How Keiro Works
Race day confidence is preparation.
Keiro builds your complete race plan — swim, bike, run — from real course data, forecast weather, and your current fitness. Physics-based simulation, not generic calculators. One integrated plan that accounts for all three disciplines together, because how you ride determines how you run.
Every race in our database is fully modelled. Find yours and start planning.
Built for triathletes
A real race plan accounts for all three disciplines
Triathlon racing has three disciplines. A real race plan accounts for all of them.
Keiro models swim, bike, and run as one connected system. How you pace the swim affects your bike. How you execute the bike — your TSS, your Intensity Factor, your variability — determines what your run can be. Every decision feeds forward into the next, and Keiro captures that chain from start line to finish line.
Watch the walkthrough
A 2-minute tour of a real race plan
Real data, real conditions
Your race. Your fitness. Actual conditions.
Real conditions. Real course data. Your actual fitness.
Keiro combines your athlete profile and gear with fully modelled course data and weather — live forecast when your race is close, historical race-date data when it isn't. Factors that can't be directly measured are estimated from extensive sports science research. And for athletes who want to go deeper, Keiro offers an expanding range of manual settings to override defaults and dial in every variable on your terms.
The plan
Not just a prediction. A plan you can race.
The output isn't a number. It's a plan you can race.
Predicted splits, discipline by discipline. A pacing strategy built around your actual fitness and your specific course. Power targets that respond to terrain, not just average effort. The result is a complete picture of how your race should unfold — with depth behind every number, so you arrive at the start line knowing exactly what you're doing and why.
Evaluated 190,385 combinations in 10.5s — so you don't have to.
Your race is already in the database
Every race in the Keiro database is fully modelled — course elevation, terrain, shelter, and historical weather data processed and ready to simulate. We add new events continuously, prioritised in part by athlete requests.
- 140.6
- 20
- 70.3
- 31
- T100
- 2
- Other
- 1
•Club La Santa IRONMAN Lanzarote
•Craft Snowman Legend
•IRONMAN 70.3 Aix-en-Provence
•IRONMAN 70.3 Alghero
•IRONMAN 70.3 Belgrade
•IRONMAN 70.3 Boise
•IRONMAN 70.3 Bolton
•IRONMAN 70.3 Cairns
•IRONMAN 70.3 Chattanooga
•IRONMAN 70.3 Cozumel
•IRONMAN 70.3 Elsinore
•IRONMAN 70.3 Gulf Coast
•IRONMAN 70.3 Jönköping
•IRONMAN 70.3 Kraichgau
•IRONMAN 70.3 Les Sables d'Olonne-Vendée
•IRONMAN 70.3 Málaga
•IRONMAN 70.3 Nice
•IRONMAN 70.3 Oceanside
•IRONMAN 70.3 Portugal-Cascais
•IRONMAN 70.3 Poznań
•IRONMAN 70.3 Subic Bay Philippines
•IRONMAN 70.3 Swansea
•IRONMAN 70.3 Switzerland
•IRONMAN 70.3 Tallinn
•IRONMAN 70.3 Valencia
•IRONMAN 70.3 Venice-Jesolo
•IRONMAN 70.3 Victoria
•IRONMAN 70.3 Vitoria-Gasteiz
•IRONMAN 70.3 Warsaw
•IRONMAN 70.3 Western Australia
•IRONMAN 70.3 Westfriesland
•IRONMAN Cairns
•IRONMAN Calella-Barcelona
•IRONMAN Copenhagen
•IRONMAN Cozumel
•IRONMAN France Nice
•IRONMAN Frankfurt
•IRONMAN Hamburg
•IRONMAN Jacksonville
•IRONMAN Kalmar
•IRONMAN Kärnten-Klagenfurt Austria
•IRONMAN Kona World Champ.
•IRONMAN Lake Placid
•IRONMAN Portugal-Cascais
•IRONMAN South Africa
•IRONMAN Tallinn
•IRONMAN Texas
•IRONMAN Tours Métropole - Loire Valley
•IRONMAN Vitoria-Gasteiz
•IRONMAN Western Australia
•London T100 Triathlon
•Swedeman Xtreme Triathlon
•Vancouver T100 Triathlon
•Zafiro IRONMAN 70.3 Alcúdia-Mallorca
Don't see your race? Let us know and we'll prioritise it.
Ready to see how your race unfolds?
Start your 14-day free trial. Full access from day one, no charge until you're ready to commit.