Horsepower (Mech) to Kilocalorie/Hour Converter

Power Converter

22 units available

Decimals:

From

To

641.615568

1 hp = 641.615568 kcal/h

Formula:

kcal/h = hp × 641.6155684057

With your value: 1 hp = 641.61556841 kcal/h

How big is that?

Everyday references on a logarithmic scale, all expressed in horsepower (mech) so you can sanity-check the result.

LED bulb (1/83 your value)0.0121 hp

Laptop (1/11 your value)0.0872 hp

Your value1.00 hp

Microwave oven (1.3× your value)1.34 hp

Electric kettle (4.0× your value)4.02 hp

Family car engine (1.2e+2× your value)121 hp

Other Horsepower (Mech) to Kilocalorie/Hour conversions

2 hp to kcal/h 3 hp to kcal/h 4 hp to kcal/h 5 hp to kcal/h 6 hp to kcal/h 7 hp to kcal/h 8 hp to kcal/h

Horsepower (Mech) to Kilocalorie/Hour Conversion Table

Horsepower (Mech) (hp)	Kilocalorie/Hour (kcal/h)
0.5	320.807784
1	641.615568
2	1,283.231137
5	3,208.077842
10	6,416.155684
15	9,624.233526
20	12,832.311368
25	16,040.38921
50	32,080.77842
100	64,161.556841
250	160,403.892101
500	320,807.784203
1000	641,615.568406

Kilocalorie/Hour to Horsepower (Mech) Conversion Table

Kilocalorie/Hour (kcal/h)	Horsepower (Mech) (hp)
0.5	0.000779
1	0.001559
2	0.003117
5	0.007793
10	0.015586
15	0.023378
20	0.031171
25	0.038964
50	0.077928
100	0.155857
250	0.389641
500	0.779283
1000	1.558566

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Horsepower (Mech) (hp)

Power

Exact conversion

Mechanical horsepower is exactly 550 ft·lbf/s = 745.699 871 582 270 22 W.

Metric horsepower (PS) is 735.498 75 W — about 1.4 % lower.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Kilocalorie/Hour (kcal/h)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Horsepower (Mech) to Kilocalorie/Hour

To convert from Horsepower (Mech) (hp) to Kilocalorie/Hour (kcal/h), multiply the value by 641.6155684057.

Formula: kcal/h = hp × 641.6155684057

Reverse: hp = kcal/h × 0.0015585657

Step-by-Step Example

Start with your value in Horsepower (Mech). For example: 5 hp
Multiply by the conversion factor: 5 x 641.6155684057
The result is: 3,208.077842 kcal/h

About Horsepower (Mech)

The horsepower (mech) (hp) is a unit of power. One horsepower (mech) equals 745.6998716 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

About Kilocalorie/Hour

The kilocalorie/hour (kcal/h) is a unit of power. One kilocalorie/hour equals 1.162222222 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

Frequently Asked Questions

How many Kilocalorie/Hour are in 1 Horsepower (Mech)?

There are exactly 641.6155684057 Kilocalorie/Hour in 1 Horsepower (Mech). This means the conversion factor from Horsepower (Mech) to Kilocalorie/Hour is 641.6155684057.

What is the formula to convert Horsepower (Mech) to Kilocalorie/Hour?

The formula to convert Horsepower (Mech) to Kilocalorie/Hour is: kcal/h = hp × 641.6155684057. For example, to convert 10 Horsepower (Mech) to Kilocalorie/Hour, you would multiply 10 by 641.6155684057.

What is a Horsepower (Mech)?