Water Intake Calculator
Enter your body weight to get a daily water target.
170 lb → 85 oz ≈ 2.5 L.
About the Water Intake Calculator
The Water Intake Calculator uses widely-accepted equations from clinical and sports-science literature to give you a personalized water intake figure. It's intended for general information — not a substitute for a licensed health professional.
Enter honest numbers. Small rounding errors compound quickly in health math, and the Water Intake Calculator is only as accurate as what you put in.
- Adult figures (not calibrated for children)
- Metric and imperial units supported
- Standard, published formulas — no proprietary "magic"
- Instant recalculation to compare scenarios
How to read the result
A single water intake value is a snapshot, not a verdict. Track it weekly rather than daily, and look at the trend line. That is a far more reliable signal of what's happening in your body than any one reading.
If the Water Intake Calculator's result surprises you, don't panic. Re-check your inputs, and — if the number still concerns you — book a conversation with a qualified professional.
Limits of the Water Intake Calculator
Formulas generalize across large populations, so they can be off for individuals with unusual body composition, athletes with high muscle mass, or people with medical conditions. Treat the Water Intake Calculator as a useful data point, not a diagnosis.