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Triathlon · Nutrition

Triathlon Calorie Calculator

Estimate total calories burned across the swim, bike and run legs of a triathlon.

Total triathlon calorie burn

Total calories burned

Top picks compared

PickProductBest for
Top pick Triathlon Energy Gels (Box) Fast-absorbing gels for fuelling the bike and run legs. Race-tested flavours. Check price →
Option Triathlon Nutrition Guide (Book) What to eat before, during and after training and racing. Science-backed. Check price →
Option Hydration Pack (Triathlon) For longer training rides and runs — hands-free hydration. Check price →

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Frequently asked questions

How much should I eat during an Ironman?

Aim for 60-90g of carbohydrates per hour and 500-750ml of fluid per hour on the bike. The run requires less but fuelling remains critical. Practise your nutrition strategy in training — race day is not the time to experiment.

Do I need to fuel during a Sprint triathlon?

Usually not — most athletes can complete a Sprint on stored glycogen. Staying hydrated is important; eating solid food is rarely necessary for the 45-90 minute effort.