Enter the horsepower and the BTU per hour into the calculator to determine the missing value.

HP to BTU/hr Calculator

Convert horsepower (HP) to heat rate. Choose the horsepower definition to avoid unit mismatches.

Quick reference:
• 1 mechanical HP = 2,544.433 BTU/hr
• 1 metric HP (PS) ≈ 2,508.0 BTU/hr
• 1 boiler HP = 33,475 BTU/hr
Results
Enter values and click Calculate.

Related Calculators

Hp to BTU/hr Formula

The following formula is used to convert horsepower to BTU per hour.

BTU/hr = Hp * 2544.43

Variables:

  • BTU/hr is the energy in British Thermal Units per hour
  • Hp is the horsepower
  • 2544.43 is the conversion factor from horsepower to BTU per hour

To calculate the BTU per hour, multiply the horsepower by the conversion factor 2544.43.

Horsepower to BTU per Hour Conversion Table (1 hp = 2544.43 BTU/hr)
Horsepower (hp) BTU per hour (BTU/hr)
⅛318.054
¼636.108
⅓848.143
½1272.215
¾1908.323
12544.430
1½3816.645
25088.860
37633.290
512722.150
7½19083.225
1025444.300
1538166.450
2050888.600
2563610.750
3076332.900
40101777.200
50127221.500
60152665.800
75190832.250
*Mechanical horsepower: 1 hp = 2544.43 BTU/hr. For reference, 1 kW ≈ 3412.142 BTU/hr and 1 hp ≈ 0.7457 kW.

What is Horsepower?

Horsepower (Hp) is a unit of measurement for power, representing the rate at which work is done. It is commonly used to measure the power output of engines and motors. One horsepower is equivalent to 746 watts.

How to Calculate BTU/hr from Horsepower?

The following steps outline how to calculate BTU/hr from horsepower.

  1. First, determine the horsepower (Hp).
  2. Next, use the formula BTU/hr = Hp * 2544.43 to calculate the BTU per hour.
  3. Finally, insert the values and calculate the result using the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Horsepower (Hp) = 10

BTU per Hour (BTU/hr) = 25444.3