Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Mechanical horsepower to BTU per hour
Convert hp to BTU/h instantly, then review the formula, assumptions, and rounding guidance.
Energy, work, heat & powerInstant result
Decimals
Formula result = input × 745.699871582 ÷ 0.293071070172. 1 hp = 2,544.4336 BTU/h
Common examples
One value, several units
Watts745.6999 W
Kilowatts0.7457 kW
Megawatts0.0007 MW
Metric horsepower1.0139 PS
BTU per hour2,544.4336 BTU/h
Conversion table
| hp | BTU/h |
|---|---|
| 1 hp | 2,544.4336 BTU/h |
| 2 hp | 5,088.8672 BTU/h |
| 5 hp | 12,722.1679 BTU/h |
| 10 hp | 25,444.3358 BTU/h |
| 25 hp | 63,610.8394 BTU/h |
| 50 hp | 127,221.6789 BTU/h |
| 100 hp | 254,443.3578 BTU/h |
Conversion chart
1 hp2,544.4336 BTU/h
5 hp12,722.1679 BTU/h
10 hp25,444.3358 BTU/h
25 hp63,610.8394 BTU/h
50 hp127,221.6789 BTU/h
Worked example
1 mechanical horsepower is approximately 745.7 watts.
Unit definition
Mechanical horsepower (hp) One mechanical horsepower equals 745.699871582 watt.
Unit history
Mechanical horsepower is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert hp to watt.
3. Convert the base value to BTU/h and apply your display precision.
Understand the result before using it
Mechanical horsepower to BTU per hour converts a value measured in Mechanical horsepower (hp) into the equivalent value in BTU per hour (BTU/h). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 745.699871582 ÷ 0.293071070172
Assumptions
- Mechanical horsepower and BTU per hour represent the same power quantity.
- The input is expressed in hp; the output is expressed in BTU/h.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 hp = 2,544.43357765 BTU/h. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a hp measurement in a document that expects BTU/h.
- Compare a mechanical horsepower value with a value reported in btu per hour.
- Check the hp-to-BTU/h arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse hp with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Mechanical horsepower to BTU per hour?
result = input × 745.699871582 ÷ 0.293071070172 Using the displayed relationship, 1 hp equals 2,544.43357765 BTU/h.
How many BTU per hour are in one Mechanical horsepower?
One Mechanical horsepower is 2,544.43357765 BTU per hour. The displayed digits may be rounded.
Can I reverse the hp to BTU/h conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts BTU/h back to hp.
Is the Mechanical horsepower to BTU per hour result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.