Triathlon Nutrition Calculator
Build a personalized race-day fueling plan based on your body, conditions, and race distance.
Race & Body
Select your race and enter your weight
Race Conditions
Temperature and sweat rate affect hydration needs significantly
15–25°C / 59–77°F — typical race conditions
Visibly sweaty during hard efforts, wet kit after long sessions
Occasional white marks on kit, some eye stinging on hot days
Enter your body weight above to see your personalized nutrition plan
- • Practice your nutrition plan in training — never try anything new on race day
- • Train your gut to tolerate higher carb intake over weeks
- • Front-load calories on the bike — it's easier to eat and absorb while cycling
- • If your stomach rebels on the run, switch to liquid calories only
- • Caffeine (3–6mg/kg) 45 min before the run leg can boost late-race performance
- • Dual-transport carbs (glucose + fructose) allow absorption up to 90–120g/hr
- • Sodium losses range from 200–1500mg/L of sweat — highly individual
- • Dehydration above 2–3% body weight significantly impairs performance
- • GI distress is the #1 reason for DNF in Ironman — train your gut