Predict your Ironman (140.6) or 70.3 finish time. Enter your swim, bike and run paces and see your projected total — and every split. Free, instant, fully editable.
Your finish time is just the sum of three races and two transitions. This calculator turns each pace into a split for the official distances:
| Leg | Full (140.6) | Half (70.3) |
|---|---|---|
| Swim | 2.4 mi / 3.8 km | 1.2 mi / 1.9 km |
| Bike | 112 mi / 180 km | 56 mi / 90 km |
| Run | 26.2 mi / 42.2 km | 13.1 mi / 21.1 km |
A planning estimate, not a guarantee — conditions, nutrition and pacing change everything. Train and race within your limits.
Estimate a realistic swim pace, bike speed and run pace you can sustain across the whole day (not your fresh, standalone bests), add your transitions, and this calculator sums them into a projected 140.6 or 70.3 finish.
Many first-timers finish a full Ironman in 12–15 hours (the overall cutoff is 17:00) and a 70.3 in 6–8 hours. Set the paces above to your honest training numbers to see where you'd land.
Fatigue compounds across the day — most athletes ride and especially run slower than their fresh paces. Aim conservative on the bike so you can hold your run, and pad your transitions.