Triathlon finish-time estimator

What it does

The finish-time estimator returns a projected triathlon total time built from the three leg paces, T1 and T2 times, and three cut-off checkpoints. It also flags whether each cut-off is in danger.

URL: /calculators/ then open Finish time. Direct path: /static/calculators/triathlon_finish_time_estimator.html.

Inputs the form asks for

Race format

• Race distance (select). Four presets: Sprint / Olympic / Half Ironman (70.3) / Ironman.

There is no "custom" distance option on this calculator; if your event has non-standard distances, pick the closest preset and edit the per-leg distances by hand.

• Swim distance (m) — defaults from the preset, editable.
• Bike distance (km) — defaults from the preset, editable.
• Run distance (km) — defaults from the preset, editable.

Paces

• Swim pace (sec/100 m) — slider with numeric readout.
• Bike average speed (km/h) — slider with numeric readout.
• Run pace (min/km) — slider with numeric readout.

There is no bike power input on this calculator. If you want to project from watts, use the bike power plan to convert power to speed first, then feed that speed back here.

Transitions

• T1 time (mm:ss) — swim-to-bike transition.
• T2 time (mm:ss) — bike-to-run transition.

Cut-offs

Three cut-off times for the projection to check the total against:

• Swim cut-off — when the swim must be complete.
• Swim + Bike cut-off — when the bike leg must finish.
• Triathlon (total) cut-off — race overall cut-off.

For a long-course race these come from the event regulations (e.g. IM cut-offs are 2h20 swim, 10h30 bike-out, 17h total).

Outputs

• Swim split, Bike split, Run split — per-leg times computed from pace × distance.
• Total time — sum of legs + T1 + T2.
• Cut-off status for each of the three cut-offs — green if safe, red if exceeded.

How to use it

1. Pick the race distance (or pick closest preset and override the per-leg distances).
2. Pull the pace sliders to your goal paces. The total updates live.
3. Set T1 / T2 from training experience (typical: 90 s for sprint / Olympic, 3-5 min for long course).
4. Enter cut-offs from the race regs to confirm your goal leaves room.

See also: Bike power plan, Race planning wizard, Running-time estimator.