Zerdly

Aquabike Calculator

Estimates aquabike finish time and swim and bike splits from target pace and speed.

100% FreeRuns in your browserBasic
How to use this calculator
Event
Swim750 m
:
T1
:
Bike20 km

Result

Enter a pace or speed for each leg to see your finish time and splits.

Estimate only — real results depend on course, weather, terrain, fatigue, transitions, equipment, nutrition and event rules. 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. Pick Sprint, Standard, Long or Custom.
  2. Enter your swim pace (per 100 m), bike speed (km/h) and the T1 transition.
  3. Read your total time and splits, or solve a required pace/speed with Target Finish.

How it works

An aquabike is swim → bike (no run). Swim time = (distance ÷ 100) × pace per 100 m; bike time = (distance ÷ speed) × 3600; the transition is added. The total is the sum of the legs.

Worked example

Sprint aquabike. 750 m swim @ 1:50/100 m (13:45) + 20 km bike @ 30 km/h (40:00) + T1.

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 are typical aquabike distances?

They mirror triathlon swim+bike legs — e.g. sprint 0.75 km / 20 km, standard 1.5 km / 40 km, long 1.9 km / 90 km. Distances are editable.

How accurate are these times?

They're estimates. Real race times depend on terrain, weather, elevation, fatigue, transitions, nutrition, equipment, drafting and water conditions. Use them for planning and pacing, not as a guarantee.

Do my inputs get uploaded?

No. Everything is calculated in your browser — nothing is sent to a server or stored.

What is Target Finish mode?

Enter a goal finish time and the paces/speeds for the other legs, then pick the leg to ‘solve for’. The calculator works out the pace or speed you'd need on that leg to hit your goal.

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Cite this tool

Zerdly. (2026). Aquabike Calculator. Retrieved from https://www.zerdly.com/tools/aquabike-calculator/

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

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