Winch Engineering Calculator

Instant Motor Power & Rope Diameter Calculator

Lifting Capacity (tons)

tons

Line Speed (m/min)

m/min

Pulley Ratio

Mechanical Eff. (%)

Working Grade

E	Lifting capacity (metric tons) → Converted to kg (×1000)
g	Gravitational acceleration: 9.80665 m/s²
eu	Pulley ratio (mechanical advantage multiplier)
η	Mechanical efficiency (decimal form of percentage)
C	Selection coefficient based on working grade
SF	Safety factor based on working grade