[140- věk (roky)] x hmotnost (kg) CLcr( ml/ min) = --------------------------------------------- (x 0, 85 u žen) 72 x hladina kreatininu v séru (mg/ dl)
[140- vecums (gadi)] x svars (kg) KLkr (ml/ min) = ----------------------------------------- (x 0, 85 sievietēm) 72 x seruma kreatinīns (mg/ dl)