21 Calories to BTU
Convert 21 calories (cal) to btu (BTU) with formulas, examples, and conversion tables.
cal
BTU
21 calories (cal) = 0.0832786760943 btu (BTU)
Round to:
Step-by-Step Solution
1Write the conversion factor:
1 british thermal unit = 252.165391969 calories
2Divide the value by the conversion factor:
21 ÷ 252.165391969 = 0.0832786760943
3Result:
21 calories (cal) = 0.0832786760943 btu (BTU)
Calories to BTU Conversion Table
| Calories | BTU |
|---|---|
| 1 cal | 0.00396565 BTU |
| 2 cal | 0.0079313 BTU |
| 3 cal | 0.011897 BTU |
| 4 cal | 0.0158626 BTU |
| 5 cal | 0.0198283 BTU |
| 10 cal | 0.0396565 BTU |
| 20 cal | 0.079313 BTU |
| 21 cal | 0.0832787 BTU |
| 50 cal | 0.198283 BTU |
| 100 cal | 0.396565 BTU |
21 Calories in Other Units
| Unit | 21 cal = |
|---|---|
| Calories to Joules | 87.864 J |
| Calories to Kilojoules | 0.087864 kJ |
| Calories to Megajoules | 8.7864e-5 MJ |
| Calories to Gigajoules | 8.7864e-8 GJ |
| Calories to Watt-hours | 0.0244066666667 Wh |
| Calories to Kilowatt-hours | 2.44066666667e-5 kWh |
| Calories to Megawatt-hours | 2.44066666667e-8 MWh |
| Calories to Kilocalories | 0.021 kcal |
| Calories to BTU | 0.0832786760943 BTU |
| Calories to Therms | 8.32790034608e-7 therm |
| Calories to Foot-pounds | 64.8050626189 ft·lb |
| Calories to Electronvolts | 5.48402801183e20 eV |
| Calories to Ergs | 878640000 erg |