CalcLibrary

Power Converter

Convert one known power rating between watts, kilowatts, megawatts, horsepower, metric horsepower, and BTU/h. Built for appliance labels, motor specs, HVAC sheets, and engine listings that mix units.

Examples

Restate a 1500 W appliance or tool rating in mechanical horsepower for a mixed-unit comparison.

Converted power
2.0115 hp
Equivalent in watts
1,500 W
Watts conversion path
1500 W -> 1500 W -> 2.0115 hp

The result is smaller because the target unit is larger. One target unit contains about 745.71 source units.

Power-unit converter only — it does not estimate energy use, electricity cost, efficiency, HVAC sizing, engine output safety, or compliance.

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Examples

How It Works

Formula

w=v×ffromw = v \times f_{\text{from}}

r=wftor = \dfrac{w}{f_{\text{to}}}

Variables

vv

Input power value

ww

Equivalent power in watts(W)

rr

Converted power in the target unit

ffromf_{\text{from}}

Watts per source unit(W)

ftof_{\text{to}}

Watts per target unit(W)

The calculator uses watts as the canonical base unit. Your input is first converted into watts, then into the selected target unit. That keeps appliance, motor, HVAC, and engine ratings on one explicit reference basis instead of a web of pair-specific shortcuts.

Reference factors used by the calculator (watts per unit):

  • 1 W = 1 W
  • 1 kW = 1000 W
  • 1 MW = 1000000 W
  • 1 hp = 745.699871582 W (mechanical horsepower)
  • 1 PS/CV = 735.49875 W (metric horsepower)
  • 1 BTU/h = 0.293071070172 W

The calculator multiplies your source value into watts first, then divides by the target-unit factor.

Frequently Asked Questions

01Why does this calculator show watts as a second result?
Watts are the canonical anchor. Even when two spec sheets use different labels, the watts row gives you one stable reference value you can compare directly.
02What is the difference between hp and PS/CV?
Mechanical horsepower (hp) and metric horsepower (PS/CV) are close but not identical. This calculator labels them separately and uses fixed distinct watt factors so the result does not hide that difference.
03Why is BTU/h included but not BTU?
BTU/h is a power rate used on HVAC and equipment specs. Plain BTU is an energy quantity, so it belongs in the Energy Converter rather than this power-only tool.
04How does the conversion work?
Each supported unit maps to a fixed number of watts. The calculator converts your source value into watts first, then divides by the target-unit factor.
05Does this calculator estimate cost, efficiency, sizing, or compliance?
No. It converts one known power rating between units only. It does not estimate electricity cost, runtime, HVAC tonnage, safe equipment sizing, or regulatory compliance.

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