Energy
Convert kilocalorie (kcal) to British thermal unit (BTU). Energy is the capacity to do work or transfer heat — the currency of every heat and material balance.
1 kcal = 3.965667 BTU
To convert kilocalorie to British thermal unit, multiply the kcal value by 3.965667. To go the other way, divide by 3.965667 (or multiply by 0.2521644).
| kcal | BTU |
|---|---|
| 1 | 3.965667 |
| 2 | 7.931334 |
| 5 | 19.82833 |
| 10 | 39.65667 |
| 25 | 99.14167 |
| 50 | 198.2833 |
| 100 | 396.5667 |
| 250 | 991.4167 |
| 500 | 1982.833 |
| 1000 | 3965.667 |
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 860.4207 kcal is 3412.142 BTU.
Multiply the value in kcal by 3.965667 to get BTU. For example, 10 kcal = 39.65667 BTU.
1 kcal equals 3.965667 BTU.
Heat duties integrate to energy in kJ, MJ, or BTU; utilities are billed in kWh or MMBTU.