Sprint Triathlon Training Plan Calculator
Weekly training hours by discipline for sprint distance (750m swim, 20km bike, 5km run) with periodization phases.
About this calculator
This calculator builds a weekly training split by layering three separate adjustments onto your available hours. It starts from a base sprint-distance allocation weighted toward bike and run over swim (40%/35%/25%) since the swim leg is shortest relative to the other two disciplines at sprint distance. Whichever discipline you flag as weakest then gets an 8-percentage-point bonus, pulled evenly from the other two — so strengthening a weak swim, for example, comes at the cost of a little bike and run volume that week, not a change to your total hours.
Your raw weekly hours are then scaled down by a periodization multiplier that depends on how many weeks remain until race day: a sustainable 85% of your stated hours during the base phase (over 8 weeks out), a full 100% during the build phase (4-8 weeks out) when volume peaks, a pulled-back 80% during the 2-3 week peak phase, and a sharp 50% cut during taper week to arrive at the start line recovered rather than fatigued. A separate fitness-level multiplier further caps effective hours for beginners (80%) and intermediates (95%) relative to advanced athletes, since less-trained athletes carry a higher overtraining risk at the same nominal hour count. The resulting numbers are training-load guidance based on generic periodization principles, not a substitute for a coach's assessment of your specific injury history or recovery capacity.
Inputs
Results
Total training hours/week
4.08
How to Use This Calculator
- Enter the number of Weeks Until Race.
- Set your Weekly Hours Available for training across all three disciplines.
- Select your Fitness Level (Beginner, Intermediate, or Advanced).
- Choose your Weakest Discipline to allocate extra training time there.
- Review weekly swim, bike, and run hours, total sessions, rest days, and long session durations.
How the result changes with Weekly hours available
| Weekly hours available | Total training hours/week |
|---|---|
| 3 | 2.04 |
| 4.5 | 3.06 |
| 9 | 6.12 |
| 15 | 10.2 |
What each input means
- Weeks until race
- Number of weeks remaining until your sprint triathlon race day.
- Weekly hours available
- Total hours per week you can dedicate to training across all three disciplines.
- Fitness Level
- Your current triathlon fitness level.
- Weakest Discipline
- Extra training time is allocated to your weakest discipline.
What each result means
- Total training hours/week
- Recommended total training hours this week after periodization adjustments.
- Swim hours/week
- Hours to spend swimming per week.
- Bike hours/week
- Hours to spend cycling per week.
- Run hours/week
- Hours to spend running per week.
- Total sessions/week
- Recommended number of training sessions across all disciplines.
- Rest days/week
- Recommended complete rest days per week.
- Long swim (min)
- Duration of your longest swim session this week.
- Long bike (min)
- Duration of your longest bike session this week.
- Long run (min)
- Duration of your longest run session this week.
- Training phase
- 1 = Base, 2 = Build, 3 = Peak, 4 = Taper.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersWeeks until race = 12, Weekly hours available = 6, Fitness Level = 1, Weakest Discipline = 1 = 4 input(s) provided
- Calculate Total training hours/weekTotal training hours/week = weeklyHoursAvailable * volumeMultiplier * fitnessMultiplier4.08 = 4.08
- Calculate Swim hours/weekSwim hours/week = effectiveHours * splits.swim1.35 = 1.35
- Calculate Bike hours/weekBike hours/week = effectiveHours * splits.bike1.47 = 1.47
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
Why does strengthening my weakest discipline reduce time in the other two?
The calculator works from a fixed total-hours budget for the week, so the 8-percentage-point bonus given to your flagged weakest discipline is pulled evenly (4 points each) from the other two disciplines rather than added on top. Your total weekly hours don't change — only how those hours are distributed among swim, bike, and run.
Why do my weekly hours drop during taper week even though my "weekly hours available" input didn't change?
The calculator applies a periodization multiplier on top of your stated available hours: 85% in the base phase (over 8 weeks out), 100% during the build phase (4-8 weeks out), 80% during peak (2-3 weeks out), and just 50% during taper week (the final week). That taper cut is deliberate — it lets fatigue clear so you arrive at the start line recovered rather than exhausted from training.
Why are my recommended hours lower than my stated availability even outside of taper week?
A separate fitness-level multiplier caps effective training hours below your full stated availability for beginners (80%) and intermediates (95%), since less-experienced athletes carry higher overtraining and injury risk at the same nominal hour count as advanced athletes. Only advanced athletes get the full 100% of both their available hours and the periodization multiplier.
How are the "long session" durations for each discipline determined?
Each discipline's long session is a fixed fraction of that discipline's total weekly hours — 45% for swim, 50% for bike, and 45% for run — converted to minutes. So as your weekly bike hours grow, whether from more total training time or from bike being flagged as your weakest discipline, your recommended long ride grows proportionally with it.
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