Triathlon Time Calculator

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.