Optimize Your
Triathlon Performance
Free calculators and tools to help triathletes optimize nutrition, hydration, and race-day performance.
Triathlon Nutrition Supplements
Essential supplements including electrolytes, BCAAs, and energy gels for optimal race performance.
Triathlon Diet Basics
Balance your macros with high-quality carbs, lean proteins, and healthy fats for endurance training.
Triathlon Calculators
What is a triathlon calculator?
A triathlon calculator is a free online tool that turns your body weight, race distance, pace, weather and sweat profile into per-hour carbs, fluid and sodium targets — plus predicted split times and finish time. MyTriathlonCalculator covers pace, nutrition, hydration, sweat rate, carb loading and race planning in under a minute per tool. No sign-up. No email required.
- • Pace: predict your swim, bike and run splits
- • Nutrition: get gel and drink-mix counts per hour
- • Hydration: fluid and sodium targets by weather
- • Sweat rate: personal fluid loss per hour
- • Race time: predicted finish time by distance
- • Carb loading: pre-race carb targets over 3 days
Free triathlon calculators
Browse all 31 tools in the triathlon calculator hub, or go straight to a specific calculator below.
New to Triathlon? Find Your Perfect Distance
Not sure which triathlon distance to tackle first? Take our quick quiz to get a personalized recommendation based on your fitness level and goals.
Race Distance Quiz
What's your current fitness level?
Select Your Race Distance
Choose your triathlon distance to get personalized nutrition and fueling recommendations
The will to win means nothing without the will to prepare.
— Holly Lawrence, Ironman 70.3 World Champion
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Find Content Perfect for Your Level
Whether you're a beginner just starting out or an advanced athlete looking to optimize performance, we've organized all our content by experience level.
Beginner
Perfect for those new to triathlon or just starting their journey
Intermediate
For athletes with some triathlon experience looking to improve
Advanced
For experienced triathletes seeking to optimize performance
Frequently Asked Questions
Your biggest challenge isn't someone else. It's the ache in your lungs and the burning in your legs, and the voice inside you that yells 'can't', but you don't listen.
— Jan Frodeno, Olympic and Ironman World Champion
Have more questions? Check out our calculator tools or reach out to us directly.
Explore Our Resources
Discover comprehensive guides, calculators, and tips for triathlon success