https://www.camelbak.com/en/hydrated/hydration-calculator

https://www.h4hinitiative.com/tools/hydration-calculator

Learn about ID50 ->> The lethal dose 50% (LD50) is the number of organisms required to kill 50% of the hosts, and the infectious dose 50% (ID50) is the number of organisms required for 50% of the population to show signs of infection.