Newtons to kilogram-force (N to kgf)

The formula

kgf = N × 0.1019716213

Where the factor comes from — each unit by its definition, then its size in SI:

• 1 N is the SI unit of force.
• 1 kgf = kg × gₙ (standard gravity, CODATA 2022) × m / s² = 9.80665 N

Dividing the two SI sizes gives the factor: 0.101971621298 (rounded for display; the underlying ratio is fixed by the definitions). The reverse factor is 9.80665.

Force in SI is the newton (kg·m/s²). Kilogram-force and pound-force are the weights of a kilogram and a pound at standard gravity — gravity's conventional value, not your local one.

Worked examples

• The weight of a 1 kg mass at standard gravity: 9.80665 N = 1 kgf — 9.80665 × 0.1019716213 = 1
• A firm push: 100 N = 10.1972 kgf — 100 × 0.1019716213 = 10.1972
• The weight of a 10 lb bag at standard gravity (10 lbf): 44.4822 N = 4.53592 kgf — 44.4822 × 0.1019716213 = 4.53592
• A towing load (5 kN): 5,000 N = 509.858 kgf — 5,000 × 0.1019716213 = 509.858

Frequently asked questions