Triathlon Pace Calculator
Who this calculator is for: Use this page when you already know your swim, bike, and run paces and want to convert them into split times. This triathlon pace calculator is the pace-to-split page for swim pace per 100m or 100yd, bike speed, run pace, transitions, and total time across Sprint, Olympic, 70.3, Ironman, or custom distances.
Race distance
Pace & transitions
Results
When This Pace Calculator Is Most Useful
Use this page when you already know your swim pace, bike speed, or run pace and want to see what those numbers mean as race splits. Enter each pace, choose your distance, and the calculator converts them into individual leg times and a total finish time.
The formulas are straightforward. Swim split = distance ÷ pace per 100m. Bike split = distance ÷ speed. Run split = distance × pace per km. Total = swim + T1 + bike + T2 + run.
- Choose your race distance from the presets above.
- Enter your swim pace per 100m or 100yd.
- Enter your bike speed in km/h or mph.
- Enter your run pace per km or mile.
- Add T1 and T2 transition times.
- Review your projected splits and finish time.
Which Pace Change Matters Most?
The table below shows how a small improvement in one discipline affects total time. The bike leg usually offers the biggest time savings because it takes the largest share of the race.
| Scenario | Change | Approx. effect |
|---|---|---|
| Olympic swim (1.5km) | 2:00/100m → 1:55/100m | Saves ~1:15 |
| Olympic bike (40km) | 30 km/h → 32 km/h | Saves ~5:00 |
| Olympic run (10km) | 5:30/km → 5:15/km | Saves ~2:30 |
| 70.3 swim (1.9km) | 2:00/100m → 1:50/100m | Saves ~3:10 |
| 70.3 bike (90km) | 28 km/h → 30 km/h | Saves ~7:00 |
| 70.3 run (21.1km) | 6:00/km → 5:30/km | Saves ~10:30 |
These estimates assume flat terrain and calm conditions. Real-world savings depend on course, weather, and how the change affects your other disciplines.
What Pace Do I Need for a Goal Finish Time?
Your goal finish time depends on how you balance swim pace, bike speed, run pace, and transitions. Here are three common targets to get you started.
Sub-3 Olympic plan
Swim 2:10/100m (32:30) · Bike 32 km/h (1:15:00) · Run 4:45/km (47:30)
~2h 35m plus transitions
Olympic Calculator →Sub-6 70.3 plan
Swim 1:55/100m (36:25) · Bike 30 km/h (3:00:00) · Run 5:30/km (1:56:00)
~5h 32m plus transitions
70.3 Calculator →Sub-12 Ironman plan
Swim 2:00/100m (1h 16m) · Bike 29 km/h (6h 12m) · Run 6:00/km (4h 13m)
~11h 41m plus transitions
Ironman Pace Calculator →Pace Planning Tips
- Use realistic open-water swim pace, not your best pool interval.
- Use bike speed you can sustain without ruining the run.
- Use run-off-bike pace, not fresh standalone run pace.
- Add realistic T1 and T2 times. They are part of the race clock.
- Test conservative, target, and stretch pace plans to prepare for different conditions.
When to Use Another Calculator
Triathlon Calculator — for a broad race estimate across all distances.
Goal Triathlon Time Calculator — if your main goal is total finish-time prediction.
Sprint Triathlon Calculator — for beginner short-course planning.
70.3 Time Calculator — for half-distance planning.
Ironman Pace Calculator — for full-distance 140.6 pacing.
Frequently Asked Questions
What does a triathlon pace calculator do?
It converts your swim pace, bike speed, and run pace into leg split times and a projected total finish time for any race distance.
How do I calculate swim pace for a triathlon?
Swim pace is entered as minutes per 100 metres or per 100 yards. The calculator multiplies your pace by the swim distance to get your swim split time.
Is bike pace entered as speed or minutes per mile?
Bike pace is entered as average speed in km/h or mph. The calculator divides the bike distance by your speed to get your bike split.
Should I use pool pace or open-water pace?
Use open-water pace. Pool pace is usually faster because of flip turns, lane lines, and no sighting. For open water, add 5-15 seconds per 100m to your pool pace.
Are transition times included?
Yes. Enter your estimated T1 (swim to bike) and T2 (bike to run) times. The clock runs through transitions, so realistic estimates matter.
Can I use metric and imperial units?
Both are supported. Use the toggle at the top right to switch between metric (m, km/h, min/km) and imperial (yd, mph, min/mile).
Can I calculate custom triathlon distances?
Yes. Select Custom from the presets and enter your own swim, bike, and run distances for non-standard races or training simulations.
How accurate is the projected finish time?
It depends on the accuracy of your input paces. Use realistic race-day estimates and adjust for course and weather for the most useful projection.
Assumptions & Limitations
The estimates on this page are planning tools, not race guarantees. Your actual finish time depends on course profile, weather, water conditions, drafting rules, equipment, nutrition, heat, elevation, training history, and how well you pace each discipline on race day.
Swim pace estimates assume calm open water or pool conditions. Bike speed estimates assume flat terrain with minimal wind unless adjusted manually. Run pace estimates assume a flat course with moderate temperatures. Transitions vary significantly by venue layout, race size, and personal preparation.
Always test your pacing plan in training before race day. Use this calculator to compare scenarios, not to predict exact outcomes.
Sources & Methodology
The pacing benchmarks, wetsuit legality thresholds, TSS calculations, and FTP guidelines on this page are based on established sports-science principles and common age-group coaching practice:
- Swim drag reduction (18-26%): Reported draft effect ranges from open-water studies and computational fluid dynamics (CFD) modeling. Related research on PubMed. Actual savings depend on swimmer position, water conditions, and duration spent in drafting position.
- Wetsuit time savings (5-12 s/100m):Based on buoyancy and drag-reduction research in controlled pool and open-water settings. Related research on PubMed. Individual results vary by wetsuit fit, body composition, and swim technique.
- Carbon-plate shoe economy (2-4%):Published in peer-reviewed running-economy studies on super-shoe technology. Related research on PubMed. Benefits depend on shoe model, runner biomechanics, pace, and fatigue level.
- FTP pacing ranges: Based on age-group coaching recommendations from sources including TrainingPeaks coaching education, Joe Friel's "The Triathlete's Training Bible," and USAT-certified coaching guidelines.
- Carb intake targets (60-100 g/hr):Reflect current sports-nutrition consensus from the ISSN position stand and ACSM position stand on endurance fueling. Individual tolerance varies.
- TSS estimates: Use the standard Training Stress Score formula (TSS explained by TrainingPeaks). Run TSS is estimated using an analogous model. Actual TSS depends on power or pace data from your specific device.
These sources are cited as general references. The calculator does not account for every variable that affects race-day performance. Always consult a certified coach or sports-medicine professional for individualised pacing and nutrition plans.