Winch Engineering Calculator Instant Motor Power & Rope Diameter Calculator Lifting Capacity (tons) tons Line Speed (m/min) m/min Pulley Ratio :1 Mechanical Eff. (%) % Working Grade M1 M2 M3 M4 M5 M6 M7 M8 Engineering Formulas ▼ Show Variable Definitions TLifting capacity (metric tons) → Converted to kg (×1000) gGravitational acceleration: 9.80665 m/s² mPulley ratio (mechanical advantage multiplier) ηMechanical efficiency (decimal form of percentage) CSelection coefficient based on working grade SFSafety factor based on working grade
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