Triathlon Time Calculator
Total race time from swim, bike, run and transitions.
Enter your values
Enter the swim distance in km.
Enter the swim pace in min/100m.
Enter the bike distance in km.
Enter the bike speed in km/h.
Enter the run distance in km.
Enter the run pace in min/km.
Enter the total transitions in min.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Predicted finish time
- 2h 50m
- Swim split
- 0h 32m
- Bike split
- 1h 20m
- Run split
- 0h 52m
Working
- 131.5 + 80 + 52 + 6 = 169.5 min
Quick answer
Total triathlon time is the sum of all three legs plus both transitions, which often cost several minutes.
total = swim + T1 + bike + T2 + run
At a glance
| What it does | Total race time from swim, bike, run and transitions. |
|---|---|
| Category | Fitness |
| Inputs needed | Swim distance, Swim pace, Bike distance, Bike speed, Run distance, Run pace, Total transitions |
| Main output | Predicted finish time |
| Formula | total = swim + T1 + bike + T2 + run |
| Cost | Free — no sign-up, no download |
How to use the Triathlon Time Calculator
- 1Enter each leg distance for your race — sprint, Olympic, half or full.
- 2Use realistic training paces, not personal bests.
- 3Budget 2-4 minutes per transition unless you have practised them.
Inputs explained
- Swim distance(km)
- Enter the swim distance in km.
- Swim pace(min/100m)
- Enter the swim pace in min/100m.
- Bike distance(km)
- Enter the bike distance in km.
- Bike speed(km/h)
- Enter the bike speed in km/h.
- Run distance(km)
- Enter the run distance in km.
- Run pace(min/km)
- Enter the run pace in min/km.
- Total transitions(min)
- Enter the total transitions in min.
Worked example
Using the values the calculator loads with:
Inputs
- Swim distance1.5 km
- Swim pace2.1 min/100m
- Bike distance40 km
- Bike speed30 km/h
- Run distance10 km
- Run pace5.2 min/km
- Total transitions6 min
Results
- Predicted finish time2h 50m
- Swim split0h 32m
- Bike split1h 20m
- Run split0h 52m
- 31.5 + 80 + 52 + 6 = 169.5 min
Frequently asked questions
Why does the bike dominate?
It is the longest leg by time in almost every format, so bike speed moves your finish time most.
Should I run at open-pace?
No. Off-the-bike run pace is typically 15-30 seconds per km slower.
What do I need to enter into the Triathlon Time Calculator?
Just 7 values: swim distance, swim pace, bike distance, bike speed, run distance, run pace, total transitions. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Triathlon Time Calculator work out the answer?
Total triathlon time is the sum of all three legs plus both transitions, which often cost several minutes. It applies the formula total = swim + T1 + bike + T2 + run and shows the working so you can check each step by hand.
Is the Triathlon Time Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.