British thermal units to calories
1 BTU = 252.1644 cal
All units in this category
- 1,055.0559J
- 1.0550559kJ
- 0.0010550559MJ
- 252.1644cal
- 0.2521644kcal
- 0.29307107Wh
- 0.00029307107kWh
- 2.9307107E-7MWh
- 1BTU
- 778.16926ft·lb
- 6.5851407E21eV
Formula
Multiply the value in British thermal units by 252.1644 to get calories.
cal = BTU × 252.1644
How to convert British thermal units to calories
Type a value in the field above and the result is calculated instantly. Use the arrow button to swap direction, or pick other units from the lists.
British thermal units to calories – common values
| British thermal units (BTU) | Calories (cal) |
|---|---|
| 1 | 252.164 |
| 2 | 504.329 |
| 5 | 1,260.82 |
| 10 | 2,521.64 |
| 20 | 5,043.29 |
| 50 | 12,608.2 |
| 100 | 25,216.4 |
| 250 | 63,041.1 |
| 500 | 126,082 |
| 1,000 | 252,164 |
About the units
British thermal units. The British thermal unit is used in the US for heating and cooling systems.
Calories. A calorie is the energy needed to heat one gram of water by one degree. Food "calories" are actually kilocalories.