Sports
Triathlon Leg Time Budget Calculator
Convert swim pace, bike speed, and run pace to leg times, add transitions, apply contingency, measure discipline shares, and compare the adjusted finish with the cutoff.
Swim leg time-
Bike leg time-
Run leg time-
Moving time-
Transition time-
Base finish budget-
Contingency time-
Contingency-adjusted finish-
Cutoff buffer-
Swim share of base finish-
Bike share of base finish-
Run share of base finish-
Decision view
Five-zone race clock and cutoff gate
Five-zone race clock and cutoff gateSwim, T1, bike, T2, run, contingency, and remaining cutoff buffer form one live elapsed-time course strip.
Exact scenario comparisonBike average speed (km/h) changes while all other entered assumptions remain constant.
| Bike average speed (km/h) | Swim leg time | Bike leg time | Run leg time | Moving time | Transition time | Base finish budget | Contingency time | Contingency-adjusted finish | Cutoff buffer | Swim share of base finish | Bike share of base finish | Run share of base finish |
|---|
How to use Triathlon Leg Time Budget Calculator
- Use race-course distances rather than nominal category labels.
- Enter sustainable average pace or speed including normal course variation.
- Budget both transitions and an explicit contingency before comparing with the cutoff.
Calculator guide
Understanding Triathlon Leg Time Budget Calculator
A triathlon finish is the sum of three differently measured disciplines, two transitions, and execution uncertainty. Converting every component to minutes makes the cutoff and the real source of time pressure visible.
Detailed calculation process
Detailed triathlon leg, transition, contingency, and cutoff calculation
The default race uses a 1.5 km swim, 40 km bike, 10 km run, seven transition minutes, 5% contingency, and a four-hour cutoff.
General formula: T_s=10*D_s*p_sT_b=60*D_b/v_bT_r=D_r*p_rT_m=T_s+T_b+T_rT_t=T_1+T_2T_0=T_m+T_tB=T_0*cT_f=T_0+BM=T_c-T_f All disciplines are converted to minutes before transitions and whole-race contingency are added. Cutoff buffer is evaluated last.
What each symbol means
Worked substitution with the default inputs
The default plan finishes in 180.6 minutes with 59.4 minutes of modeled cutoff buffer.
Worked situations
Practical examples
- The default 1.5 km swim at 2:00/100 m takes 30 minutes.
- Forty kilometres at 30 km/h takes 80 minutes and the 10 km run at 5:30/km takes 55 minutes.
Better inputs
Useful tips
- Use separate cases for calm and adverse course conditions.
- Include long transition runs in T1 or T2.
- Check intermediate cutoffs as well as the final event cutoff.
Before relying on the result
Limitations and common mistakes
- Each leg uses one constant average pace or speed.
- Contingency is a percentage of the full base plan rather than discipline-specific delay.
- Elevation, weather, drafting rules, nutrition, mechanicals, congestion, and health are excluded.
Reference
Key terms
- Transition
- Elapsed time between timing mats or disciplines.
- Base finish
- Three leg times plus both transitions before contingency.
- Cutoff buffer
- Event cutoff minus contingency-adjusted finish.
Important note
Confirm official course distances, timing rules, intermediate cutoffs, safety requirements, and personal readiness with current event information.
Frequently asked questions
Why apply contingency to transitions too?
The entered percentage is a whole-race execution allowance; use zero and add discipline-specific time manually if a different model is needed.
What does a negative cutoff buffer mean?
The modeled finish exceeds the entered cutoff by that many minutes.
Does bike speed include stops?
Use an average that matches how the event records elapsed leg time.