How far can I rappel on a single rope?

On a single rope doubled through an anchor, you can rappel half the rope length minus anchor losses (typically 1-2m). With a 60m rope, your maximum rappel is about 28m. With two ropes joined, you can rappel the full length of one rope minus anchor losses.

Anchor loss is the length of rope used for threading through the anchor and tying knots. Typically 1-3 metres per rappel station depending on anchor configuration. This reduces your usable rappel distance.

When should I use two ropes for rappelling?

Use two ropes joined together when your descent exceeds half your rope length (about 28m with a 60m rope). Two 60m ropes joined allow up to 58m rappels. Half ropes or twin ropes are ideal for this purpose.

How do I know where to stop for intermediate anchors?

On multi-rappel descents, intermediate anchor stations should be within your maximum rappel distance. Check guidebooks for established rappel routes. If creating your own descent, look for ledges with natural anchors or leave gear for anchors within your rope reach.

CampCalcs

Rappel Calculator

Calculate the number of rappels needed and rope length required for your descent.

Total Descent

Total vertical height to descend

Rope Length

Rope Setup

Anchor Loss Per Rappel

Rope used for anchor threading

How We Calculate This

This calculator determines how many rappels you need based on your rope length and descent height.

Single rope rappel

Max rappel = (Rope length / 2) - Anchor loss

Double rope rappel

Max rappel = Rope length - Anchor loss

Number of rappels

Rappels needed = Total descent / Max rappel length (rounded up)

Frequently Asked Questions

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Calculate load distribution across multiple anchor points at different angles.

Last updated: February 2026

All calculations are estimates. Always verify conditions and use proper safety equipment outdoors.