How do you calculate total systemic clearance and renal clearance?

Total systemic clearance (Cl_total) can be calculated by dividing the dose of a drug administered by the area under the plasma concentration-time curve (AUC) for that drug: Cl_total = Dose / AUC. Renal clearance (Cl_renal) is determined by measuring the rate of drug excretion in urine and the plasma concentration of the drug: Cl_renal = (Urine concentration × Urine flow rate) / Plasma concentration. Both clearances provide insight into how effectively a drug is eliminated from the body, with total systemic clearance reflecting all elimination pathways and renal clearance focusing specifically on kidney function.