Water intake calculator

Daily intake
In liters
Glasses (8 oz)

Baseline: ~½ oz per lb body weight. Add ~12 oz per 30 min activity. Multiply by climate factor.

About this tool

Water intake calculator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.

Category: Health & Fitness. Browse more Health & Fitness tools.