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Brick Workout Calculator

Calculates combined bike and run times with transition for a triathlon brick workout.

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How to use this calculator

Templates are illustrative distances you can edit, not event regulations.

Bike20 km
Transition
:
Run5 km
:

Result

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

Constant average pace for each leg: no drafting, gradient or fatigue model. 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 a brick preset, and tick Edit distances to change the legs.
  2. Enter your bike speed and run pace to get the total workout time and splits.

How it works

A brick is a bike leg followed immediately by a run. Bike = (distance ÷ speed) × 3600; run = distance × pace per km; plus the transition.

Worked example

Sprint brick. 20 km bike @ 32 km/h + 5 km run @ 5:30/km + transition.

Common mistakes

  • Running the brick run at fresh-run pace — legs are heavy off the bike, so expect 10–20 sec/km slower at first.
  • Skipping a quick transition rehearsal, which costs time on race day.

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 is a brick workout?

Two disciplines back to back — usually a bike followed immediately by a run — to train the legs for the off-bike feeling in triathlon.

How long should the run off the bike be?

Even a short 10–15 minute run teaches the transition; build duration gradually as race day nears.

Why train bricks?

Running off the bike feels different (heavy legs); brick sessions train that transition for triathlon.

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Cite this tool

Zerdly. (2026). Brick Workout Calculator. Retrieved from https://www.zerdly.com/tools/brick-workout-calculator/

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

Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.