British thermal units (IT) to Thermochemical kilocalories
1 BTU ≈ 0.2522 kcal. Edit either value to convert instantly.
Conversion formula
kcal = BTU × (1,055.05585262) × (1 / 4,184)1 BTU ≈ 0.252164 kcal
British thermal unit (IT) (BTU)
British thermal unit (IT) is a unit of energy: 1 BTU = 1,055.05585262 J. Uses the International Table definition (IT), not the thermochemical BTU.
Source: NBSIR 81-2401, Appendix A3.2: International Table British thermal unit
thermochemical kilocalorie (kcal)
Thermochemical kilocalorie is a unit of energy: 1 kcal = 4,184 J. A food Calorie means 1 kcal, equal to 1,000 thermochemical calories.
Source: NIST SP 811, Appendix B.9: conversion factors by quantity
Conversion table
| BTU | kcal |
|---|---|
| ≈ 0.252164 | |
| ≈ 0.504329 | |
| ≈ 1.26082 | |
| ≈ 2.52164 | |
| ≈ 3.78247 | |
| ≈ 5.04329 | |
| ≈ 6.30411 | |
| ≈ 7.56493 | |
| ≈ 10.0866 | |
| ≈ 11.3474 |
| BTU | kcal |
|---|---|
| ≈ 12.6082 | |
| ≈ 15.1299 | |
| ≈ 17.6515 | |
| ≈ 20.1732 | |
| ≈ 22.6948 | |
| ≈ 25.2164 | |
| ≈ 37.8247 | |
| ≈ 40.3463 | |
| ≈ 42.8679 | |
| ≈ 45.3896 |
Frequently asked questions
How many thermochemical kilocalories are in 1 British thermal unit (IT)?
1 BTU ≈ 0.2522 kcal. kcal = BTU × (1,055.05585262) × (1 / 4,184)
How do I convert BTU to kcal?
kcal = BTU × (1,055.05585262) × (1 / 4,184)
Is 1 British thermal unit (IT) bigger than 1 thermochemical kilocalorie?
1 BTU ≈ 0.2522 kcal.
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