# Daily Water Intake Calculator

> Estimate how much water to drink each day based on weight, activity and climate.

To estimate daily water intake, enter your weight, typical exercise duration and climate. The calculation starts from about 35 millilitres per kilogram of body weight and adds roughly 350 millilitres for every 30 minutes of exercise, adjusted for hot or cold conditions.

**URL:** https://convertto.tech/t/water-intake-calculator
**Category:** Health & Fitness (https://convertto.tech/c/health-tools)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Choose the units.
2. Set the weight.
3. Set the daily exercise.
4. Choose the climate.
5. The result appears immediately — copy or download it.

## FAQ

### Is eight glasses a day actually right?

It has no clear scientific origin and ignores body size, activity and climate. Roughly 30–35ml per kilogram of body weight is a better starting point, and food contributes around a fifth of total intake.

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