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Triathlon · Nutrition

Triathlon Race Nutrition Calculator

Calculate carbohydrate, fluid and electrolyte needs for any triathlon distance.

Race nutrition plan

Top picks compared

PickProductBest for
Top pick SiS Beta Fuel Gels (30-Pack) High-carbohydrate isotonic gels — 40g carbs each for long-course triathlon. Check price →
Option Electrolyte Hydration Tabs Sodium and electrolyte replacement tabs for hot-weather triathlon racing. Check price →
Option Triathlon Nutrition Book Carb, protein and electrolyte planning for every triathlon distance. Check price →

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Frequently asked questions

What should I eat during an Olympic triathlon?

1-2 gels or equivalent on the bike and 1 gel on the run is a common plan. At ~40-60g carbs per gel, this gives 60-80g carbs for a 2-2.5 hour race. Start fuelling early (don't wait until hungry) and practise in training.

How much should I drink during an Ironman?

500-800ml per hour depending on conditions. Overdrinking (hyponatraemia) is more dangerous than mild dehydration — don't force fluids beyond thirst. Use sodium-containing drinks or electrolyte tabs to replace salt lost through sweating.