Energy
Convert British thermal unit (BTU) to kilocalorie (kcal). Energy is the capacity to do work or transfer heat — the currency of every heat and material balance.
1 BTU = 0.2521644 kcal
To convert British thermal unit to kilocalorie, multiply the BTU value by 0.2521644. To go the other way, divide by 0.2521644 (or multiply by 3.965667).
| BTU | kcal |
|---|---|
| 1 | 0.2521644 |
| 2 | 0.5043288 |
| 5 | 1.260822 |
| 10 | 2.521644 |
| 25 | 6.30411 |
| 50 | 12.60822 |
| 100 | 25.21644 |
| 250 | 63.0411 |
| 500 | 126.0822 |
| 1000 | 252.1644 |
Heat duties integrate to energy in kJ, MJ, or BTU; utilities are billed in kWh or MMBTU.
A calorie, a BTU, and a joule are all energy — keep the conversion factors handy when a spec mixes them.
Worked example. A energy of 3412.142 BTU is 860.4207 kcal.
Multiply the value in BTU by 0.2521644 to get kcal. For example, 10 BTU = 2.521644 kcal.
1 BTU equals 0.2521644 kcal.
Heat duties integrate to energy in kJ, MJ, or BTU; utilities are billed in kWh or MMBTU.