Free calculators and tracking tools built by Jordan Lee, RD. Get your real water intake goal, calculate sweat sodium loss, and rank beverages by hydration power.
Baseline by body weight, climate, activity, altitude, and life stage.
Open Calculator →Compare 80+ beverages by net fluid retention and electrolytes.
Compare Drinks →Fluid targets, citrate recommendations, and dietary adjustments.
Prevent Stones →My mom stopped feeling thirsty at 72. I did not know that was possible. I thought thirst was universal, like breathing or blinking. But aging changes ...
The Miami Heat Wave That Made Me Rethink Everything I Knew About Water I collapsed on the sidewalk outside my apartment building on Brickell Avenue at...
Why My Hydration App Told Me to Drink 8 Glasses a Day—And Nearly Put Me in a Miami ER Jordan Lee I was on my fourth bottle of water by 10 AM when the ...
My Garmin Said I Lost 4 Pounds of Water on a 90-Minute Run. Miami Heat Doesn't Care About Your Watch. 4.2 pounds. That's what my Garmin scale told me ...
I have killed every plant I’ve ever owned. Every single one. A succulent that was supposed to be indestructible? Dead in three weeks. A snake plant th...
I learned about altitude hydration the hard way. I flew from Miami, which is at sea level, to Denver, which is about a mile high, for a weekend of hik...
No. Coffee has a BHI of ~0.98. It hydrates almost as well as water.
Read FAQ →No. It's a myth from a 1945 misinterpretation. Use your real weight and climate.
Read FAQ →White salt stains, stinging eyes, and cramps are telltale signs.
Read FAQ →