Water Intake Calculator: How Much Water by Weight
Free water intake calculator shows how much water to drink per day by body weight, in oz and liters. See charts for 120 to 250 lb and weight-loss hydration.

Lauren Kremer, MS, RD is a registered dietitian based in Berkeley, California. She specializes in gut health, blood sugar management, and sustainable weight loss through personalized, evidence-based nutrition counseling.
Lauren currently works as a Registered Dietitian at Kaiser Permanente. She previously founded her own private nutrition practice focused on gut health, blood sugar, and weight management. Before that, she worked as a dietitian at a microbiome health startup and as a clinical dietitian on the general medicine floor at Montefiore Hospital in the Bronx.
Lauren holds a Master of Science in Clinical Nutrition from New York University (NYU) and completed her dietetics internship at NYU Hospital. She is a Registered Dietitian (RD) credentialed through the Commission on Dietetic Registration.
Free water intake calculator shows how much water to drink per day by body weight, in oz and liters. See charts for 120 to 250 lb and weight-loss hydration.
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