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.
How It Works
Formula
Variables, symbols and units
- Input power value
- Equivalent power in watts(W)
- Converted power in the target unit
- Watts per source unit(W)
- Watts per target unit(W)
Calculation method explained
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
Why 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.
What 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.
Why 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.
How 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.
Does 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.