Power Converter
Power converter
Convert SI, horsepower, HVAC, and RF power units with explicit watt standards.
Converted power
1.341022hp
1,000 W × 1 W/W / 745.699872 W/hp = 1.341022 hp
1.341022 hp
Watts basis
1,000 W
Kilowatts
1 kW
Mechanical hp
1.341022 hp
Metric PS
1.359622 PS
W -> hpThe watt is the SI unit of power.
Mechanical horsepower uses 550 ft·lbf/s: 1 hp = 745.699871582 W.
Common conversions
Assumptions & basis
- Linear units normalize through watts using the stated standard for each published unit.
- Mechanical, metric, electric, and boiler horsepower remain separate because their watt definitions differ.
- dBm and dBW are absolute logarithmic power levels referenced to 1 mW and 1 W, not relative dB ratios.
- Zero watts has no finite dBm or dBW value, and negative values are only valid when the input itself is logarithmic.
All equivalents, batch & precisionShowHide
Equivalent power values
Microwatt (µW)
1,000,000,000 µW
Milliwatt (mW)
1,000,000 mW
Watt (W)
1,000 W
Kilowatt (kW)
1 kW
Megawatt (MW)
0.001 MW
Gigawatt (GW)
0.000001 GW
Horsepower, mechanical (hp)
1.341022 hp
Horsepower, metric (PS)
1.359622 PS
Horsepower, electric (hp(E))
1.340483 hp(E)
Horsepower, boiler (hp(S))
0.101942 hp(S)
BTU (IT) per hour (Btu/h)
3,412.141633 Btu/h
Thousand BTU per hour (MBH)
3.412142 MBH
Ton of refrigeration (RT)
0.284345 RT
Foot-pound-force per second (ft·lbf/s)
737.562149 ft·lbf/s
Kilocalorie (thermochemical) per hour (kcal/h)
860.42065 kcal_th/h
Decibel-milliwatt (dBm)
60 dBm
Decibel-watt (dBW)
30 dBW
Batch conversion
One W value per line, up to 100 lines.
Enter one or more values to generate batch results.
Quick table: W to hp
Formula
Linear: converted = input × k_from / k_to. Logarithmic: dBm = 10 × log₁₀(P / 1 mW) dBW = 10 × log₁₀(P / 1 W) P_{\mathrm{dBW}} = 10\log_{10}\left(\frac{P}{1\,\mathrm{W}}\right) - Linear power units are normalized through watts using the stated standard.
- Horsepower variants remain separate because their watt definitions differ.
- dBm and dBW use logarithmic reference-power formulas rather than a linear multiplier.
Example
Worked example: 1000 W to mechanical hp
- 1 Input = 1000 W
- 2 Mechanical horsepower uses 550 ft·lbf/s = 745.699871582 W
- 3 1000 / 745.699871582 = 1.341022 hp
1000 watts is about 1.341022 mechanical horsepower.
How
- Enter a power value; negative numbers are valid only for logarithmic dBm or dBW levels.
- Choose explicit source and destination standards, then read the live conversion path plus the watt-basis context tiles.
- Use Swap to preserve the converted quantity, copy either the result or the detailed report, or open the advanced panel for batch values and all equivalents.
Avoid
- Confusing kW with kWh, which are different quantities.
- Treating mechanical, metric, electric, and boiler horsepower as the same unit.
- Using dB, a relative ratio, as though it were the absolute power level dBm or dBW.
FAQ
Which horsepower standard does hp mean?
Plain hp is mechanical horsepower based on 550 foot-pound-force per second. Metric PS, electric hp(E), and boiler hp(S) are separate options.
How many watts are in one mechanical horsepower?
One mechanical horsepower is 745.699871582 watts. Electric horsepower is 746 W and metric horsepower is 735.49875 W.
Can this convert dBm to watts?
Yes. dBm is referenced to 1 mW, so 0 dBm = 1 mW and 30 dBm = 1 W. Zero watts has no finite dBm value.
Is this for energy conversion?
No. Power is an energy-transfer rate. Use the Energy Converter for J, Wh, kWh, and BTU energy quantities.
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