International Table BTU to thermochemical kilocalorie
Convert International Table BTU (BTU IT) to thermochemical kilocalorie (kcal). Use an editable energy converter, conversion formula, and reference table.
1 BTU IT = 0.2521644007 kcal
Conversion formula
One International Table BTU equals 0.2521644007 thermochemical kilocalorie. Multiply your value in International Table BTU by this factor to get thermochemical kilocalorie. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 International Table BTU:5 × 0.2521644007 = 1.260822004 kcal
Conversion table
| International Table BTU (BTU IT) | thermochemical kilocalorie (kcal) |
|---|---|
| 0.01 | 0.002521644007 |
| 0.1 | 0.02521644007 |
| 1 | 0.2521644007 |
| 2 | 0.5043288014 |
| 5 | 1.260822004 |
| 10 | 2.521644007 |
| 25 | 6.304110018 |
| 50 | 12.60822004 |
| 100 | 25.21644007 |
| 1000 | 252.1644007 |
About these measurements
Energy can be transferred through work, heating, or electrical processes.
The base reference used here is the joule. One International Table BTU is 1,055.055853 base units; one thermochemical kilocalorie is 4,184 base units.
Important distinctions
Calorie and BTU definitions vary. These pages label thermochemical calories and International Table BTUs explicitly.
Precision
The converter uses stored conversion factors and floating-point arithmetic. Results display up to ten significant digits, switching to scientific notation for very small or large values. Keep the precision of your original measurement when reporting results.
Common questions
How do I convert BTU IT to kcal?
Multiply the quantity in BTU IT by 0.2521644007. You can also type the value into the converter above.
Can I reverse the conversion?
Yes. Use the swap button or open the thermochemical kilocalorie to International Table BTU converter.
Reference
NIST Guide to the SI — conversion factors and prefix conventions. SI prefixes scale units by powers of ten; the dimension-specific notes above describe the assumptions used on this page.
