Water Intake Calculator

A general guideline is half your body weight in ounces. A 160-lb person should drink about 80 oz (2.4 liters). This increases with exercise, hot weather, and altitude. Most adults need 2-3.5 liters per day.

Yes, coffee and tea contribute to hydration despite being mild diuretics. The water content more than offsets the diuretic effect. However, water and herbal tea are the best choices for hydration.

Dark yellow urine, thirst, dry mouth, fatigue, headache, dizziness, and decreased urine output. By the time you feel thirsty, you may already be mildly dehydrated.

The Water Intake Calculator is an online tool that lets you calculate your recommended daily water intake based on weight and activity. It is part of NexTool's collection of free tools designed to help you work faster and more efficiently.

Using the Water Intake Calculator is simple: visit the tool page, enter your data or input into the provided fields, and get instant results. Follow the controls on the page. Some functions require sign-in or a paid plan; see Pricing for limits.

The Free plan includes 10 tool uses per day. Some features require an account or a paid plan. Check the controls on the tool page and Pricing for the applicable limits.

The Water Intake Calculator returns results based on the inputs and the tool methodology. Check assumptions, units and source dates. Treat projections as estimates. For critical decisions, always consult a qualified professional.

Yes, the Water Intake Calculator is fully responsive and works perfectly on smartphones, tablets, and desktop computers. Simply open NexTool in your mobile browser and navigate to the tool — no app download required.