What distances does each triathlon type use?

Sprint is a 750 m swim, 20 km bike, 5 km run. Olympic is 1.5 km, 40 km, 10 km. The 70.3 half is a 1.9 km swim, 90 km bike, 21.1 km run. A Full Ironman is a 3.8 km swim, 180 km bike, 42.2 km run. The tool loads these official figures automatically.

Why do transitions matter for my finish time?

Transitions T1 (swim to bike) and T2 (bike to run) count toward your official time. In short races a slow transition can cost places, while in long races a couple of unhurried minutes barely register, so the tool lets you set both.

Should I expect to hold my training paces on race day?

Plan slightly conservatively, especially on the run, which is heavily affected by accumulated fatigue and nutrition. Many athletes set a goal pace and a fade-adjusted pace; entering a realistic run pace gives a more honest projection than your fresh standalone times.

How is swim time calculated from a per-100 m pace?

The tool divides the swim leg distance by 100 and multiplies by your seconds-per-100 m pace. For an Olympic swim of 1500 m at 1:50 per 100 m, that is 15 segments times 110 seconds, giving 27 minutes 30 seconds for the swim leg.

Does this account for hilly or windy courses?

No, it assumes your entered paces hold for the whole leg. On hilly bike courses or hot runs, enter an adjusted average pace that reflects the terrain and conditions rather than your best flat numbers.

Triathlon Total Race Time Calculator

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This calculator turns your swim, bike, and run paces into a projected triathlon finish time for any of the four standard distances, then adds your transitions and shows a per-leg breakdown so you can plan pacing and spot where your race is won or lost.

How it works

Each leg’s time is its distance multiplied by your pace, then all four pieces and the two transitions are summed:

swim time = (swim metres / 100) × swim pace per 100 m
bike time = bike km / bike speed in km/h × 3600 s
run time  = run km × run pace per km in seconds
total     = swim + T1 + bike + T2 + run

The official leg distances are loaded for each race type — Sprint, Olympic, 70.3, and Full Ironman — so you only supply your paces and transition times.

Example and tips

An Olympic-distance athlete swimming 1500 m at 1:50/100 m, biking 40 km at 32 km/h, and running 10 km at 5:00/km, with two-minute transitions, finishes in roughly 27:30 + 2:00 + 1:15:00 + 2:00 + 50:00 = 2:36:30. Pace the run conservatively — it is the leg most affected by cumulative fatigue. For long-course racing, enter realistic fade-adjusted bike and run paces rather than your fresh standalone bests, and don’t ignore transitions: in sprint racing they can decide your placing.