Half Ironman Triathlon Calculator
Half Ironman Triathlon (70.3) Pace Calculator
The 70.3 is where triathlon becomes a true test of endurance and pacing judgement. A 90km bike leg followed by a half marathon run means that athletes who go out too hard on the bike rarely finish the way they started. Knowing your required paces — and practising them in training — is essential.
Use Goal time to enter a target finish and see the exact paces you need per discipline. Switch to Build from splits to enter your known times or paces per leg — type either field and the other updates automatically, with your total race time calculated live.
Enter a time or a pace for each leg — the other field updates automatically. Totals calculate live.
| Leg | Pace | Time |
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Know your targets. Now build the training behind them.
Half Ironman preparation typically spans 16–24 weeks and needs to balance swim volume, bike power and run endurance without breaking the athlete down. Our coaches build periodised plans around your current fitness and your race-day targets.
Talk to a coachNo obligation — just a conversation about where you are and where you want to get to.
Split distributions based on typical age-group 70.3 performances.