Triathlon Finish Time Calculator

Predict your triathlon finish time based on your current swim, bike, and run performance. Select your race distance, Sprint, Olympic, Ironman 70.3, or Full Ironman, and enter your pace for each discipline. The calculator estimates your total finish time including transitions (T1 and T2). Use it to set race-day goals, or to see how improving one discipline affects your overall time. The calculator does not check your estimate against race cutoffs; the published Ironman and 70.3 cutoffs are listed further down this page so you can compare against them yourself.

1500m swim · 40 km bike · 10 km run

:min : sec / 100m
:min : sec / km

Finish Time

3:10:30

Olympic triathlon

Share of your finish time
🏊Swim(16%)
30:00
→T1
2:30
🚴Bike(50%)
1:36:00
→T2
2:00
🏃Run(31%)
1:00:00
⏱Transitions(3%)
4:30

T1 and T2 here are this site's planning defaults for the distance (2.5 min / 2 min), not published averages. See where these numbers come from, below.

This calculator is for reference only. Where each figure comes from is set out below, and a race day is not a calculation.

Source: World Triathlon: Official Race Distances (distances only)

Plan your bike leg nutrition with our Cycling Nutrition Calculator. Also useful: Calculate splits → · Check swim pace →

Average Triathlon Finish Times by Distance

Typical finish time ranges by ability level for each triathlon distance. Times include transitions.

DistanceBeginnerAge-Group AverageCompetitiveElite/Pro
Sprint1:30 to 2:001:10 to 1:300:55 to 1:100:50 to 0:55
Olympic3:00 to 4:002:30 to 3:002:00 to 2:301:45 to 1:55
70.36:30 to 8:005:30 to 6:304:30 to 5:153:45 to 4:15
Ironman14:00 to 16:4512:00 to 14:009:30 to 11:007:45 to 8:30

Times include transitions. Ironman cutoff is 17 hours. 70.3 cutoff is typically 8:30. Use the calculator above with your actual pace data for a personalised estimate.

Ironman Cutoff Times, Will You Make It?

Full Ironman cumulative cutoffs from race start.

DisciplineDistanceCumulative Cutoff
Swim3.8 km (2.4 mi)2:20:00
Bike180 km (112 mi)10:30:00 (from race start)
Run42.2 km (26.2 mi)17:00:00 (from race start)

Ironman 70.3 Cutoff Times

Discipline70.3 Distance70.3 Cutoff
Swim1.9 km (1.2 mi)1:10:00
Bike90 km (56 mi)5:30:00 (from start)
Run21.1 km (13.1 mi)8:30:00 (from start)

These are the standard branded Ironman cutoffs. Individual races change them, so check the athlete guide for the race you entered. Read the bike row as cumulative: 10:30 from the gun is a 2:20 swim allowance plus roughly 8:10 on the bike, not 10:30 of riding. The calculator above does not compare your estimate against these limits; it gives you a finish time and you read it against this table.

What Pace Do I Need?, Target Splits for Each Distance

Required swim pace, bike speed, and run pace to hit a target Ironman or 70.3 finish time.

Finish Time TargetSwim Pace (/100m)Bike SpeedRun Pace (/km)
70.3 under 5:001:5933 km/h (20.5 mph)4:25
70.3 under 6:002:2728 km/h (17.4 mph)5:27
70.3 under 7:002:5324 km/h (14.9 mph)6:23
Ironman under 10:002:0133 km/h (20.5 mph)4:29
Ironman under 12:002:2327 km/h (16.8 mph)5:16
Ironman under 14:002:5524 km/h (14.9 mph)6:27
Ironman under 17:00 (cutoff)3:2319 km/h (11.8 mph)7:29

Every row is computed by the calculator on this page, using the same transition allowances it uses everywhere else, and every value in it is one the pickers above will accept, so you can enter a row and get the target it is named after back, to within a quarter of a minute of rounding. To work a goal time backwards the calculator has to assume how the effort is shared out, and it assumes a fixed 13 percent swim, 55 percent bike and 32 percent run of the moving time. That is a planning assumption of this site's, used only for this table, and it is not a description of your own race: the percentages beside your result above are your own three splits, which will not match these unless you happen to be built that way. A strong cyclist hits the same finish from a very different set of splits.

Where these numbers come from

The distances are official. Sprint, Olympic, 70.3 and Ironman lengths come from World Triathlon and from Ironman's own race specifications, and that is the one thing on this page a governing body actually publishes.

The transition times are ours. World Triathlon publishes race results, and those results contain transition splits, but it publishes no average transition time per distance. There is no governing body figure to cite here, so nobody should be cited. The defaults here, 2 to 4 minutes for T1 and 1.5 to 3 for T2, are planning allowances that scale with distance because longer races mean wetsuits, bike bags and longer runs through transition. A practised age grouper beats them; a first timer at an Ironman will not.

The percentages beside your result are computed, not assumed. They are your own three splits divided by your own total, transitions included, which is why they do not add up to one hundred. The illustration further up the page showing a typical distribution is a drawing of a common shape, not a measurement.

The finish times by level are a convention. The beginner, age group and competitive columns describe what those words usually mean in club conversation. No federation publishes finish time bands by ability, and results distributions differ so much between a flat race and a hilly one that a single table can only ever be a rough orientation.

The cutoffs are Ironman's, and this calculator does not check them. The limits in the tables above are the standard branded Ironman and 70.3 cutoffs, which individual races are free to change, so the athlete guide for your race is the only authority. The widget gives you a finish time and leaves the comparison to you rather than printing a pass or fail against a limit that may not apply to the race you entered.

