Power and Energy
kcal/hrtocal/s
Convert kilocalories per hour (kcal/hr) to calories per second (cal/s).
Factor1 kcal/hr = 0.2779637 cal/s
Converter
kcal/hr
Accepts numbers or expressions, e.g. 150 + 14.7
Result
cal/s
Rendered to 6 significant figures.
Formula
Formula
cal/s = kcal/hr × 0.2779637
Multiply any value in kilocalories per hour by 0.2779637 to obtain the value in calories per second.
Worked example
Convert 100 kcal/hr to cal/s.
- 01Start with 100 kcal/hr.
- 02Multiply by the conversion factor: 100 × 0.2779637 = 27.7964 cal/s.
Result100 kcal/hr = 27.7964 cal/s
Conversion table
| kcal/hr | cal/s |
|---|---|
| 1 | 0.27796 |
| 2 | 0.55593 |
| 5 | 1.3898 |
| 10 | 2.7796 |
| 20 | 5.5593 |
| 50 | 13.898 |
| 100 | 27.796 |
| 200 | 55.593 |
| 500 | 138.98 |
| 1000 | 277.96 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kcal/hr to cal/s?
1 kcal/hr equals 0.2779637 cal/s. To convert, multiply the value in kilocalories per hour by 0.2779637.
How do I convert 1 kcal/hr to cal/s?
1 kcal/hr = 0.277964 cal/s. For any value, multiply by 0.2779637.
How do I convert cal/s back to kcal/hr?
Divide by the same factor — or equivalently, multiply by 3.597592. So 1 cal/s = 3.59759 kcal/hr.
When would I need to convert kilocalorie 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).