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URR Calculator – Urea Reduction Ratio for Dialysis
Hemodialysis Adequacy Assessment
Nephrology Guidelines: URR is calculated as $[(Pre\text{-}BUN - Post\text{-}BUN) / Pre\text{-}BUN] \times 100$. KDOQI guidelines recommend a minimum target URR of $\ge 65\%$ per hemodialysis session. Enter pre- and post-dialysis BUN values below.
BUN Laboratory Input Values
Calculation Results
⚠️ Not medical advice. For nephrology, clinical pathology, and medical reference only. Dialysis adequacy evaluation, prescription adjustments, and renal replacement therapy must be supervised strictly by an attending nephrologist or physician.