Fall force calculator

Body mass 80 kg

Drop height 1.0 m

Rope in system 10 m

Rope type

Fall factor

0.10

Peak force

— kN

— kgf

Static equiv.

— kN

— kgf

Rope elongation

— m

— % of rope length

Peak force uses the energy model: F = mg + √(m²g² + 2·EA·mg·h/L). EA values represent rope stiffness at impact load levels — higher than the static elongation figure on datasheets. Rope elongation shown is the dynamic stretch at peak force, not the EN 1891 static measurement. Assumes rigid anchor with no belay device absorption.