Energy conversion
1 btu (international table) (BTUₕᵀ) equals 252.164400721797 thermochemical calorie (cal). Enter any value below to convert from BTUₕᵀ to cal.
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1 BTUₕᵀ = 252.1644007218 cal
| Unit | Value |
|---|---|
| Joule J | 1,055.05585262 |
| Kilojoule kJ | 1.0550558526 |
| Thermochemical calorie cal | 252.1644007218 |
| Kilocalorie kcal | 0.2521644007 |
| Watt-hour Wh | 0.2930710702 |
| Kilowatt-hour kWh | 0.0002930711 |
| BTU (International Table) BTUₕᵀ | 1 |
| Foot-pound ft·lb | 778.169262266 |
| Electronvolt eV | 6.5851406782e21 |
Formula
Use this relationship for a direct conversion:
2 BTUₕᵀ = 504.3288014436 cal.
The thermochemical calorie and International Table BTU are named explicitly to avoid ambiguous legacy definitions.
Quick reference
| BTU (International Table) (BTUₕᵀ) | Thermochemical calorie (cal) |
|---|---|
| 0.01 | 2.5216440072 |
| 0.1 | 25.2164400722 |
| 1 | 252.1644007218 |
| 2 | 504.3288014436 |
| 5 | 1,260.822003609 |
| 10 | 2,521.644007218 |
| 25 | 6,304.1100180449 |
| 50 | 12,608.2200360899 |
| 100 | 25,216.4400721797 |
| 1,000 | 252,164.4007217973 |
From unit
The International Table British thermal unit.
Symbol: BTUₕᵀ
To unit
Exactly 4.184 joules.
Symbol: cal
Keep converting
Source
Definitions are checked against NIST SP 811: Energy units. Calculations use full internal precision before display rounding.
View the complete energy converterQuestions
Use the formula cal = BTUₕᵀ x 252.164400721797. 1 btu (international table) (BTUₕᵀ) equals 252.164400721797 thermochemical calorie (cal).
The thermochemical calorie and International Table BTU are named explicitly to avoid ambiguous legacy definitions.
