Horsepower to Torque & RPM Calculator (HP, kW, Nm & lb-ft)
Calculate mechanical horsepower (HP), metric horsepower (PS), and kilowatts (kW) from engine torque (Nm or lb-ft) and RPM, or convert power back into torque.
Metric Horsepower (PS / ch)
Calculator Inputs
Metric Horsepower (PS / ch)
Engine Power (kW)
Mechanical Horsepower (HP)
Torque lb-ft
Torque kgf-m
Engine Power Output Standard Comparison (PS vs kW vs HP)
Classical physics and automotive dynamometer calculation model: HP = (Torque lb-ft * RPM) / 5252.
This calculator is designed for educational and informational purposes based on publicly declared statutory frameworks. The outputs do not constitute binding financial, tax, or legal advice. We assume no liability for decisions made based on these estimates. Always verify with the relevant official authorities or a certified professional advisor.
Calculation Methodology
Power (kW) = (Torque Nm * RPM) / 9548.8. Mechanical HP = Power kW * 1.34102. Metric HP (PS) = Power kW * 1.35962. Torque lb-ft = Torque Nm * 0.737562.
Frequently Asked Questions
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