Triathlon Time Calculator
Calculate your total triathlon finish time from swim, bike, and run paces plus transition times.
Covers Sprint, Olympic, and Ironman distances.
Triathlon total finish time is the sum of three discipline times plus transition times. The complete formula is:
Total Time = T_swim + T1 + T_bike + T2 + T_run
Where:
- T_swim = Swim Distance / Swim Pace (per 100m or 100yd)
- T_bike = Bike Distance / Average Bike Speed
- T_run = Run Distance / Average Run Pace (per km or mile)
- T1 = Swim-to-Bike transition time
- T2 = Bike-to-Run transition time
Each segment pace is converted to a consistent time unit (minutes) before summing.
Worked Example — Sprint Triathlon (750m / 20km / 5km):
- Swim: 750m at 2:00/100m = 750/100 × 2:00 = 15:00
- T1 (transition): 2:30
- Bike: 20 km at 30 km/h = 20/30 × 60 min = 40:00
- T2 (transition): 1:30
- Run: 5 km at 5:30/km = 5 × 5:30 = 27:30
- Total Finish Time = 15:00 + 2:30 + 40:00 + 1:30 + 27:30 = 1:26:30
Standard Triathlon Distances:
- Sprint: 750m swim / 20km bike / 5km run
- Olympic: 1.5km / 40km / 10km
- Half-Ironman (70.3): 1.9km / 90km / 21.1km
- Full Ironman: 3.86km / 180km / 42.2km
Typical Finish Times (amateur):
- Sprint: 1:00–1:45
- Olympic: 2:00–3:00
- Half-Ironman: 5:00–7:30
- Ironman: 10:00–16:59 (cutoff)
Transition times often account for 3–8% of total finish time in shorter events — more impactful than most athletes realize.
How we build and check this calculator
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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