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PowerCalc
Torque × RPM ÷ 5,252 — the classic dyno formula.
HP = Torque × RPM / 5,252. The constant comes from unit conversion: 1 HP = 33,000 ft·lbs/min, and dividing by 2π gives 5,252. At exactly 5,252 RPM, horsepower and torque are always equal — below that RPM torque is higher, above it horsepower is higher.
Torque is rotational force — it determines acceleration from a stop and towing capacity. Horsepower is torque sustained over time — it determines top speed and high-RPM performance. Diesel trucks have high torque at low RPM; sport bikes have high horsepower at high RPM.
Horsepower
314.2 HP
What you entered
Horsepower formula
300 lb-ft × 5500 RPM ÷ 5252= 314.17 HPConvert to kilowatts
314.17 × 0.7457= 234.27 kWResult
Horsepower: 314.2 HP
300 lb-ft of torque at 5,500 RPM produces 314.2 horsepower (234.3 kW).