Horsepower-Hour to Calorie (IT) Converter

Energy Converter

27 units available

Decimals:

From

To

641,186.475996

1 hp·h = 641,186.475996 cal (IT)

Formula:

cal (IT) = hp·h × 641,186.4759959874

With your value: 1 hp·h = 641,186.47599599 cal (IT)

How big is that?

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

Heartbeat (1/2.7e+6 your value)3.73e-7 hp·h

AA battery charge (1/2.7e+2 your value)0.00373 hp·h

Slice of bread (1/9.6 your value)0.104 hp·h

Your value1.00 hp·h

Daily food intake (3.1× your value)3.13 hp·h

Litre of petrol (13× your value)12.7 hp·h

Other Horsepower-Hour to Calorie (IT) conversions

2 hp·h to cal (IT)3 hp·h to cal (IT)4 hp·h to cal (IT)5 hp·h to cal (IT)6 hp·h to cal (IT)7 hp·h to cal (IT)8 hp·h to cal (IT)

Horsepower-Hour to Calorie (IT) Conversion Table

Horsepower-Hour (hp·h)	Calorie (IT) (cal (IT))
0.5	320,593.237998
1	641,186.475996
2	1,282,372.951992
5	3,205,932.37998
10	6,411,864.75996
15	9,617,797.13994
20	12,823,729.51992
25	16,029,661.8999
50	32,059,323.799799
100	64,118,647.599599
250	160,296,618.998997
500	320,593,237.997994
1000	641,186,475.995988

Calorie (IT) to Horsepower-Hour Conversion Table

Calorie (IT) (cal (IT))	Horsepower-Hour (hp·h)
0.5	7.798043e-7
1	1.559609e-6
2	3.119217e-6
5	7.798043e-6
10	1.559609e-5
15	2.339413e-5
20	3.119217e-5
25	3.899022e-5
50	7.798043e-5
100	0.000156
250	0.00039
500	0.00078
1000	0.00156

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-Hour (hp·h)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

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

Calorie (IT) (cal (IT))

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

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-Hour to Calorie (IT)

To convert from Horsepower-Hour (hp·h) to Calorie (IT) (cal (IT)), multiply the value by 641,186.4759959874.

Formula: cal (IT) = hp·h × 641,186.4759959874

Reverse: hp·h = cal (IT) × 0.0000015596

Step-by-Step Example

Start with your value in Horsepower-Hour. For example: 5 hp·h
Multiply by the conversion factor: 5 x 641,186.4759959874
The result is: 3,205,932.37998 cal (IT)

About Horsepower-Hour

The horsepower-hour (hp·h) is a unit of energy and work. One horsepower-hour equals 2.684520 × 10^+6 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

About Calorie (IT)

The calorie (it) (cal (IT)) is a unit of energy and work. One calorie (it) equals 4.1868 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

Frequently Asked Questions

How many Calorie (IT) are in 1 Horsepower-Hour?

There are exactly 641,186.4759959874 Calorie (IT) in 1 Horsepower-Hour. This means the conversion factor from Horsepower-Hour to Calorie (IT) is 641,186.4759959874.

What is the formula to convert Horsepower-Hour to Calorie (IT)?

The formula to convert Horsepower-Hour to Calorie (IT) is: cal (IT) = hp·h × 641,186.4759959874. For example, to convert 10 Horsepower-Hour to Calorie (IT), you would multiply 10 by 641,186.4759959874.

What is a Horsepower-Hour?