The Portman Calculator determines fluid and nutrition needs before, during and after your activity for optimum exercise performance. There are two calculators: An EXERCISE CALCULATOR that enables you to compute your needs for a wide range of activities and a TRIATHLON CALCULATOR to calculate your race course nutrition.

The Portman Calculator determines fluid and nutrition needs before, during and after your activity for optimum exercise performance. There are two calculators: An EXERCISE CALCULATOR that enables you to compute your needs for a wide range of activities and a TRIATHLON CALCULATOR to calculate your race course nutrition.

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pounds

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minutes
minutes
minutes
pounds