Private · instant · no sign-up

Water Intake Calculator

Estimate a daily hydration target from weight and activity.

General guidance only

This estimate does not diagnose a condition or replace advice from a doctor, dietitian or pharmacist.

Your estimateReady when you are

Enter your details and select Calculate to see a general starting point.

Keep exploring

Other self-care tools

Estimate body mass index from your height and weight.

Estimate body-fat percentage using basic measurements.

Estimate daily calories using age, height, weight and activity.