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Calcimator

Triathlon Pacing Calculator

Calculate split times for swim, T1, bike, T2, and run from your target finish time across sprint, Olympic, 70.3, and Ironman distances.

Inputs

%

Results

Predicted finish (min)

150

Swim split (min)30
T1 transition (min)1.5
Bike split (min)62.28
T2 transition (min)1
Run split (min)55.22
Bike speed (km/h)38.54
Bike speed (mph)23.95
Run pace (min/km)5.52
Run pace (min/mi)8.89
How to Use This Calculator
  1. Select your Race Distance (Sprint, Olympic, 70.3, or Ironman).
  2. Enter your Target Finish Time in minutes (e.g., 150 = 2h 30m).
  3. Set your Swim Pace in seconds per 100m.
  4. Adjust Bike Effort % to model stronger or weaker bike splits.
  5. Review predicted Swim, T1, Bike, T2, and Run splits, plus required Bike Speed and Run Pace.

How the result changes with Target finish (minutes)

Target finish (minutes)Predicted finish (min)
147147
440440
791791
1,0831,083

What each input means

Race Distance
Select your triathlon race distance.
Target finish (minutes)
Your target total finish time in minutes (e.g., 150 = 2h30m).
Swim pace (sec/100m)
Your swimming pace in seconds per 100 meters. Typical: 90-100s (fast), 120s (moderate), 150s+ (beginner).
Bike effort %
Adjust bike leg effort. 100% = even split. >100% = stronger bike (faster bike, potentially slower run).

What each result means

Predicted finish (min)
Total predicted race time in minutes.
Swim split (min)
Predicted swim leg time in minutes.
T1 transition (min)
Swim-to-bike transition time in minutes.
Bike split (min)
Predicted bike leg time in minutes.
T2 transition (min)
Bike-to-run transition time in minutes.
Run split (min)
Predicted run leg time in minutes.
Bike speed (km/h)
Required average bike speed in km/h.
Bike speed (mph)
Required average bike speed in mph.
Run pace (min/km)
Required run pace in minutes per kilometer.
Run pace (min/mi)
Required run pace in minutes per mile.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Race Distance = 2, Target finish (minutes) = 150, Swim pace (sec/100m) = 120, Bike effort % = 100 = 4 input(s) provided
  2. Calculate Predicted finish
    Predicted finish = swimTimeMin + t1Min + adjustedBikeTime + t2Min + adjustedRunTime
    150 = 150
  3. Calculate Swim split
    Swim split = (race.swim / 100) * swimPace100m / 60
    30 = 30
  4. Calculate T1 transition
    T1 transition = t1BaseSeconds / 60
    1.5 = 1.5

Engine last updated .

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