Power Converter

unit-converter

Convert between W/mW/kW/MW/GW, hp/PS/CV, BTU/h, TR, kcal/h, VA/kVA/MVA, dBm/dBW, ft·lb/s, and more. All Unit Conversions panel included.

Convert Power

Formula will appear here

All Unit Conversions

Watts0
Milliwatts0
Kilowatts0
Megawatts0
Gigawatts0
Horsepower (mechanical, 550 ft·lb/s)0
Metric Horsepower (PS/CV)0
Metric Horsepower (CV)0
BTU per Hour (IT)0
Kilocalories per Hour (thermochemical)0
Volt-Amperes (VA, unity PF)0
Kilovolt-Amperes (kVA, unity PF)0
Megavolt-Amperes (MVA, unity PF)0
Tons of Refrigeration (TR)0
Decibels relative to 1 mW (dBm)0
Decibels relative to 1 W (dBW)0
Foot-pounds per Second0

Dedicated converters (SI power, horsepower variants, thermal/HVAC, electrical apparent power, logarithmic RF levels, mechanical rates)

272 pages — every pair of units below, with fixed input/output, formulas, examples, and conversion tables.

Power Converter Guide

Quick start

  • Enter a value and pick source and target units. The result updates as you type.
  • Use swap to reverse units and copy to copy the result. The All Unit Conversions panel lists your value across every supported power unit.

Formulas & deeper content

Need formulas, worked examples, and tables for one pair (e.g. kilowatts to horsepower)? Use a dedicated converter from the list above.

Short answers to common questions are in the FAQ section above. Linear units use fixed watt factors; dBm maps through watts with a log₁₀ definition relative to 1 mW.

Example uses

  • Motors and HVAC: kW, hp, and BTU/h.
  • RF engineering: dBm, mW, and W.
  • Electrical ratings: VA at unity PF and watts.
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