Power and Energy
hptocal/s
Convert mechanical horsepower (hp) to calories per second (cal/s).
Factor1 hp = 178.2265 cal/s
Converter
hp
Accepts numbers or expressions, e.g. 150 + 14.7
Result
cal/s
Rendered to 6 significant figures.
Formula
Formula
cal/s = hp × 178.2265
Multiply any value in mechanical horsepower by 178.2265 to obtain the value in calories per second.
Worked example
Convert 1 hp to cal/s.
- 01Start with 1 hp.
- 02Multiply by the conversion factor: 1 × 178.2265 = 178.227 cal/s.
Result1 hp = 178.227 cal/s
Conversion table
| hp | cal/s |
|---|---|
| 1 | 178.23 |
| 2 | 356.45 |
| 5 | 891.13 |
| 10 | 1782.3 |
| 20 | 3564.5 |
| 50 | 8911.3 |
| 100 | 17823 |
| 200 | 35645 |
| 500 | 89113 |
| 1000 | 1.7823e+5 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from hp to cal/s?
1 hp equals 178.2265 cal/s. To convert, multiply the value in mechanical horsepower by 178.2265.
How do I convert 1 hp to cal/s?
1 hp = 178.227 cal/s. For any value, multiply by 178.2265.
How do I convert cal/s back to hp?
Divide by the same factor — or equivalently, multiply by 0.005610836. So 1 cal/s = 0.00561084 hp.
When would I need to convert mechanical horsepower 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).