Ironman Pace Calculator
Predict your full Ironman finish time from your swim pace, bike speed, run pace, and transitions.
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Calculation Method
Ironman Pace Calculator
A full Ironman is a 2.4-mile swim, a 112-mile bike, and a 26.2-mile run. This calculator adds up each leg from your own paces, plus transitions, to predict your finish time.
How Your Finish Time Is Built
We convert your swim pace per 100m, bike speed, and run pace into time for each leg over the fixed Ironman distances, then add your transition time for a total.
Pacing an Ironman
Most athletes finish in 12 to 14 hours. The key is a controlled, steady effort: ride within your sustainable power and save enough to run well off the bike.
Frequently Asked Questions
Most age-group athletes finish a full Ironman in 12 to 14 hours, with the course cutoff at 17 hours. Elite pros finish in around 8 hours. Your time depends on your swim, bike, and run fitness plus transitions.
A full Ironman (140.6) is a 2.4-mile (3.86 km) swim, a 112-mile (180.25 km) bike, and a 26.2-mile (42.2 km) marathon run, completed back to back with two transitions.
Most coaches advise a controlled, steady effort: swim smooth, ride within your sustainable power, and save enough to run well off the bike. Going too hard on the bike is the most common cause of a slow marathon.
How long does an Ironman take?
What distances make up a full Ironman?
How should I pace an Ironman?
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