Power and Energy
BTU/hrtocal/s
Convert British thermal units per hour (BTU/hr) to calories per second (cal/s).
Factor1 BTU/hr = 0.07004567 cal/s
Converter
BTU/hr
Accepts numbers or expressions, e.g. 150 + 14.7
Result
cal/s
Rendered to 6 significant figures.
Formula
Formula
cal/s = BTU/hr × 0.07004567
Multiply any value in British thermal units per hour by 0.07004567 to obtain the value in calories per second.
Worked example
Convert 1000 BTU/hr to cal/s.
- 01Start with 1000 BTU/hr.
- 02Multiply by the conversion factor: 1000 × 0.07004567 = 70.0457 cal/s.
Result1000 BTU/hr = 70.0457 cal/s
Conversion table
| BTU/hr | cal/s |
|---|---|
| 1 | 0.070046 |
| 2 | 0.14009 |
| 5 | 0.35023 |
| 10 | 0.70046 |
| 20 | 1.4009 |
| 50 | 3.5023 |
| 100 | 7.0046 |
| 200 | 14.009 |
| 500 | 35.023 |
| 1000 | 70.046 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from BTU/hr to cal/s?
1 BTU/hr equals 0.07004567 cal/s. To convert, multiply the value in British thermal units per hour by 0.07004567.
How do I convert 1 BTU/hr to cal/s?
1 BTU/hr = 0.0700457 cal/s. For any value, multiply by 0.07004567.
How do I convert cal/s back to BTU/hr?
Divide by the same factor — or equivalently, multiply by 14.2764. So 1 cal/s = 14.2764 BTU/hr.
When would I need to convert British thermal unit per hour 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).