Horsepower-Hour to BTU (th) Converter

Energy Converter

27 units available

Decimals:

From

To

2,546.136992

1 hp·h = 2,546.136992 BTU

Formula:

BTU = hp·h × 2,546.1369921753

With your value: 1 hp·h = 2,546.13699218 BTU

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 BTU (th) conversions

2 hp·h to BTU 3 hp·h to BTU 4 hp·h to BTU 5 hp·h to BTU 6 hp·h to BTU 7 hp·h to BTU 8 hp·h to BTU

Horsepower-Hour to BTU (th) Conversion Table

Horsepower-Hour (hp·h)	BTU (th) (BTU)
0.5	1,273.068496
1	2,546.136992
2	5,092.273984
5	12,730.684961
10	25,461.369922
15	38,192.054883
20	50,922.739844
25	63,653.424804
50	127,306.849609
100	254,613.699218
250	636,534.248044
500	1,273,068.496088
1000	2,546,136.992175

BTU (th) to Horsepower-Hour Conversion Table

BTU (th) (BTU)	Horsepower-Hour (hp·h)
0.5	0.000196
1	0.000393
2	0.000786
5	0.001964
10	0.003928
15	0.005891
20	0.007855
25	0.009819
50	0.019638
100	0.039275
250	0.098188
500	0.196376
1000	0.392752

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

BTU (th) (BTU)

Energy

Exact conversion

The International Table BTU is exactly 1055.055 852 62 J.

Thermochemical and 39 °F BTU definitions differ by up to 0.2 %.

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 BTU (th)

To convert from Horsepower-Hour (hp·h) to BTU (th) (BTU), multiply the value by 2,546.1369921753.

Formula: BTU = hp·h × 2,546.1369921753

Reverse: hp·h = BTU × 0.0003927518

Step-by-Step Example

Start with your value in Horsepower-Hour. For example: 5 hp·h
Multiply by the conversion factor: 5 x 2,546.1369921753
The result is: 12,730.684961 BTU

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 BTU (th)

The btu (th) (BTU) is a unit of energy and work. One btu (th) equals 1054.35 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 BTU (th) are in 1 Horsepower-Hour?

There are exactly 2,546.1369921753 BTU (th) in 1 Horsepower-Hour. This means the conversion factor from Horsepower-Hour to BTU (th) is 2,546.1369921753.

What is the formula to convert Horsepower-Hour to BTU (th)?

The formula to convert Horsepower-Hour to BTU (th) is: BTU = hp·h × 2,546.1369921753. For example, to convert 10 Horsepower-Hour to BTU (th), you would multiply 10 by 2,546.1369921753.

What is a Horsepower-Hour?