Custom Multisport Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
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.
How to use this calculator
- Add any sequence of legs (swim/bike/run/row/hike/paddle/transition).
- 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.
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
Is there a limit on legs?
No practical limit — add as many as your event needs.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.