Renal

Free Water Deficit

Free water deficit in hypernatremia

Calculate FWD

Current Sodium (mEq/L)

Target Sodium (mEq/L)

Weight (kg)

Sex

Age (years)

Estimated glomerular filtration rate using CKD-EPI 2021 equation (race-free)

Estimated creatinine clearance for drug dosing

Differentiates prerenal vs intrinsic renal AKI

In AttendMe.ai, the FWD calculator auto-detects from your clinical questions — alongside evidence from 3M+ peer-reviewed articles.