Energy
Convert British thermal unit (BTU) to calorie (cal). Energy is the capacity to do work or transfer heat — the currency of every heat and material balance.
1 BTU = 252.1644 cal
To convert British thermal unit to calorie, multiply the BTU value by 252.1644. To go the other way, divide by 252.1644 (or multiply by 0.003965667).
| BTU | cal |
|---|---|
| 1 | 252.1644 |
| 2 | 504.3288 |
| 5 | 1260.822 |
| 10 | 2521.644 |
| 25 | 6304.11 |
| 50 | 12608.22 |
| 100 | 25216.44 |
| 250 | 63041.1 |
| 500 | 126082.2 |
| 1000 | 252164.4 |
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 860420.7 cal.
Multiply the value in BTU by 252.1644 to get cal. For example, 10 BTU = 2521.644 cal.
1 BTU equals 252.1644 cal.
Heat duties integrate to energy in kJ, MJ, or BTU; utilities are billed in kWh or MMBTU.