Calories to Therms: 1 cal equals 3.96565e-8 therm. To convert calories to therms, multiply by 3.96565e-8 (therm = cal × 3.9657e-8). For example, 10 cal = 3.96565e-7 therm.
How to Convert Calories to Therms
To convert from calories to therms, multiply the value by 3.96565e-8. The conversion is linear, meaning doubling the input doubles the output.
Conversion Formula
- Calories to Therms:
therm = cal × 3.9657e-8 - Therms to Calories:
cal = therm ÷ 3.9657e-8
Calories to Therms Conversion Chart
| Calories (cal) | Therms (therm) |
|---|---|
| 0.1 | 3.96565e-9 |
| 0.25 | 9.91413e-9 |
| 0.5 | 1.98283e-8 |
| 1 | 3.96565e-8 |
| 2 | 7.93130e-8 |
| 3 | 1.18970e-7 |
| 5 | 1.98283e-7 |
| 10 | 3.96565e-7 |
| 20 | 7.93130e-7 |
| 25 | 9.91413e-7 |
| 50 | 1.98283e-6 |
| 100 | 3.96565e-6 |
| 250 | 9.91413e-6 |
| 1000 | 3.96565e-5 |
Understanding the Units
What is a Calorie?
The thermochemical calorie equals exactly 4.184 joules; the historical "small" calorie raised one gram of water by one degree Celsius.
Common contexts: chemistry, historical thermodynamics.
What is a Therm?
A therm equals exactly 100,000 BTU, or about 105.5 megajoules — the standard unit for retail natural gas in the US and UK.
Common contexts: natural gas billing.