Triathlon Calculator
Enter pace, speed, or split times for swim, bike, and run — plus transitions — to get your total race time. Updates live as you type.
Triathlon Calculator: Predict Your Race Time with Precision
Planning a triathlon? Whether you’re racing a Sprint, Olympic, Half-Ironman, or full Ironman, knowing your expected finish time is essential for pacing and goal setting.
Our free Triathlon Calculator lets you estimate your total race time by combining swim, bike, and run performance — including transition times (T1 and T2).
How the Triathlon Calculator Works
Key features:
- Unit Toggle — Switch between Metric and Imperial
- Race Presets — Sprint, Olympic, Half-Ironman (70.3), and Ironman (140.6)
- Custom Distances — Enter your own swim, bike, and run distances
- Live Pace ↔ Time Conversion
- Swim: pace (min/100m or min/100yd) ↔ split time
- Bike: speed (km/h or mph) ↔ split time
- Run: pace (min/km or min/mi) ↔ split time
- Transition Times — Add T1 (swim to bike) and T2 (bike to run)
- Real-time Results — Total time updates automatically
What You’ll See in the Results
- Total estimated race time
- Individual split times (Swim, T1, Bike, T2, Run)
- Your swim pace, bike speed, and run pace
Supported Race Distances
| Race Type | Swim | Bike | Run |
|---|---|---|---|
| Sprint | 750 m | 20 km | 5 km |
| Olympic | 1.5 km | 40 km | 10 km |
| Half-Ironman | 1.9 km | 90 km | 21.1 km |
| Ironman | 3.8 km | 180 km | 42.2 km |
| Custom | Your choice | Your choice | Your choice |
Why Use This Triathlon Calculator?
- Set realistic race goals
- Plan pacing strategy across all three disciplines
- Experiment with different swim, bike, and run performances
- Account for transition times (often overlooked)
- Useful for both beginners and experienced triathletes
Pro Tips for Better Predictions
- Use recent training data for more accurate inputs
- Be conservative with transition times if you’re new to racing
- Account for course conditions (hills, wind, open water)
- Practice transitions in training — they can save valuable minutes
Combine with other SportyCalc tools:
- Use the Pace Calculator to refine run and swim paces
- Check your Fitness Age to track overall endurance progress
- Plan nutrition with the TDEE and Macro Calculators
Disclaimer: Race time predictions are estimates only. Actual performance depends on fitness level, course difficulty, weather, nutrition, and race-day conditions. This tool is for planning and educational purposes.
Ready to plan your next triathlon? Enter your expected paces and speeds above to calculate your total race time.