Calorie to BTU Converter
Convert calories to btu with this free energy converter. The exact relationship used on this page is 1 calorie = 0.00396566683139 btu. Type any number — the result updates instantly, works on phones and desktops, and is ready to copy into homework, a spec sheet, or a shopping list.
Formula: BTU = Calorie × 0.00396566683139
How to convert calories to btu
- Enter the value in calories in the converter.
- Read the equivalent amount in btu.
- Use the swap link if you need btu to calorie instead.
- Check the table for common values without typing.
Worked examples
- 1 cal = 0.003965666831 BTU
- 5 cal = 0.01982833416 BTU
- 10 cal = 0.03965666831 BTU
- 25 cal = 0.09914167078 BTU
Conversion table
Common calories values converted to btu.
| cal | BTU |
|---|---|
| 1 | 0.003965666831 |
| 2 | 0.007931333663 |
| 3 | 0.01189700049 |
| 4 | 0.01586266733 |
| 5 | 0.01982833416 |
| 6 | 0.02379400099 |
| 7 | 0.02775966782 |
| 8 | 0.03172533465 |
| 9 | 0.03569100148 |
| 10 | 0.03965666831 |
| 20 | 0.07931333663 |
| 50 | 0.1982833416 |
| 100 | 0.3965666831 |
| 250 | 0.9914167078 |
| 500 | 1.982833416 |
| 1,000 | 3.965666831 |
About this conversion
Calorie (cal) and BTU (BTU) are both energy units. Energy converters connect food labels (kcal), electricity bills (kWh), physics (joules), and heating (BTU). Bookmark this URL when you convert calories to btu often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the btu to calorie converter.
FAQ
How many btu are in 1 calorie?+
1 calorie equals 0.00396566683139 btu.
What is the formula to convert calories to btu?+
BTU = Calorie × 0.00396566683139
How do I convert calories to btu by hand?+
Multiply the calorie value by 0.00396566683139. Example: 10 calories × 0.00396566683139 = 0.0396566683139 btu.
Is this cal to BTU converter accurate?+
Yes. Linear conversions use internationally agreed factors relative to SI. Temperature and inverse fuel units use the standard offset or reciprocal formulas, not a guessed scale factor.