Power and Energy
BTU/stocal/s
Convert British thermal units per second (BTU/s) to calories per second (cal/s).
Factor1 BTU/s = 252.1644 cal/s
Converter
BTU/s
Accepts numbers or expressions, e.g. 150 + 14.7
Result
cal/s
Rendered to 6 significant figures.
Formula
Formula
cal/s = BTU/s × 252.1644
Multiply any value in British thermal units per second by 252.1644 to obtain the value in calories per second.
Worked example
Convert 1 BTU/s to cal/s.
- 01Start with 1 BTU/s.
- 02Multiply by the conversion factor: 1 × 252.1644 = 252.164 cal/s.
Result1 BTU/s = 252.164 cal/s
Conversion table
| BTU/s | cal/s |
|---|---|
| 1 | 252.16 |
| 2 | 504.33 |
| 5 | 1260.8 |
| 10 | 2521.6 |
| 20 | 5043.3 |
| 50 | 12608 |
| 100 | 25216 |
| 200 | 50433 |
| 500 | 1.2608e+5 |
| 1000 | 2.5216e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from BTU/s to cal/s?
1 BTU/s equals 252.1644 cal/s. To convert, multiply the value in British thermal units per second by 252.1644.
How do I convert 1 BTU/s to cal/s?
1 BTU/s = 252.164 cal/s. For any value, multiply by 252.1644.
How do I convert cal/s back to BTU/s?
Divide by the same factor — or equivalently, multiply by 0.003965667. So 1 cal/s = 0.00396567 BTU/s.
When would I need to convert British thermal unit per second to calorie per second?
Power conversions are common when comparing motor ratings (often kW or hp), thermal duty (BTU/hr or kW), and utility consumption in mixed-unit projects.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).