Zerdly

Custom Multisport Calculator

Totals finish time across custom-added swim, bike, run and row legs of a multisport event.

100% FreeRuns in your browserBasic
How to use this calculator

Your legs

km
:/km

Result

Add legs with a distance and a pace/speed to see your total time.

Estimate only — real results depend on terrain, weather, fatigue, transitions and conditions. Not medical or coaching advice.

Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.

How to use this calculator

  1. Add any sequence of legs (swim/bike/run/row/hike/paddle/transition).
  2. Enter each leg's distance and pace/speed to get the total time.

How it works

Each leg is timed by its type: swim per 100 m, bike/paddle by speed, run/hike per km, row per 500 m; transitions are added. The total is the sum of all legs.

Worked example

Build your own event. e.g. swim 1 km + bike 40 km + run 10 km + paddle 5 km — any order, any number of legs.

Common mistakes

  • Leaving out transitions — add a time for each changeover or the total reads optimistically.
  • Pacing every leg at solo-best effort; a long multisport needs sustainable splits.

Tips

  • Times are estimates only — not medical or coaching advice. Always train safely and follow event rules.
  • Distances are editable: choose “Custom…” to enter your own course lengths.

Frequently asked questions

What can I build with this?

Any sequence of legs — swim, bike, run, row, paddle, hike — with your own distances and paces, so it covers events the standard templates do not.

Should I include transition time?

Yes — add a transition entry between legs; in real races transitions can total several minutes and change your finish time.

Is there a limit on legs?

No practical limit — add as many as your event needs.

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Cite this tool

Zerdly. (2026). Custom Multisport Calculator. Retrieved from https://www.zerdly.com/tools/custom-multisport-calculator/

Tip: Enter any known values to calculate the remaining results.

All calculations run in your browser. Your inputs are never saved or transmitted.