Horsepower to BTU per Hour Converter

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Quick answer: To convert horsepower to BTU per Hour, multiply by 2,544.434. For example, 10 hp is 25,444.34 Btu/h. One horsepower equals 2,544.434 Btu/h.

Use the Horsepower to BTU per Hour Converter

Horsepower to BTU per Hour formula and what each symbol means

Btu/h = hp × 2,544.434

Symbols used in the formula
SymbolMeaning
hpHorsepower
Btu/hBTU per hour

Horsepower to BTU per Hour examples

1 hp

1 hp × 2,544.434 = 2,544.434 Btu/h.

10 hp

10 hp × 2,544.434 = 25,444.34 Btu/h.

100 hp

100 hp × 2,544.434 = 254,443.4 Btu/h.

Horsepower compared with BTU per Hour

One hp is 2,544 times as large as one Btu/h, so your number gets bigger when you convert horsepower to BTU per Hour and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.

About horsepower and BTU per Hour

Horsepower (hp): Mechanical horsepower, about 745.7 watts.

Where horsepower to BTU per Hour conversions are used

Power stations and the grid are described in megawatts and gigawatts. Engines and motors are rated in kilowatts or horsepower, depending on the market.

How to calculate Horsepower to BTU per Hour step by step

  1. Enter the value in hp (the starting unit).
  2. Multiply by 2,544.434, because 1 hp = 2,544.434 Btu/h.
  3. The product is the value in Btu/h. To go back, divide by 2,544.434 or multiply by 0.0003930148.

Popular power conversions

How to read your Horsepower to BTU per Hour result

Quick estimate: multiply by about 2,500 to get BTU per Hour from horsepower; this is within 1.8% of the exact factor. Mechanical horsepower is about 745.7 W while metric horsepower (PS) is exactly 735.49875 W, so check which one a car or motor spec uses.

HORSEPOWERBTU PER HOUR
12,544.434
25,088.867
512,722.17
1025,444.34
2050,888.67
50127,221.7
100254,443.4
1,0002,544,434

BTU per Hour to Horsepower: quick table

BTU PER HOURHORSEPOWER
10.0003930148
50.001965074
100.003930148
250.009825369
500.01965074
1000.03930148
2500.09825369
5000.1965074

Common mistakes when calculating Horsepower to BTU per Hour

  • Using Btu/h for heating loads without noting that 1 ton of refrigeration is 12,000 Btu/h.
  • Dividing when you should multiply: from hp to Btu/h multiply by 2,544.434; from Btu/h to hp divide by 2,544.434.

Horsepower to BTU per Hour FAQ

How many Btu/h are in 1 hp?

1 hp equals 2,544.434 Btu/h.

How many hp are in 1 Btu/h?

1 Btu/h equals 0.0003930148 hp.

Is 1 hp = 2,544.434 Btu/h an exact conversion?

The factor is shown rounded to 7 significant figures (2,544.434). The calculator above uses more digits.

What is a horsepower (hp)?

Mechanical horsepower, about 745.7 watts.

How can I estimate horsepower to BTU per Hour in my head?

Quick estimate: multiply by about 2,500 to get BTU per Hour from horsepower; this is within 1.8% of the exact factor.

What is 12 hp in BTU per Hour?

12 hp = 30,533.2 Btu/h (since 12 × 2,544.434).

What is 60 hp in BTU per Hour?

60 hp = 152,666 Btu/h (since 60 × 2,544.434).

What is 250 hp in BTU per Hour?

250 hp = 636,108.4 Btu/h (since 250 × 2,544.434).

How many decimals should I keep when converting hp to Btu/h?

Match the precision of your original measurement. For example, 25,444.34 Btu/h rounds to 25,400 Btu/h at 3 significant figures; keep more digits only for engineering or scientific work.

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Method, review and disclaimer

Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors