Btu to Calories
1 btu = 252.165 calories (cal)
Convert btu to calories instantly. 1 btu = 252.165 calories. Free, accurate, with conversion table and formula.
BTU (BTU)
Calorie (cal)
| Unit | 1 BTU equals |
|---|---|
| Joule (J) | 1,055.06 |
| Kilojoule (kJ) | 1.05506 |
| Calorie (cal) | 252.165 |
| Kilocalorie (kcal) | 0.252165 |
| Watt Hour (Wh) | 0.293072 |
| Kilowatt Hour (kWh) | 0.000293072 |
| BTU (BTU) | 1 |
| Electron Volt (eV) | 6.58517e+21 |
| Foot-Pound (ft·lb) | 778.171 |
How to convert btu to calories
- 1Take your value in btu (BTU).
- 2Multiply by 252.165.
- 3The result is your value in calories (cal).
Btu to Calories conversion table
| Btu (BTU) | Calories (cal) |
|---|---|
| 1 | 252.165 |
| 2 | 504.331 |
| 5 | 1,260.83 |
| 10 | 2,521.65 |
| 25 | 6,304.13 |
| 50 | 12,608.3 |
| 100 | 25,216.5 |
| 250 | 63,041.3 |
| 500 | 126,083 |
| 1,000 | 252,165 |
Frequently asked
How many calories are in a btu?
1 btu equals 252.165 calories (cal).
How do I convert btu to calories?
Multiply the number of btu by 252.165 to get calories.
What is 10 btu in calories?
10 BTU equals 2,522 cal.
What is 100 btu in calories?
100 BTU equals 2.522e+4 cal.
How do I convert calories back to btu?
Multiply calories by 0.00396565 (the reciprocal) or use the swap button above.
Where you'll actually use this
Energy converters bridge joules, calories, kilowatt-hours, BTUs, and electron-volts — the same physical quantity expressed for science, nutrition, electricity, or HVAC.
- Electricity bills
Usage is billed in kWh. Convert to joules for physics, or to BTU for HVAC comparisons.
- Nutrition
Food 'calories' are actually kilocalories (kcal). 1 kcal = 4,184 J. EU labels list both kcal and kJ.
- HVAC & cooling
Air conditioner output is quoted in BTU/h in the US, watts elsewhere.
Common mistakes to avoid
- Calories vs kilocalories
When a food label says '250 calories' it really means 250 kcal = 250,000 small calories.
- kW vs kWh
kW is power (rate); kWh is energy (total). A 1 kW heater running for 2 hours uses 2 kWh.
Did you know?
A typical modern fridge uses about 1 kWh per 24 hours — roughly $0.10–$0.30 depending on local rates.
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