Swim time = (distance ÷ 100) × pace per 100. Bike time = distance ÷ speed. Run time = distance × pace per km/mi. Total time sums all three legs plus T1/T2 transitions. Related: swim pace, running pace.
You enter distances for swim, bike, and run along with pace (swim per 100m/yd, run per km/mile) and average bike speed. Swim time = (distance ÷ 100) × pace per 100. Bike time = distance ÷ speed. Run time = distance × pace per unit. Transitions are added in minutes. The tool sums all five segments for total time and calculates each leg's percentage share.
Sprint: 750m swim, 20km bike, 5km run. Olympic: 1.5km swim, 40km bike, 10km run. Half Ironman (70.3): 1.9km swim, 90km bike, 21.1km run. Full Ironman: 3.86km swim, 180km bike, 42.2km run.
Competitive athletes often complete T1 (swim to bike) in 2–4 minutes and T2 (bike to run) in 1–2 minutes. Beginners should budget 5–8 minutes per transition. Practicing transitions reduces race-day time.
Swim a timed 400m in a pool and divide total seconds by 4 to get your per-100m pace. Open water is typically 5–15% slower than pool pace due to sighting, currents, and drafting.
Most coaches recommend a conservative swim, steady bike at 75–80% effort, and progressively faster run. Going too hard on the bike is the most common pacing mistake in triathlon.
No. The calculator uses flat, steady-state arithmetic. Hilly courses, wind, drafting (in draft-legal races), and nutrition strategy all affect real finish times significantly.
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.