Water Intake Calculator
Find your personalised daily water intake recommendation based on your weight and activity level — in litres, millilitres and cups.
What Does This Tool Do?
Find your personalised daily water intake based on body weight, activity level and climate. More accurate than the generic "8 glasses a day" rule.
Key Features
Personalised
Based on weight, activity and climate.
Climate Factor
Adjusts for hot or humid environments.
Multiple Units
Litres, mL and cups (237mL).
Instant
Immediate recommendation.
How to Use
- Enter your weight in kilograms.
- Select your activity level.
- Select your climate.
- Click Calculate Water Intake.
Frequently Asked Questions
Is "8 glasses a day" accurate?▾
Not for everyone — needs vary by weight, activity and climate. This calculator gives a personalised estimate based on medical guidelines.
Does this include water from food?▾
No — this is total fluid intake. About 20% of daily water typically comes from food. You can subtract ~500mL if you want drink-only intake.
What formula is used?▾
Base intake = Weight (kg) × 35mL × activity factor, plus a climate adjustment. Based on EFSA and WHO hydration guidelines.
Complete Guide to Water Intake Calculator
When To Use This Tool
Use Water Intake Calculator whenever you need fast, accurate output without installing software. This tool is designed for speed, clarity, and repeatable results for day-to-day work.
Best Practices for Accurate Results
- Double-check the format of your input before running the tool.
- Test with a small sample first, then process larger data.
- Use Related Tools to verify, convert, or transform the output.
Why Users Prefer AdeDX
AdeDX tools are browser-based, free to use, and built to work across desktop and mobile devices. Most processing happens directly in your browser for fast performance and improved privacy.