Health

Water Intake Calculator

Estimate a daily water target from your body weight and how much you exercise. Results are shown in liters, fluid ounces and cups.

Last updated

Pick your unit first, then enter your weight below.

kg
min

Minutes of activity on a typical day.

Results

Daily water
2.66 L

Total from fluids and food

In fluid ounces
89.9 oz
In cups(8 oz each)
11.2 cups

Breakdown

  • Baseline2.31 L (87%)
  • Exercise add-on0.35 L (13%)

How the estimate works

The calculator scales a baseline amount to your body weight, then adds an allowance for exercise. The result is a sensible daily target rather than a strict rule. Climate, health conditions, pregnancy and medications can all shift your real needs.

Worked example

Suppose you weigh 70 kg and do about 30 minutes of exercise on a typical day.

  1. 1.Baseline (70 kg x 33 ml)2,310 ml
  2. 2.Exercise add-on (30 min)350 ml
  3. 3.Total (2,310 + 350)2,660 ml = 2.66 L

Result: Aim for roughly 2.66 liters of water a day, which is about 89.9 ounces or 11.2 cups.

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