How The Hydration Calculator Works

How the HydraCoach Calculator Works

 The computer built into the HydraCoach bottle is programmed to automatically suggest basic hydration guidelines based on an individual’s weight, which is input in the unit's Setup Mode.  Since each person’s needs are unique, depending upon a number of variables, these values can be adjusted to meet an individual’s specific requirements. The online Hydration Calculator was designed to assist in generating “custom” Personal Hydration Goal (PHG) values that can be used to modify the basic hydration guidelines generated by the HydraCoach Hydration Monitor.

 The formulas used in the online hydration calculator are based off of the research provided by the National Research Council (NRC), which uses a sliding scale of 1 milliliter of water for every calorie burned. The NRC says the average man who burns about 2,900 calories daily needs 2,900 milliliters, or about 12 cups, of water each day. The average woman who burns 2,200 calories daily needs about 2,200 milliliters, or about 9 cups, of water each day.

The number of calories burned by an individual is established based on a persons resting metabolic rate (RMR), which is the number of calories the body requires at rest to simply breath, pump blood and be alive. The RMR is a good baseline estimate for those without access to complex laboratory testing of oxygen consumption and carbon dioxide gas production. The basic formula for estimating RMR at rest is Multiply your weight by 10 calories per pound (22 cals per kg). Based on a person being Sedentary, Average or Active throughout the day, this value is increased by 30%, 50% and 75% respectively.

While it is essential to know how much fluid one should consume to maximize the benefits of proper hydration, it is even more important to actually adhere to recommended hydration guidelines and drink at regular intervals during exercise and throughout the day. HydraCoach is the only device that will automatically calculate, monitor and remind an individual in real time when and how much fluid to drink. 

Source: Mayo Clinic, Consumer Health Tips and Products, June 25,2002

Source: Nancy Clark’s Sports Nutrition Guidebook, Nancy Clark, MS, RD, CSSD, January 2008