Convert Horsepower to BTU per Hour
Instantly convert Horsepower (hp) to BTU per Hour (BTU/hr) with our free online calculator.
Formula: hp to BTU/hr — multiply by 2544.43
Reference Table
| Horsepower (hp) | BTU per Hour (BTU/hr) |
|---|---|
| 1 | 2544.43 |
| 5 | 12722.2 |
| 10 | 25444.3 |
| 25 | 63610.9 |
| 50 | 127222 |
| 100 | 254443 |
How to Convert Horsepower to BTU per Hour
Formula
To convert Horsepower (hp) to BTU per Hour (BTU/hr): multiply by 2544.43
Step-by-Step
- Start with your value in Horsepower (hp).
- Multiply by 2544.43 to perform the conversion.
- The result is your value expressed in BTU per Hour (BTU/hr).
Conversion Factor
1 hp = 2544.43 BTU/hr
Reverse Factor
1 BTU/hr = 0.000393015 hp
Worked Example
Convert 25 Horsepower to BTU per Hour: 25 hp = 63610.9 BTU/hr
About Horsepower (hp)
An imperial unit of power equal to approximately 745.7 watts, originally defined by James Watt to compare steam-engine output to draft horses pulling coal. Horsepower remains the dominant US unit for car engines, outboard motors, tractors, lawn equipment, and HVAC blowers. A typical sedan has 150–300 hp; a Tesla Model S Plaid has ~1,000 hp. Metric horsepower (PS, CV) is slightly different at 735.5 W — a detail that matters when comparing US-spec vs European-spec engine ratings.
About BTU per Hour (BTU/hr)
An imperial unit of power (rate of heat transfer), equal to approximately 0.293 watts. BTU/hr is the dominant unit for US HVAC equipment sizing: air conditioner and heat pump capacity (a 24,000 BTU/hr unit is a "2-ton AC"), furnace output, water heater capacity, and heating/cooling load calculations per room. One "ton of refrigeration" = 12,000 BTU/hr ≈ 3.517 kW. Converting BTU/hr to watts is standard when US HVAC equipment is used in metric-labeled markets.
Quick Facts
- 1 Horsepower equals 2544.43 BTU per Hour
- 1 BTU per Hour equals 0.000393015 Horsepower
- Horsepower is a unit of power
- BTU per Hour is a unit of power
- This conversion is commonly used in electrical systems, automotive performance, and HVAC sizing
- The Horsepower belongs to the imperial system
Common Horsepower to BTU per Hour Conversions
| Horsepower (hp) | BTU per Hour (BTU/hr) |
|---|---|
| 0.01 | 25.4443 |
| 0.1 | 254.443 |
| 0.25 | 636.109 |
| 0.5 | 1272.22 |
| 1 | 2544.43 |
| 2 | 5088.87 |
| 3 | 7633.3 |
| 5 | 12722.2 |
| 10 | 25444.3 |
| 15 | 38166.5 |
| 20 | 50888.7 |
| 25 | 63610.9 |
| 50 | 127222 |
| 75 | 190833 |
| 100 | 254443 |
| 250 | 636109 |
| 500 | 1272220 |
| 1000 | 2544430 |
| 5000 | 12722200 |
| 10000 | 25444300 |
Understanding Horsepower
The Horsepower (symbol: hp) is a unit of power. An imperial unit of power equal to approximately 745.7 watts, originally defined by James Watt to compare steam-engine output to draft horses pulling coal. Horsepower remains the dominant US unit for car engines, outboard motors, tractors, lawn equipment, and HVAC blowers. A typical sedan has 150–300 hp; a Tesla Model S Plaid has ~1,000 hp. Metric horsepower (PS, CV) is slightly different at 735.5 W — a detail that matters when comparing US-spec vs European-spec engine ratings.
It belongs to the imperial measurement system.
Horsepower are commonly used in electrical systems, automotive performance, and HVAC sizing.
Understanding BTU per Hour
The BTU per Hour (symbol: BTU/hr) is a unit of power. An imperial unit of power (rate of heat transfer), equal to approximately 0.293 watts. BTU/hr is the dominant unit for US HVAC equipment sizing: air conditioner and heat pump capacity (a 24,000 BTU/hr unit is a "2-ton AC"), furnace output, water heater capacity, and heating/cooling load calculations per room. One "ton of refrigeration" = 12,000 BTU/hr ≈ 3.517 kW. Converting BTU/hr to watts is standard when US HVAC equipment is used in metric-labeled markets.
It belongs to the imperial measurement system.
BTU per Hour are commonly used in electrical systems, automotive performance, and HVAC sizing.
Why Convert Horsepower to BTU per Hour?
Power conversions between Horsepower and BTU per Hour are needed in electrical engineering, automotive performance comparison, and HVAC system design. Motor ratings, generator capacities, and appliance specifications are published in different power units depending on the manufacturer and region.
Frequently Asked Questions
How do I convert Horsepower to BTU per Hour?
An imperial unit of power equal to approximately 745. To convert Horsepower to BTU per Hour, multiply by 2544.43. For example, 25 hp equals 63610.9 BTU/hr.
How many BTU per Hour are in 1 Horsepower?
There are 2544.43 BTU per Hour in 1 Horsepower.
How many Horsepower are in 1 BTU per Hour?
There are 0.000393015 Horsepower in 1 BTU per Hour.
What is the formula for Horsepower to BTU per Hour conversion?
The formula is: multiply by 2544.43. This means 1 hp = 2544.43 BTU/hr.
Is a Horsepower bigger than a BTU per Hour?
No. One Horsepower is smaller than one BTU per Hour because 1 hp equals 2544.43 BTU/hr, which is greater than 1.
When do you need to convert between Horsepower and BTU per Hour?
An imperial unit of power (rate of heat transfer), equal to approximately 0. Horsepower and BTU per Hour are both power units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.