About this calculator

A practical baseline is 30–35 mL per kg, adjusted for exercise and hot weather. Food and other drinks also contribute fluid.

Frequently asked questions

What does the Daily Water Intake Calculator do?

Estimate daily fluid needs from weight, activity, climate, pregnancy and breastfeeding. A practical baseline is 30–35 mL per kg, adjusted for exercise and hot weather. Food and other drinks also contribute fluid.

Is the Daily Water Intake Calculator free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the Daily Water Intake Calculator?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified fitness & health professional before committing to a purchase or a job.

What inputs does the Daily Water Intake Calculator need?

Enter values for: Body weight (kg), Exercise (minutes/day), Climate, Pregnancy / breastfeeding. Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the Daily Water Intake Calculator on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.