Water Deficit Calculator
Very rough teaching model linking scale change to water mass (not clinical).
Use the calculator below, then review the formula, a numeric example, and the reference table to understand how the water deficit model result is produced.
Educational tool only. It does not replace advice from a licensed clinician, dietitian, or exercise physiologist.
Calculator inputs
Result
–
What is this calculator?
Very rough teaching model linking scale change to water mass (not clinical). The formula, a worked example, and a reference table are below. Results are for education only, not medical advice.
How it works
Teaching model: water equivalent (L) ≈ body weight (kg) × percent change × 0.7 (illustrative constant, not clinical).
Example
70 kg, 1% scale change ~0.49 L illustration (hypothetical water mass teaching only).
Reference Table
| Value | Meaning |
|---|---|
| Dehydration | Exam + labs in care |
| Athletes | Weigh-ins educational |
| Illness | Oral rehydration protocols vary |
FAQ
Is this medical advice?
No—seek care for dizziness, orthostasis, or persistent losses.
Scale noise?
Carbs and salt shift water without fat change.
Sauna weight cuts?
Mostly water; dangerous if pushed.
Kidney disease?
Fluid plans are prescription-level.