Climbing Calculators
Rope length, belay calculations, knot strength, fall factor, anchor loads and rack planning.
Rope Length Calculator
Calculate the minimum rope length needed for your climb and rappel.
Belay Calculator
Calculate belay forces, friction and holding power for different belay devices.
Knot Strength Calculator
Compare knot types and calculate retained rope strength after tying.
Fall Factor Calculator
Calculate fall factor, impact force and energy from fall distance and rope out.
Anchor Calculator
Calculate load distribution across multiple anchor points at different angles.
Rack Calculator
Build a climbing rack list based on route grade, length and crack sizes.
Quickdraw Calculator
Calculate quickdraw requirements based on route length and bolt spacing.
Rappel Calculator
Calculate the number of rappels needed and rope length required for your descent.
8 free calculators in Climbing
Climbing Calculations and Safety
Climbing involves significant forces that need to be understood for safe practice. Fall factor, impact force, anchor loads and rope specifications all play into the safety equation. Our climbing calculators help you understand these forces and make informed decisions.
Fall factor is calculated as fall distance divided by rope paid out. A fall factor of 2 is the theoretical maximum (falling twice the length of rope out) and generates the highest impact force. Modern dynamic climbing ropes are designed to absorb energy and keep impact forces below 12kN (the UIAA standard).
Anchor load distribution depends on the angle between anchor points. At 60 degrees, each anchor point takes 58% of the load. At 120 degrees, each point takes 100% of the full load. Our anchor calculator shows exactly how forces distribute across your anchor system at any angle.