Hydraulic Integrity · Coolant Load
Daily fluid requirement anchored to mass and activity — coolant-tank read.
Required fluid ≈ weight × 0.5 oz + activity × 0.4 oz — the simple rule-of-thumb that survives the ACSM literature. Not medical. Kidney-impaired and endurance athletes need individualized targets.
Part of: Body Composition & Health
How to use
- Enter weight (lbs), today's active minutes, and current intake (oz).
- Tank fills to current intake; colour encodes pressure (green Stable / gold Guarded / magenta Low).
- Read the deficit and close it before the next training window.
Examples
Before you act on the result
Health-related tools are educational planning aids. They can make a number or assumption visible, but they do not diagnose, treat, prescribe, or replace clinician guidance.
If the result points to risk, symptoms, medication questions, or urgent changes, use it as a note for a qualified professional rather than a final decision.
Next up
Frequently asked questions
› Does coffee count?
Yes — caffeinated drinks hydrate on net despite being diuretic. Alcohol does not.
› Is 8 × 8 a real rule? Trust & accuracy
No. The "8 glasses" number has no scientific origin. Anchor to body mass and activity instead.
Tips & related reading
See the Body Composition & Health hub →Tips & how-tos
Relevant links
Related tools
Ion Balance · Electrolyte Loss
Sodium, potassium, chloride, and magnesium lost through sweat over a training session. Replacement targets for endurance events.
Thermal Failure · WBGT
Wet-bulb globe temperature — the heat-stress index used by OSHA, ACGIH, and military for work/rest cycle decisions.
Kinetic Expenditure · MET
Calories burned per activity using the MET (Metabolic Equivalent of Task) method from the Compendium of Physical Activities.