How to Predict Your Triathlon Finish Time

Your triathlon finish time depends on four factors: swim pace (per 100m or 100yd), bike speed (km/h or mph), run pace (per km or per mile), and transition times. Most first-time triathletes underestimate transitions, T1 (swim-to-bike) and T2 (bike-to-run) add 5 to 15 minutes total. The calculator above accounts for these. For the most accurate prediction, use recent training data: your actual swim CSS pace (estimate it with our swim pace calculator), a recent bike average speed, and your current easy run pace (not your 5K PR). See all race distances in our triathlon distances guide.

Why Your Race Day Will Be Slower Than Training

Expect race day to be 5 to 15% slower than training for three reasons: (1) Open water swimming is slower than pool, waves, sighting, and wetsuit adjustments add time. (2) Bike pacing matters, going 10% too fast on the bike can make you 30% slower on the run. (3) Cumulative fatigue, your run pace after 90 to 180 km of cycling is significantly slower than a standalone run. Add 10% to your calculator result for a realistic first-race estimate. Plan race-day fuel with our Cycling Nutrition Calculator, and check your training readiness before race week with our Should I Train Today checker.

How it works

The calculation

Finish time = swim time + T1 + bike time + T2 + run time.

  • Swim: pace per 100m × (swim distance ÷ 100)
  • Bike: (bike distance ÷ speed) × 3600 seconds
  • Run: pace per km × run distance in km
  • T1/T2: this site's planning defaults for each distance, not a published average

Imperial inputs are converted before calculation. Swim pace per 100yd is multiplied by 1.0936 to get pace per 100m. Run pace per mile is divided by 1.60934 to get per km. Bike speed in mph is multiplied by 1.60934.

Use your race-day average speed for bike. This is typically 5 to 10% slower than your training speed due to fatigue, nutrition stops and course variation.

Frequently asked questions

How long does an Ironman 70.3 take?

Average age-group finish time for Ironman 70.3 is 5:30 to 6:30. Competitive athletes finish in 4:15 to 5:00. Beginners typically finish in 6:30 to 8:00. The cutoff is 8:30 from race start. Use the calculator above with your current swim/bike/run paces for a personalised prediction.

What is the Ironman cutoff time?

The standard full Ironman cutoff is 17 hours from race start. Individual discipline cutoffs: swim 2:20, swim+bike 10:30. To finish under 17 hours, you need approximately 3:30/100m swim pace, 20 km/h (12.4 mph) bike speed, and 8:00/km run pace (12:52 per mile).

How do I estimate my triathlon transition time?

Typical transition times: T1 (swim-to-bike) takes 3 to 8 minutes including wetsuit removal, helmet, shoes, and bike mount. T2 (bike-to-run) takes 2 to 5 minutes for shoe change and gear drop. Fast transitions can save 5 to 10 minutes vs slow ones. Practice transitions in training.

How accurate is a triathlon time calculator?

Calculators are accurate within 5 to 10% for experienced triathletes who enter recent training data. First-time racers should add 10 to 15% buffer. Key inaccuracies: open water swim is slower than pool, bike speed varies by terrain, and run pace after cycling is slower than standalone running.

How do I calculate triathlon finish time?

Add your swim time (pace × distance ÷ 100), bike time (distance ÷ speed × 60), run time (pace × distance), and transition times. For an Olympic triathlon at 2:00/100m swim, 30 km/h (18.6 mph) bike, 6:00/km run (9:39 per mile): 30min swim + 80min bike + 60min run + 4.5min transitions = 2:54:30 total.

What is a good triathlon finish time for a beginner?

For a Sprint triathlon (750m/20km/5km), a good beginner finish time is 1:30 to 2:00. For an Olympic distance (1500m/40km/10km), expect 3:00 to 4:00 for your first race. These times assume basic fitness with 3 to 4 months of specific triathlon training.

How long does each discipline take in a triathlon?

In a typical Olympic triathlon for an intermediate athlete: swim 25 to 35 minutes, T1 2 to 3 minutes, bike 1:10 to 1:30, T2 2 to 3 minutes, run 50 to 65 minutes. The bike leg accounts for roughly 50 to 55% of total race time.

How much time do transitions add to triathlon finish time?

This site plans with 2 to 4 minutes for T1 (swim to bike) and 1.5 to 3 minutes for T2 (bike to run), scaling with race distance. Those are our planning allowances, not a published average: no federation issues one. Fast transitions of 60 to 90 seconds are possible with practice, and over an Ironman slow transitions can add 10 to 15 minutes.

Does swim pace per 100m or per 100yd matter?

1:45 per 100 yards is approximately 1:55 per 100 metres, about 10 seconds per 100 slower. Open water courses use metres. Pool training often uses yards in the US. Toggle to imperial mode to enter pace per 100yd.

What bike speed should I use for triathlon calculation?

For planning, use your average speed including climbs, not your flat-road speed. Most amateur triathletes average 25 to 30 km/h on an Olympic course. On a 70.3, expect 28 to 33 km/h for intermediate athletes with a road or triathlon bike.

How do I calculate my run pace for triathlon?

Your triathlon run pace will be 15 to 30 seconds per km slower than your standalone 10km race pace, due to accumulated fatigue from swimming and cycling. For an Ironman marathon, expect to run 45 to 90 seconds per km slower than your open marathon pace.

What are T1 and T2 in triathlon?

T1 is the first transition, from swimming to cycling. T2 is the second transition, from cycling to running. Both transitions are timed and count toward your official finish time. Transition areas are set up before the race with your bike, helmet, shoes, and run gear.