Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
BTU per hour to Mechanical horsepower
Convert BTU/h to hp instantly, then review the formula, assumptions, and rounding guidance.
Energy, work, heat & powerInstant result
Decimals
Formula result = input × 0.293071070172 ÷ 745.699871582. 1 BTU/h = 0.0004 hp
Common examples
One value, several units
Watts0.2931 W
Kilowatts0.0003 kW
Megawatts0 MW
Mechanical horsepower0.0004 hp
Metric horsepower0.0004 PS
Conversion table
| BTU/h | hp |
|---|---|
| 1 BTU/h | 0.0004 hp |
| 2 BTU/h | 0.0008 hp |
| 5 BTU/h | 0.002 hp |
| 10 BTU/h | 0.0039 hp |
| 25 BTU/h | 0.0098 hp |
| 50 BTU/h | 0.0197 hp |
| 100 BTU/h | 0.0393 hp |
Conversion chart
1 BTU/h0.0004 hp
5 BTU/h0.002 hp
10 BTU/h0.0039 hp
25 BTU/h0.0098 hp
50 BTU/h0.0197 hp
Worked example
1 mechanical horsepower is approximately 745.7 watts.
Unit definition
BTU per hour (BTU/h) One btu per hour equals 0.293071070172 watt.
Unit history
BTU per hour 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 BTU/h to watt.
3. Convert the base value to hp and apply your display precision.
Understand the result before using it
BTU per hour to Mechanical horsepower converts a value measured in BTU per hour (BTU/h) into the equivalent value in Mechanical horsepower (hp). 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 × 0.293071070172 ÷ 745.699871582
Assumptions
- BTU per hour and Mechanical horsepower represent the same power quantity.
- The input is expressed in BTU/h; the output is expressed in hp.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 BTU/h = 0.000393014778922 hp. 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 BTU/h measurement in a document that expects hp.
- Compare a btu per hour value with a value reported in mechanical horsepower.
- Check the BTU/h-to-hp arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse BTU/h 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 BTU per hour to Mechanical horsepower?
result = input × 0.293071070172 ÷ 745.699871582 Using the displayed relationship, 1 BTU/h equals 0.000393014778922 hp.
How many Mechanical horsepower are in one BTU per hour?
One BTU per hour is 0.000393014778922 Mechanical horsepower. The displayed digits may be rounded.
Can I reverse the BTU/h to hp conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts hp back to BTU/h.
Is the BTU per hour to Mechanical horsepower 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.