Convert mechanical horsepower to BTU per hour

1 hp=2,544.43BTU/h

Use the converter below to change any mechanical horsepower value into BTU per hour instantly — with formula, conversion table, and real-world examples.

You have

Equals

2,544.43

Conversion formula

Forward

BTU per hour = mechanical horsepower × 2,544.43

Reverse

mechanical horsepower = BTU per hour × 0.000393

Example: 10 hp × 2,544.43 = 25,444.34 BTU/h.

About both units

From

Mechanical Horsepower

Mechanical horsepower equals 745.7 watts — James Watt's 1782 definition based on horse labor. Used in US car engines, aircraft and some industrial equipment. US muscle cars quote hp; European cars usually kW or PS.

Real-world: Base Ford Mustang: ~310 hp. Lawn mower: 5 hp. Average car: 150–200 hp.

Read full mechanical horsepower reference →

BTU per Hour

BTU/h

BTU per hour equals 0.293 watts. It is the standard power unit for US HVAC — air conditioners, heaters and boilers. A 24,000 BTU/h AC provides 7 kW of cooling.

Real-world: Small window AC: 5000 BTU/h. Central AC: 24,000 BTU/h. Home furnace: 80,000 BTU/h.

Read full btu per hour reference →

Mechanical Horsepower to BTU per Hour conversion table

Common mechanical horsepower to BTU per hour values for quick reference.

Mechanical Horsepower (hp)	BTU per Hour (BTU/h)
1 hp	2,544.43 BTU/h
5 hp	12,722.17 BTU/h
10 hp	25,444.34 BTU/h
50 hp	127,221.68 BTU/h
100 hp	254,443.36 BTU/h
500 hp	1,272,216.79 BTU/h
1,000 hp	2,544,433.58 BTU/h
5,000 hp	12,722,167.9 BTU/h
10,000 hp	25,444,335.81 BTU/h
50,000 hp	127,221,679.03 BTU/h

Tips & common mistakes

Quick tips

1 hp = 745.7 W = 0.7457 kW.
US car ads quote hp; European ads quote kW or PS.
Metric horsepower (PS) differs by ~1.4% — be aware.

Avoid these

Assuming hp and PS are identical — 1.4% difference.
Using horsepower for electrical devices — watts more appropriate.
Confusing horsepower at engine flywheel vs wheel (transmission losses).

Frequently asked questions

How many BTU per hour in a mechanical horsepower?

One mechanical horsepower equals 2,544.43 BTU per hour.

How do I convert mechanical horsepower to BTU per hour?

Multiply the mechanical horsepower value by 2,544.43 to get the equivalent in BTU per hour.

What is 100 mechanical horsepower in BTU per hour?

100 mechanical horsepower equals 254,443.36 BTU per hour.

Is a mechanical horsepower bigger than a btu per hour?

Yes. 1 mechanical horsepower equals 2,544.43 BTU per hour, so one mechanical horsepower is larger.

How to convert mechanical horsepower to BTU per hour without a calculator?

Multiply by 2,544.43 for a quick estimate; use a calculator for precise results.

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