WaterDailyGoal

For lifters and athletes

Bodybuilding Water Intake Calculator

Quick answer

WaterDailyGoal uses 33 ml/kg for a beverage planning estimate. The 30–40 ml/kg scenarios and activity/climate coefficients are site assumptions, not validated personal requirements or NAM/EFSA formulas. Electrolytes are not automatic. Long or heavy sweating and vomiting or diarrhea need different approaches; food, losses and medical restrictions matter. Ask a clinician or pharmacist when illness is involved.

Quick startPick a day type
Used for the base estimate
Activity level
ClimateWhere you spend your day
Fine-tuneMeasure in bottles · Your day
Life stageOptional
Measure in bottlesOptional
Optional - see what's left
glasses
Your dayShapes the sip schedule

Saved profile

Save this setup to resume tomorrow on this browser.

Your daily goal: 4.0 Litres, 16 glasses.

Your daily goal

Updates instantly
4.0Litres

of water a day · about 16 glasses · 8 half-litre bottles

Planning scenarios: 3.7-4.6 Litres. Use it as a flexible target, not a medical limit.

Start

3 glasses

7:00 AM

Taper

9:00 PM

for better sleep.

Food fluid

+1.0 L

typical food water

4.0
Litres
135
Ounces
16
glasses
Why this number

WaterDailyGoal uses 33 ml/kg for a beverage planning estimate. The 30–40 ml/kg scenarios and activity/climate coefficients are site assumptions, not validated personal requirements or NAM/EFSA formulas. Pregnancy, breastfeeding, and GLP-1 medicines do not automatically change this estimate. Population total-water references include food; they are not minimum drinking doses. Follow individual clinical advice.

Full methodology

Next step

Your sip schedule

  • 7:00 AM · Start the day3 glasses
  • 9:48 AM · Top up3 glasses
  • 12:36 PM · Top up2.5 glasses
  • 3:24 PM · Top up2.5 glasses
  • 6:12 PM · Top up2.5 glasses
  • 9:00 PM · Wind down2.5 glasses

Ease off after 9:00 PM for better sleep.

Electrolytes? Consider sweat losses

Electrolytes are not automatic. Long or heavy sweating and vomiting or diarrhea need different approaches; food, losses and medical restrictions matter. Ask a clinician or pharmacist when illness is involved.

A friendly estimate for healthy adults, not medical advice. Your needs rise with heat, exercise, illness, pregnancy, and some medications. Don't drink more than ~1 litre per hour.

Your daily goal

4.0 Litres

The link and preview image include your weight and settings.

Maintained by the WaterDailyGoal TeamLast updated Editorial update; not a medical review.

Why lifters need more water

Skeletal muscle is water-rich, and strength training raises fluid turnover through sweat, higher food intake, and recovery demands.

The practical point is performance. Starting a session mildly dehydrated can make the same weight feel heavier and reduce quality work.

How to hit the target

This tool does not plan water loading, cutting or peak-week manipulation. Discuss these practices with a qualified sports clinician; a calculator or coach cannot establish their safety.

  • Spread the goal across the day instead of catching up late.
  • Add fluid around long or sweaty training sessions.
  • Electrolytes are not automatic. Long or heavy sweating and vomiting or diarrhea need different approaches; food, losses and medical restrictions matter. Ask a clinician or pharmacist when illness is involved.
  • Keep urine pale straw, not perfectly clear.

Frequently asked

How much water should a bodybuilder drink?

WaterDailyGoal uses 33 ml/kg for a beverage planning estimate. The 30–40 ml/kg scenarios and activity/climate coefficients are site assumptions, not validated personal requirements or NAM/EFSA formulas.

Does drinking more water build muscle?

Water does not build muscle by itself, but even mild dehydration can reduce strength, power, endurance, and recovery quality. Good hydration supports the training that builds muscle.

What about peak week?

This tool does not plan water loading, cutting or peak-week manipulation. Discuss these practices with a qualified sports clinician; a calculator or coach cannot establish their safety.

Sources

  • 1.U.S. National Academies (IOM/NAM), 2005 — Adequate total water intake of about 3.7 L/day for men and 2.7 L/day for women, including water from food and all beverages.Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate, Summary: water adequate intakes; drinks and food
  • 2.U.S. Geological Survey (USGS) — The human body is about 60% water by weight.
  • 3.Mayo Clinic — General guidance of roughly 2.7–3.7 L of total fluids a day, with thirst and pale-yellow urine as everyday checks.