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Calcimator

Ironman Nutrition Plan Calculator

Calculate hourly calorie, carb, sodium, and fluid intake targets for Ironman and long-course triathlon racing.

Inputs

Results

Bike calories/hr

223

Run calories/hr145
Bike carbs/hr (g)56
Run carbs/hr (g)36
Sodium/hr (mg)850
Fluid/hr (mL)850
Total race calories2,027
Total race carbs (g)507
Total sodium (mg)8,976
Total fluid (L)9
Gel equivalents20
Swim Hours1.2
Transition Hours0.24
How to Use This Calculator
  1. Enter your Body Weight in kilograms.
  2. Set your Expected Race Time in hours.
  3. Choose Heat Conditions (Cool, Moderate, or Hot) and your Sweat Rate.
  4. Review Bike Calories/Hour, Run Calories/Hour, Carbs/Hour, Sodium/Hour, and Fluid/Hour targets.
  5. Use Total Race Calories, Total Carbs, Total Sodium, and Gel Equivalents to fill your special needs bags and aid station strategy.
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