Dehydration percent calculator

Compare a known session-loss estimate against body weight before you move on to a rehydration plan.

Use this after Sweat Rate or a known workout note. It is a planning aid for relative context, not medical advice.

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How to use

  1. Start with a known session-loss estimate in liters.
  2. Enter starting body weight to see the loss as a relative percentage.
  3. Move to Rehydration Plan once that relative context is clear.

Wave 52 expansion

Add relative body-weight context before recovery planning

This page sits after Sweat Rate and before Rehydration Plan. It answers one narrower question: how large is that session loss when you compare it against starting body weight?

Compare a known session-loss estimate against body weight.

How to choose between nearby pages

Use Water Intake when the daily baseline is still unknown. Use Hydration Schedule when timing is the next task. Use Sweat Rate when the workout loss estimate itself is still unknown. Use this page when the loss estimate is already known and you want relative body-weight context before moving into Electrolyte Needs for drink-composition priority or Rehydration Plan for replacement timing.

FAQ

What does this page calculate?

It compares a known session-loss estimate against starting body weight and shows the percentage body-mass change.

When should I use this instead of Sweat Rate?

Use Sweat Rate when the loss estimate itself is still unknown. Use this page after the loss estimate is already known and the next job is judging its relative size against body weight.

When should I use this instead of Rehydration Plan?

Use Rehydration Plan when you already know the loss amount and need to split recovery drinking across the next hours. Use this page when you want the relative percentage context first.

What is stored in the share URL?

The share URL stores starting body weight, unit, and session loss in liters.