Power

hp to kcal/h conversion

Convert mechanical horsepower (hp) to kilocalorie per hour (kcal/h). Power is energy per unit time — the rating of pumps, compressors, motors, and heat duties.

1 hp = 641.1865 kcal/h

Formula

To convert mechanical horsepower to kilocalorie per hour, multiply the hp value by 641.1865. To go the other way, divide by 641.1865 (or multiply by 0.001559609).

hp to kcal/h conversion table

hp	kcal/h
1	641.1865
2	1282.373
5	3205.932
10	6411.865
25	16029.66
50	32059.32
100	64118.65
250	160296.6
500	320593.2
1000	641186.5

Used in practice

Rotating-equipment duties are quoted in kW or hp; heat duties in kW, MW, or BTU/hr.

Electrical input, shaft power, and hydraulic power differ by the efficiencies between them — label which one a number refers to.

Worked example. A power of 134.1022 hp is 85984.52 kcal/h.

Frequently asked questions

How do you convert mechanical horsepower to kilocalorie per hour?

Multiply the value in hp by 641.1865 to get kcal/h. For example, 10 hp = 6411.865 kcal/h.

What is 1 hp in kcal/h?

1 hp equals 641.1865 kcal/h.

Where is this conversion used?