Convert Electrical Horsepower to Kilocalories per Hour
Convert Electrical Horsepower (hp(E)) to Kilocalories per Hour (kcal/h) instantly and accurately.
Conversion Formula
kcal/h = hp(E) × 641.44454
About Electrical Horsepower
The electrical horsepower (hp(E)) is defined as exactly 746 W - the US NEMA rounding used on electric motor nameplates. It differs from mechanical hp (745.7 W) by only 0.04%. Every NEMA-rated motor in the US carries a horsepower nameplate: a '5 hp motor' delivers 5 × 746 = 3,730 W. NEC motor branch-circuit sizing tables, overload relay selection, and starter ratings are all based on hp(E). Despite global kW adoption, US industrial motor infrastructure remains standardised in electrical horsepower. 1 hp(E) = 746 W.
About Kilocalories per Hour
One kilocalorie per hour (kcal/h) equals exactly 1.163 W. It is the natural unit for human metabolic rate: sedentary adult ~60-70 kcal/h; walking 250-350 kcal/h; vigorous cycling 500-700 kcal/h; competitive rowing ~1,200 kcal/h. Treadmills and exercise bikes display kcal/h directly. Industrial drying and evaporation calcs in older metric systems (especially Asia) used kcal/h for heat duty; 1 Mcal/h = 1.163 kW. 1 kcal/h = 1.163 W.
Quick Reference Table
| Electrical Horsepower (hp(E)) | Kilocalories per Hour (kcal/h) |
|---|---|
| 1 hp(E) | 641.445 kcal/h |
| 2 hp(E) | 1282.89 kcal/h |
| 5 hp(E) | 3207.22 kcal/h |
| 10 hp(E) | 6414.45 kcal/h |
| 25 hp(E) | 16036.1 kcal/h |
| 50 hp(E) | 32072.2 kcal/h |
| 100 hp(E) | 64144.5 kcal/h |