HydrateWise

How the hydration estimate works

Transparent assumptions behind the HydrateWise daily fluid estimate.

HydrateWise converts weight to kilograms and applies a baseline of 31–35 ml per kilogram, followed by broad adjustments for activity, climate and the selected planning goal. It converts the result into litres, cups and an optional waking-hour pace.

Important limitations

The model does not measure hydration, sweat rate, food-derived water, electrolytes, illness or organ function. Decimal outputs are rounded planning estimates. They are not a prescription and should not override clinical advice.

Why the settings are broad

Activity and climate categories make assumptions visible and editable. They cannot represent every workout or environment. Recalculate when the day changes and use the planner to compare practical serving sizes.