Convert Calories to BTU
1 cal = 0.00396565 BTU
Conversion Table
| calories (cal) | BTU (BTU) |
|---|---|
| 0.5 | 0.00198283 |
| 1 | 0.00396565 |
| 2 | 0.0079313 |
| 5 | 0.0198283 |
| 10 | 0.0396565 |
| 25 | 0.0991413 |
| 50 | 0.198283 |
| 100 | 0.396565 |
| 250 | 0.991413 |
| 500 | 1.9828 |
| 1000 | 3.9657 |
How to Convert calories to BTU
To convert calories to BTU, multiply the value by the conversion factor:
For example: 10 cal = 0.0396565 BTU
About calories and BTU
The Conversion Formula
To convert calories to BTU, multiply the value by the conversion factor: 1 cal = 0.00396565 BTU. For a worked example, suppose you need to convert 25 cal to BTU: 25 × 0.00396565 = 0.0991413 BTU. To convert in the opposite direction, divide by 0.00396565, or equivalently multiply by 252.17.
About calories
The calorie (lowercase c) was originally defined as the heat required to raise 1 gram of water by 1°C. It is a tiny unit, often called the 'gram calorie'. It is mostly used in chemistry and physics today, not for food. calories are commonly used in Chemistry experiments, Thermodynamics, Specific heat capacity, and Physics problems.
Heating 1 gram of water by 1°C takes 1 calorie.
About BTU
The British Thermal Unit (BTU) is the imperial counterpart to the calorie. It is the heat needed to raise 1 pound of water by 1°F. Despite its name, it is almost exclusively used in the United States today, particularly for heating (furnaces) and cooling (air conditioners). BTU are commonly used in AC unit ratings, Gas grills, Furnaces, and Water heaters, Propane tanks.
Burning a single wooden match releases about 1 BTU.
When Would You Convert calories to BTU?
Converting between calories and btu is one of the most common energy conversions. You might need this conversion when working with international specifications, following instructions written for a different measurement system, or comparing values across different standards. Having the conversion factor (1 cal = 0.00396565 BTU) memorized or bookmarked can save time in professional and everyday contexts alike.