Thermochemical calories to British thermal units (IT)
Convert thermochemical calories to british thermal units (it) (cal to BTU). 1 cal = 0.00396566683139 BTU. Use the calculator, formula and conversion table.
How to convert thermochemical calories to british thermal units (it)
Multiply the amount in thermochemical calories by 0.00396566683139 to get british thermal units (it). The displayed factor and results are rounded to 12 significant digits.
BTU = cal × 0.00396566683139Worked example
1 cal = 0.00396566683139 BTU. Change the amount in the calculator above to use your own value.
Units and assumptions
A watt-hour is 3,600 joules. Calories use the thermochemical definition (4.184 J); BTU uses the International Table definition.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
Thermochemical calories to British thermal units (IT) table
| Thermochemical calories (cal) | British thermal units (IT) (BTU) |
|---|---|
| 0 | 0 |
| 1 | 0.00396566683139 |
| 5 | 0.019828334157 |
| 10 | 0.0396566683139 |
| 25 | 0.0991416707848 |
| 100 | 0.396566683139 |
| 1,000 | 3.96566683139 |
About this conversion
What is the formula for thermochemical calories to british thermal units (it)?
BTU = cal × 0.00396566683139. Multiply the amount in thermochemical calories by 0.00396566683139 to get british thermal units (it). The displayed factor and results are rounded to 12 significant digits.
How do I convert back to thermochemical calories?
Use the british thermal units (it) to thermochemical calories calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the energy converter to browse all supported pairs.