Horsepower Calculator

Horsepower – Quick Cheat Sheet

• Main formula (SI): P(W) = \u03C4(N·m) × \u03C9(rad/s), \u03C9 = 2\u03C0 × RPM / 60.
• Mechanical horsepower: 1 hp = 745.700 W (≈ 1 kW = 1.341022 hp).
• Imperial shortcut: hp ≈ (Torque(lb·ft) × RPM) / 5252.
• Torque units: 1 N·m = 0.737562149 lb·ft.
• Zero RPM ⇒ 0 hp (no angular speed).
• Validation: All inputs must be non-negative numbers.