Triathlon Race Time Calculator
Calculate your total triathlon finish time from swim, bike, and run paces plus transition times.
Works for sprint, Olympic, 70.3, and Ironman distances.
A triathlon finish time is the sum of three discipline times plus two transitions (T1: swim-to-bike, T2: bike-to-run).
Total time = Swim time + T1 + Bike time + T2 + Run time
Standard triathlon distances:
| Event | Swim | Bike | Run |
|---|---|---|---|
| Super Sprint | 400 m | 10 km | 2.5 km |
| Sprint | 750 m | 20 km | 5 km |
| Olympic | 1,500 m | 40 km | 10 km |
| 70.3 (Half Ironman) | 1,930 m | 90.1 km | 21.1 km |
| Full Ironman | 3,860 m | 180.2 km | 42.2 km |
The 70.3 and Ironman figures are usually quoted rounded, as 1.9 km and 90 km. The exact distances come from the imperial originals: 70.3 and 140.6 total miles, which is 1.2 / 56 / 13.1 and 2.4 / 112 / 26.2. Over a full Ironman the rounding is worth about four minutes on the bike alone, which is why the precise figures are used here.
Typical finish times by athlete level (Olympic distance):
- Beginner: 2:30–3:00
- Intermediate club racer: 2:00–2:30
- Competitive age grouper: 1:50–2:10
- Elite age grouper: 1:45–2:00
- Elite pro: under 1:45
Pacing tips:
- Swim: Start conservatively. Overexerting in the water spikes your heart rate and you pay for it on the bike, which is a far longer leg. Aim for 70–80% effort.
- Bike: The longest discipline by time. The classic mistake is riding hard enough to feel good and then having nothing left to run on. Many coaches keep bike effort at 70–75% of FTP (Functional Threshold Power, the highest power you can hold for about an hour).
- Run: The hardest to pace, because your legs are already gone. Over sprint and Olympic distance expect 10–20 seconds per km slower than an equivalent standalone run. Over 70.3 and full Ironman it is more like 10–20 percent slower, because by then the bike has been draining you for hours.
- Transitions: T1 and T2 are asked for separately because they are not the same job. T1 has a wetsuit to strip and a helmet to buckle; T2 is a shoe change. For sprint and Olympic, aim for T1 under 2 minutes and T2 under 1. At Ironman, 5 to 10 minutes each is normal and nobody is quick in a change tent.
A note on the splits you see quoted. Somebody will tell you that 1:10/100m, 40 km/h and 4:00/km is what an Ironman looks like. Add those up and you get about 8 hours, and they are professional figures. The median Ironman finisher is nearer 12 to 13 hours, and the published cut-off is 17. Plug in pro splits by all means to see what the maths does, but do not set them as a target.
Age-group Kona qualifying moves with the division and the size of the field on the day. For men in the 35-39 bracket it has typically landed somewhere around 9:30 to 10:30.
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This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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