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Know what to eat, hour by hour.

The UltraCalcPal blog

Practical fuelling guides for ultra runners and the people who crew them.

Fuelling: How many carbs per hour in an ultra? Ranges, limits and a worked example

LatestFuelling · November 12, 2026 · 5 min readHow many carbs per hour in an ultra? Ranges, limits and a worked exampleCarbs per hour in an ultra: the usual 60 to 90 gram range, why body weight and effort matter, what your gut can absorb and a worked example.