Triathlon Time Calculator: Swim, Bike & Run Pace
Calculate a triathlon time scenario from swim pace, average bike speed, run pace and two transition times. Distances are entered separately so you can use the course you are planning. The result assumes you maintain the entered averages.
How to calculate triathlon time
Swim seconds = distance in meters / 100 x pace in seconds per 100 meters. Bike seconds = distance in kilometers / speed in kilometers per hour x 3600. Run seconds = distance in kilometers x pace in seconds per kilometer.
Add the three leg times and both transitions to obtain the total. A faster pace means fewer seconds per unit distance, while a faster bike speed means more distance per hour. Do not enter kilometers per hour into a pace field.
Worked example
Enter Swim distance (meters) 1500, Swim pace minutes per 100 m 2 and Swim pace seconds per 100 m 0. Enter Bike distance (km) 40 and Average bike speed (km/h) 30. Enter Run distance (km) 10, Run pace minutes per km 5 and Run pace seconds per km 0.
Set Transition 1 minutes to 2 and Transition 2 minutes to 1, with both transition seconds at 0. Select Calculate triathlon time. The swim takes 30 minutes, bike 1 hour 20 minutes and run 50 minutes. Including three transition minutes, total time is 2:43:00.000.
Use the actual course distances
Race categories can have conventional distances, but actual events may vary. Enter the distances supplied by the organizer rather than relying on the event name. Swim distance uses meters; bike and run use kilometers. Convert any mile-based course information before entering it.
The tool does not include course cutoffs, penalties, start delays or timing adjustments automatically. Add only the transition durations you intend to model. Its output is a sum of entered assumptions, not an official result.
Choose realistic average pace inputs
A pace from a short standalone effort may not be sustainable during a triathlon. Terrain, wind, water conditions, equipment, fatigue and pacing choices can change each leg. Swimming, cycling and running are calculated separately without a fatigue model connecting them.
For the cycling leg, use a whole-leg average speed consistent with the time you want to estimate. Averaging segment speeds directly can be misleading when segments take different amounts of time. This tool does not import activities or remove stopped time.
Include transitions consistently
Transition 1 represents the time between swim and bike, and Transition 2 the time between bike and run. Define their boundaries consistently with the timing approach you are comparing. Equipment changes and travel through transition areas can affect those durations.
Entering zero excludes transition time from the total. A detailed result can help you see each assumption separately, but it does not recommend how to hurry transitions or establish a safe race plan.
Related calculations and limits
For general average speed across multiple sections, use the Average Speed Calculator. For rowing splits, use the Rowing Pace Calculator; its 500-meter pace unit differs from the swim unit used here.
Swim distance must be greater than zero up to 100000 meters; bike distance up to 1000 km; run distance up to 500 km. Bike speed must be greater than zero up to 200 km/h. Pace minutes are whole numbers from 0 to 60, transitions from 0 to 180, and all seconds must be from zero to below 60. Swim and run pace must be positive. These are software limits, not training recommendations.
For a step-by-step walkthrough, read How to Calculate Triathlon Time: Swim, Bike, Run and Transitions.
Privacy
Calculations run locally in your browser using floating-point arithmetic. This calculator does not save or transmit your entries. The hosting website may use separate analytics or advertising services.
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