Free Race Tool

Ironman & 70.3 Time Calculator

Estimate your Ironman or 70.3 finish time using your swim pace, bike speed, and run pace. Built by experienced endurance coaches, this free calculator helps you plan smarter pacing and understand where meaningful gains can be made on race day.

Swim 3.8 km Bike 180 km Run 42.2 km
Time per 100 m
Average speed
Time per km
Swim–:–:–
Bike–:–:–
Run–:–:–
Projected finish time –:–:–

Real Athletes. Real Times.

Every athlete below had a full-time life and a target that looked tight on paper.

11:59:46
Ironman Western Australia

Zac came to Ogging with one goal — go sub-12 at Ironman WA — while juggling full-time work and AFL umpiring. Coached by Reece Harris around his life rather than against it, he crossed the line 14 seconds inside his goal.

Zac Butterworth
5:18:00
70.3 — First-Ever Triathlon

Katie had never raced a triathlon before. A structured coaching block later she finished her debut 70.3 in 5:18 and qualified for the 70.3 World Championships in Nice.

Katie Muir
10:34:00
Ironman Western Australia — Kona Qualifier

Lucy arrived with a single ambition: qualify for the Ironman World Championship. After twelve months of structured progression she ran 10:34 at Ironman WA in Busselton — not just a finish, but a Kona slot.

Lucy Murdoch

Ironman Pacing — Common Questions

What is a good Ironman finish time?

It depends on your fitness, the course, and conditions, but a useful frame: sub-13 hours is a strong age-group result for most athletes, sub-12 is competitive, and sub-10 is approaching the front of age-group fields. The largest gains for most athletes come from pacing discipline and the bike-to-run transition, not raw fitness alone.

What is the average 70.3 finish time?

Across most amateur fields, 70.3 finish times cluster between 5:30 and 6:30. A well-paced sub-5:30 is a solid competitive age-group result, and the single biggest variable for most athletes is run pacing held off a controlled bike leg.

How should I pace the Ironman bike leg?

The most common mistake is riding the bike too hard and paying for it on the run. For a full Ironman the bike should feel almost easy for the first half — the goal is to arrive at T2 with the capacity to run, not to set a bike PB.

How accurate is this Ironman time calculator?

It's a planning estimate based on steady swim, bike, and run pacing. It doesn't model fatigue, nutrition, transitions, or course profile — which is exactly where coaching makes the difference between a projected time and an executed one.

How long does it take to prepare for an Ironman?

For an athlete with an endurance base, a focused build of 16–24 weeks is typical. First-time athletes generally benefit from a longer runway. The right timeline depends on your starting point — a coach can map it specifically to your race date.

Need More Than Finish Time?

Bike power (FTP), marathon & half splits, pace bands, and threshold calculators — all our free race tools live in one place.

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The calculator shows you where you are. Coaching shows you where the time is hiding — and the first week is free, with no lock-in.

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