Power and Energy
J/stocal/s
Convert joules per second (J/s) to calories per second (cal/s).
Factor1 J/s = 0.2390057 cal/s
Converter
J/s
Accepts numbers or expressions, e.g. 150 + 14.7
Result
cal/s
Rendered to 6 significant figures.
Formula
Formula
cal/s = J/s × 0.2390057
Multiply any value in joules per second by 0.2390057 to obtain the value in calories per second.
Worked example
Convert 100 J/s to cal/s.
- 01Start with 100 J/s.
- 02Multiply by the conversion factor: 100 × 0.2390057 = 23.9006 cal/s.
Result100 J/s = 23.9006 cal/s
Conversion table
| J/s | cal/s |
|---|---|
| 1 | 0.23901 |
| 2 | 0.47801 |
| 5 | 1.195 |
| 10 | 2.3901 |
| 20 | 4.7801 |
| 50 | 11.95 |
| 100 | 23.901 |
| 200 | 47.801 |
| 500 | 119.5 |
| 1000 | 239.01 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from J/s to cal/s?
1 J/s equals 0.2390057 cal/s. To convert, multiply the value in joules per second by 0.2390057.
How do I convert 1 J/s to cal/s?
1 J/s = 0.239006 cal/s. For any value, multiply by 0.2390057.
How do I convert cal/s back to J/s?
Divide by the same factor — or equivalently, multiply by 4.184. So 1 cal/s = 4.184 J/s.
When would I need to convert joule 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).