Triathlon Finish Time & Transition Calculator

Triathlon Planning Guide

What's the key thing to understand about Triathlon Distances?

Sprint: 750m swim / 20km bike / 5km run. Typical finish time 1:00-1:30 for age-groupers. Olympic: 1.5km / 40km / 10km. Typical 2:00-3:00. Half Ironman 70.3: 1.9km / 90km / 21.1km. Typical 4:30-7:00. Full Ironman: 3.8km / 180km / 42.2km. Typical 9:00-16:00. Race cut-off times vary by event — most full Ironman events have a 17-hour cut-off. The swim is typically 15-20% of total race time; bike 50-55%; run 30-35%. T1 and T2 transitions are where beginners often lose significant time, 4-8 minutes compared to a well-practised transition of under 2 minutes, making transition practice a genuinely worthwhile training investment.

What do I need to know about The Brick Effect?

Running off the bike feels very different from fresh running — the legs are fatigued, the cardiovascular system is already working hard, and the neuromuscular patterns of cycling and running conflict. The 'brick' sensation (leaden legs) typically lasts 1-3 minutes in trained triathletes, longer in beginners. Training solution: brick workouts — run immediately after cycling (even 10-15 minutes is valuable). The neuromuscular adaptation comes with consistent bike-run training specifically, not just separate swim, bike, and run sessions in isolation.

What's the key thing to understand about Transition Strategy?

T1 (swim to bike): walk in wetsuit from water to transition. Strip wetsuit efficiently (glide or Body Glide on ankles helps). Helmet on BEFORE touching the bike (race rules). Glasses, shoes (can be clipped into pedals for faster T1). T2 (bike to run): rack bike by saddle or nose. Helmet off after racking (rules). Running shoes, race belt (turn to front), hat/cap. Practice your transition layout in training — 30 seconds saved in transition is easier than a 30-second pace improvement. Elite triathletes can complete a transition in under 60 seconds through relentless practice, turning what looks like a minor detail into a genuine competitive advantage.

What do I need to know about Pacing Strategy?

The biggest Ironman mistake: going too hard on the bike. The run is where races are won or lost — arriving at T2 on empty guarantees a walking death march. Target bike power: 70-75% of FTP for 70.3; 65-70% for full Ironman. Run pace: expect 30-45 seconds/km slower than standalone half/full marathon race pace for equivalent effort. Swim: go out easy — the swim is least variable and burning matches in the water guarantees a suffering run. Course strategy: hills, wind, and terrain affect the power or pace a triathlete should target on the bike, since holding a flat-course number on a hilly route usually leads to blowing up later in the race.