Water Intake Calculator

How It Works

The calculator starts from a baseline of about 35 ml of water per kilogram of body weight, which scales your needs to your size. It then adds extra fluid for every block of exercise to replace what you lose through sweat, and increases the total in hot or humid conditions where you perspire more. The result is shown in liters, cups, and ounces so you can track it whichever way is easiest.

Base = Weight (kg) × 35 ml
+ 350 ml per 30 min exercise
+ 10% for hot climates

Examples

Frequently Asked Questions