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BTUs per Hour to Horsepower (BTU/h to hp) Converter

1 BTU per hour (BTU/h) = 0.000393015 horsepower (hp). To convert BTUs per hour to horsepower, multiply by 0.000393015: 12000 BTU/h × 0.000393015 = 4.71618 hp.

1 BTU/h = 0.0003930148 hp
Convert the other way: Horsepower to BTUs per Hour

Quick facts

How to convert BTUs per hour to horsepower

  1. Take the value in BTUs per hour.
  2. Multiply it by 0.000393015 (the number of horsepower in one BTU per hour).
  3. Round the result to the precision you need.
hp = BTU/h × 0.000393015

Worked example (a one-ton air conditioner): 12000 BTU/h × 0.000393015 = 4.71618 hp.

To convert horsepower back to BTUs per hour, multiply by 2,544.43, or divide by 0.000393015.

Source: NIST SP 811 (2008), Appendix B (mechanical horsepower and international-table BTU).

BTUs per Hour to Horsepower conversion table

BTUs per Hour to Horsepower conversion table
BTUs per Hour [BTU/h]Horsepower [hp]
1 BTU/h0.0003930148 hp
10 BTU/h0.0039301478 hp
100 BTU/h0.0393014779 hp
1000 BTU/h0.393014779 hp
10000 BTU/h3.9301477896 hp
100000 BTU/h39.3014778959 hp
1000000 BTU/h393.0147789595 hp

BTU/h to hp chart from 1 to 100

Horsepower to BTUs per Hour conversion table

Horsepower to BTUs per Hour conversion table
Horsepower [hp]BTUs per Hour [BTU/h]
0.001 hp2.5444335774 BTU/h
0.01 hp25.444335774 BTU/h
0.1 hp254.4433577403 BTU/h
0.5 hp1272.2167887014 BTU/h
1 hp2544.4335774029 BTU/h
2 hp5088.8671548057 BTU/h
5 hp12722.1678870143 BTU/h
10 hp25444.3357740286 BTU/h

BTUs per Hour vs Horsepower

BTU per HourHorsepower
SymbolBTU/hhp
Equals1 BTU/h = 0.000393015 hp1 hp = 2,544.43 BTU/h

What is a BTU per hour?

The rate of one British thermal unit of heat transfer per hour. Used in the US for air conditioner and heater ratings.

What is a horsepower?

Originally defined to compare steam engines to draft horses. Used worldwide for engine and motor power ratings.

Frequently asked questions

How many horsepower are in a BTU per hour?

There are 0.000393015 horsepower in 1 BTU per hour (1 BTU/h = 0.0003930148 hp).

How many BTUs per hour are in a horsepower?

There are 2,544.43 BTUs per hour in 1 horsepower (1 hp = 2544.4335774029 BTU/h).

How do I convert BTUs per hour to horsepower?

Multiply the number of BTUs per hour by 0.000393015. For example, 10 BTU/h × 0.000393015 = 0.00393015 hp. To convert back, multiply by 2,544.43.

What is 10 BTU/h in horsepower?

10 BTU/h = 0.00393015 hp.

What is 100 BTU/h in horsepower?

100 BTU/h = 0.0393015 hp.

Is the conversion exact?

Yes. The factor comes from the official definitions of both units (NIST SP 811 (2008), Appendix B (mechanical horsepower and international-table BTU)). Results are shown to up to 10 decimal places; round them to suit your purpose.

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Reviewed by

Dr. Muhammad Amjad Khadim PhD Mathematics

Dr. Muhammad Amjad Khadim holds a PhD in Mathematics. He writes and reviews the guides on pakmath.com and checks every formula, conversion factor and worked example against published standards and official guidance before it goes live. Spotted an error? Tell us and it will be corrected.

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First published 28 October 2026 · Last reviewed 5 November 2026