Rope Fall Factor Calculator
Enter the fall distance and the rope length under load. The result is a ratio only.
A QUICK WALKTHROUGH
How to use this tool
- Enter a non-negative fall distance.
- Enter a rope length greater than zero, using the same unit.
- Calculate the fall factor ratio.
Defined ratio
Fall factor is calculated as fall distance divided by rope length under load. Keep both lengths in the same unit.
Scope
This tool reports the ratio only. It does not calculate impact force or predict injury, anchor loads, equipment safety, or any other climbing outcome.
Source
Theory reference: Petzl, Fall factor and impact force — theory.
GOOD TO KNOW
Common questions
What does the ratio represent?
It is the fall distance divided by the rope length under load.
Can I mix units?
No. Convert both lengths to the same unit before calculating.
Does this predict force or safety?
No. It reports a ratio only and does not predict impact, injury, anchor or equipment safety.