A common rule of thumb suggests drinking about half to two thirds of your body weight in pounds as ounces of water per day, adjusted up for exercise. This calculator applies that guideline. It takes your weight, uses roughly half your weight in pounds as a baseline number of ounces, then adds about 12 ounces for every 30 minutes of exercise you log. The result appears in ounces, US cups, and litres so you can use whichever unit suits your bottle or glass. Enter your weight, choose pounds or kilograms, and add your daily exercise minutes to see the adjusted target. Everything is calculated locally in your browser and nothing is uploaded. Fluid needs vary with climate, health, and diet, and drinks and food both contribute, so treat this as a general starting estimate rather than a strict medical requirement.
It bases the estimate on your body weight and adds an allowance for activity, since exercise raises fluid loss.
The daily target is shown in ounces, cups and litres so you can track it however you prefer.
The figure is a general fluid target, and food and other drinks also contribute to your total hydration.
A common rule of thumb suggests drinking about half to two thirds of your body weight in pounds as ounces of water per day, adjusted up for exercise. This calculator applies that guideline.
Yes. Daily Water Intake in Ounces Calculator is completely free, with no sign-up and no usage limits.
Yes. Daily Water Intake in Ounces Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Daily Water Intake in Ounces Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.