
Going the other way, 1 British thermal unit = 252.164400722 calories, so to convert British thermal units back to calories you divide by the same number. See British thermal units to calories.
Calories to British thermal units conversion table
| Calories (cal) | British thermal units (BTU) |
|---|---|
| 0.1 cal | 0.000396566683 BTU |
| 0.2 cal | 0.000793133366 BTU |
| 0.3 cal | 0.001189700049 BTU |
| 0.4 cal | 0.001586266733 BTU |
| 0.5 cal | 0.001982833416 BTU |
| 0.6 cal | 0.002379400099 BTU |
| 0.7 cal | 0.002775966782 BTU |
| 0.8 cal | 0.003172533465 BTU |
| 0.9 cal | 0.003569100148 BTU |
| 1 cal | 0.003965666831 BTU |
| 1.5 cal | 0.005948500247 BTU |
| 2 cal | 0.007931333663 BTU |
| 2.5 cal | 0.009914167078 BTU |
| 3 cal | 0.01189700049 BTU |
| 3.5 cal | 0.01387983391 BTU |
| 4 cal | 0.01586266733 BTU |
| 4.5 cal | 0.01784550074 BTU |
| 5 cal | 0.01982833416 BTU |
| 6 cal | 0.02379400099 BTU |
| 7 cal | 0.02775966782 BTU |
| 7.5 cal | 0.02974250124 BTU |
| 8 cal | 0.03172533465 BTU |
| 9 cal | 0.03569100148 BTU |
| 10 cal | 0.03965666831 BTU |
| 11 cal | 0.04362233515 BTU |
| 12 cal | 0.04758800198 BTU |
| 13 cal | 0.05155366881 BTU |
| 14 cal | 0.05551933564 BTU |
| 15 cal | 0.05948500247 BTU |
| 16 cal | 0.0634506693 BTU |
| 17 cal | 0.06741633613 BTU |
| 18 cal | 0.07138200297 BTU |
| 19 cal | 0.0753476698 BTU |
| 20 cal | 0.07931333663 BTU |
| 21 cal | 0.08327900346 BTU |
| 22 cal | 0.08724467029 BTU |
| 23 cal | 0.09121033712 BTU |
| 24 cal | 0.09517600395 BTU |
| 25 cal | 0.09914167078 BTU |
| 26 cal | 0.1031073376 BTU |
More cal to BTU values
- 27 cal
- 28 cal
- 29 cal
- 30 cal
- 31 cal
- 32 cal
- 33 cal
- 34 cal
- 35 cal
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- 1,000 cal
- 1,200 cal
- 1,500 cal
- 2,000 cal
- 2,500 cal
- 3,000 cal
- 4,000 cal
- 5,000 cal
- 10,000 cal
What is a calorie?
The calorie (small calorie) is the energy needed to raise the temperature of one gram of water by about one degree Celsius.
What is a British thermal unit?
The British thermal unit is the energy needed to raise the temperature of one pound of water by one degree Fahrenheit, about 1,055 joules.
Convert calories to other units
Convert other units to British thermal units
- Joules to British thermal units
- Kilocalories to British thermal units
- Kilowatt-hours to British thermal units
- Kilojoules to British thermal units
- Calories (food) to British thermal units
- Electronvolts to British thermal units
- Watt-hours to British thermal units
- Foot-pounds to British thermal units
- Megajoules to British thermal units
- Therms to British thermal units
- All British thermal unit conversions →
Frequently asked questions
How many British thermal units are in a calorie?
One calorie is 0.003965666831 British thermal units.
How many calories are in a British thermal unit?
One British thermal unit is 252.1644007 calories.
What is the formula to convert calories to British thermal units?
BTU = cal × 0.003965666831.