Rock Climbing Rope Length Calculator
Choosing the right rope length is critical for safety. Enter your route's pitch length, number of pitches, and rappel style to estimate the minimum rope length you should bring.
Minimum Rope Length Needed
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Base Length Needed (ft)—
With Safety Margin (ft)—
About this calculator
Estimate the minimum rope length needed for a climb or rappel based on route length, number of pitches, and rappel style.
Frequently Asked Questions
How long should my climbing rope be?
For single-strand rappels or lowers, your rope must be at least twice the pitch length. For double-rope rappels, each strand only needs to equal the pitch length.
Why add a safety margin?
Rope stretch, uneven anchor positions, and terrain irregularities mean you should never cut it close to the exact minimum length.
What's a standard climbing rope length?
Most sport and trad ropes today are sold in 60m (197ft) or 70m (230ft) lengths to accommodate most single-pitch routes.