Human Calculators
Daily water intake calculators for adults — men, women, elderly, weight-based, and weather-based.
Most popular in Human Calculators
Adult Daily Water Intake
Personalized daily water target for healthy adults, adjusted for weight, activity, and climate.
Open calculatorElderly Water Intake (65+)
Daily hydration target for older adults, with a safe minimum floor and climate adjustments.
Open calculatorWater Intake for Weight Loss
Higher-end daily target with pre-meal water boost that supports satiety and weight loss.
Open calculatorExplore the full library
Water Intake for Height 167 cm
Daily hydration target for a 167 cm tall adult.
OpenWater Intake for Height 170 cm
Daily hydration target for a 170 cm tall adult.
OpenWater Intake for Height 173 cm
Daily hydration target for a 173 cm tall adult.
OpenWater Intake for Height 176 cm
Daily hydration target for a 176 cm tall adult.
OpenWater Intake for Height 179 cm
Daily hydration target for a 179 cm tall adult.
OpenWater Intake for Height 182 cm
Daily hydration target for a 182 cm tall adult.
OpenWater Intake for Height 185 cm
Daily hydration target for a 185 cm tall adult.
OpenWater Intake for Height 188 cm
Daily hydration target for a 188 cm tall adult.
OpenWater Intake for Height 191 cm
Daily hydration target for a 191 cm tall adult.
OpenWater Intake for Height 194 cm
Daily hydration target for a 194 cm tall adult.
OpenWater Intake for Height 197 cm
Daily hydration target for a 197 cm tall adult.
OpenWater Intake for Height 200 cm
Daily hydration target for a 200 cm tall adult.
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Choose the one that matches your situation from the grid above.
Enter a few details
Weight, activity, climate, species — takes under 30 seconds.
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A research-backed daily target plus an hourly schedule.
Learn the science behind human calculators
Read our in-depth guides for research-backed context on every calculator here.