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HasieraKalkulagailuakTriathlon time calculator
Free tool

Triathlon time calculator

Three sports. One finish time.

Type your swim pace, bike speed, run pace and transitions. Predict your total finish at sprint, olympic, 70.3 or full ironman distance.

2026 mai. 18(a)(e)an eguneratua
Build your race plan
Race distance
Swim pace
Per 100m. Most amateurs are 1:45 – 2:30/100m.
Minutes
Seconds
T1 (swim → bike)
Wetsuit off, helmet on, mount the bike.
Minutes
Seconds
Bike speed
Average over the bike leg. Use a recent ride as a baseline.
T2 (bike → run)
Rack the bike, swap shoes, head out.
Minutes
Seconds
Run pace
Per km. Triathlon run pace is usually 15-30 sec slower than fresh.
Minutes
Seconds
Olympic
2:48:30
Total triathlon time

Predicted Olympic finish: 2:48:30.

Swim30:00
T12:00
Bike1:20:00
T21:30
Run55:00
Total2:48:30
Find triathlon races

How triathlon time is calculated

Total time = swim + T1 + bike + T2 + run. Each segment is a function of distance and pace/speed. The calculator uses the standard distances for each format (sprint, olympic, 70.3, ironman). Adjust the four pace inputs and the two transitions to model your race plan.

Race distanceSwimBikeRun
Sprint750 m20 km5 km
Olympic1500 m40 km10 km
70.3 (Half Ironman)1900 m90 km21.0975 km
Ironman3800 m180 km42.195 km

How accurate is this?

The math assumes consistent pace across each segment. In practice, fatigue, hills, wind, swim drafting and aid-station stops add noise. Treat the prediction as a goal-setting baseline and refine it with race-day data.

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Pace · Time · Distance
Pace calculator

Convert pace, finish time and distance for any race from 5K to ultra. Includes split times and predicted race times.

Riegel formula
Race time predictor

Type a recent race result and we predict your finish time at every standard distance — 5K, 10K, half marathon, marathon and beyond.

Run + 8 stations
HYROX time calculator

Combine your 1km run pace with station times to predict your HYROX finish — Pro, Open, Men, Women.

MPH/KPH ↔ min/mile
Treadmill pace converter

Turn treadmill speed and incline into min/mile, min/km and outdoor-flat-equivalent pace.

FAQ

What are the standard triathlon distances?▾

Sprint: 750m swim / 20km bike / 5km run. Olympic: 1500m / 40km / 10km. 70.3 (half ironman): 1900m / 90km / 21.1km. Ironman: 3800m / 180km / 42.2km.

How fast should my T1 and T2 be?▾

Amateur transitions average 2-4 minutes each. Pros are under a minute. Practice transitions in training — saving 60 seconds in T1 is free time.

Why is my run pace slower in a triathlon?▾

90 minutes (or more) on the bike pre-fatigues your legs. Most age-group triathletes lose 15-30 sec/km versus a fresh open run, especially in 70.3 and ironman.

Can this calculator handle relays or aquabike?▾

Not directly — it assumes one athlete, all four phases. For relays, calculate each leg separately and sum. For aquabike, set run pace to 0 (the calculator will treat it as no run leg).