calories to BTU
Convert calorie (small) to btu — instant, free, with the formula shown.
1 cal=0.003966 BTU
How to convert calorie (small) to btu
To convert calorie (small) to btu, multiply by 0.00396567:
BTU = cal × 0.00396567
For example, 10 cal × 0.003966 = 0.039657 BTU.
cal to BTU conversion table
| calories (cal) | BTU (BTU) |
|---|---|
| 1 cal | 0.003966 BTU |
| 2 cal | 0.007931 BTU |
| 5 cal | 0.019828 BTU |
| 10 cal | 0.039657 BTU |
| 25 cal | 0.099142 BTU |
| 50 cal | 0.198283 BTU |
| 100 cal | 0.396567 BTU |
| 250 cal | 0.991417 BTU |
| 500 cal | 1.982833 BTU |
| 1000 cal | 3.965667 BTU |
Other calorie (small) conversions
Convert to btu from another unit
cal to BTU — frequently asked
How many BTU are in 1 calorie (small)?
1 calorie (small) = 0.003966 BTU (cal × 0.003966 = BTU).
What is the formula to convert calorie (small) to btu?
Multiply your calorie (small) value by 0.00396567 to get btu.
How do I convert 10 calories to BTU?
10 cal = 0.039657 BTU. For 100 cal the answer is 0.396567 BTU. Use the calculator on this page for any other value.
When to convert calorie (small) to btu
1Electricity bills (kWh)
2Nutrition labels (kcal / food cal)
3HVAC and heating (BTU, therms)
4Physics and chemistry (J, eV)
Energy conversion — common questions
Is a food calorie the same as a calorie?
No — a food 'Calorie' (capital C) actually means 1 kilocalorie = 1,000 small calories = 4,184 J. Nutrition labels typically write 'cal' meaning kcal.
How many joules in 1 kWh?
1 kWh = 3,600,000 J (3.6 MJ). Because 1 kW × 1 hour = 1,000 W × 3,600 s = 3,600,000 J.
What is a BTU?
British Thermal Unit — the energy required to raise 1 pound of water by 1 °F. 1 BTU ≈ 1,055 J.
Related calculators & tools
Compound Interest Calculator
SIP, FD, and investment returns
BMI Calculator
Body Mass Index with Asian thresholds
Calorie Calculator
Daily intake, TDEE & macros
Loan EMI Calculator
Home, car & personal loan EMI
Caffeine Half-Life Calculator
How long caffeine stays in your system
Percentage Calculator
Convert marks to percentage