Energy
Convert calorie (cal) to British thermal unit (BTU). Energy is the capacity to do work or transfer heat — the currency of every heat and material balance.
1 cal = 0.003965667 BTU
To convert calorie to British thermal unit, multiply the cal value by 0.003965667. To go the other way, divide by 0.003965667 (or multiply by 252.1644).
| cal | BTU |
|---|---|
| 1 | 0.003965667 |
| 2 | 0.007931334 |
| 5 | 0.01982833 |
| 10 | 0.03965667 |
| 25 | 0.09914167 |
| 50 | 0.1982833 |
| 100 | 0.3965667 |
| 250 | 0.9914167 |
| 500 | 1.982833 |
| 1000 | 3.965667 |
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 860420.7 cal is 3412.142 BTU.
Multiply the value in cal by 0.003965667 to get BTU. For example, 10 cal = 0.03965667 BTU.
1 cal equals 0.003965667 BTU.
Heat duties integrate to energy in kJ, MJ, or BTU; utilities are billed in kWh or MMBTU.