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tool.power-unit-converter Calculator
Converts between watts, kilowatts, megawatts, horsepower (US mechanical and metric), and BTU/hour. Horsepower remains the dominant unit for motors and engines in North America despite SI standardisation everywhere else.
Inputs
Value
Rate of energy transfer (W). P = V×I (electrical). P = F×v (mechanical). 1 horsepower ≈ 746 W.
From Unit
Reference formula or conversion factor shown for context.
Results
watts (W)
The value at the specified point or condition.
kilowatts (kW)
The value at the specified point or condition.
horsepower (hp)
Reference formula or conversion factor shown for context.
BTU/hr
Reference formula or conversion factor shown for context.
kcal/hr
Reference formula or conversion factor shown for context.
1 hp = 745.7 W
Reference formula or conversion factor shown for context.