Free · Browser-Based · Hydration Planning

Water Intake Calculator

Estimate a practical daily hydration target based on body weight, exercise time, and hot-climate adjustments, then convert it into liters, milliliters, or cups.

Body weight

Weight unit

Exercise time (minutes)

Climate adjustment

Output unit

Rule of thumb

Hydration summary

🎯 Common Use Cases

Set a daily water target

Adjust hydration for workouts

Compare liters and cups quickly

Plan hydration in hot weather

❓ Frequently Asked Questions

Is this a medical prescription?

No. It is a practical estimate, not individualized medical advice.

Does exercise increase the target?

Yes. This tool adds a simple hydration bump based on workout minutes.

Is the calculation local?

Yes. Everything runs in the browser.