Urology Nephrology calculators
19 calculators BUN/Creatinine Ratio Calculator Find your BUN-to-creatinine ratio from BUN, urea, or international units (mmol/L, umol/L). See the normal 10 to 20 band, prerenal vs intrinsic clues, and full steps.
Open Creatinine Clearance Calculator Estimate creatinine clearance with Cockcroft-Gault from age, weight, sex and creatinine. Switch units, pick actual, ideal or adjusted body weight, and see BMI and BSA.
Open Adrenal Washout Calculator: Adenoma vs Non-Adenoma CT Calculate absolute and relative adrenal washout percentages from CT Hounsfield Units. Classify adrenal nodules as likely adenoma or non-adenoma with interpretation.
Open Albumin-to-Creatinine Ratio (ACR) Calculator Calculate your urine ACR in mg/g or mg/mmol, see your KDIGO 2024 albuminuria category (A1, A2, A3), and understand what it means for kidney health.
Open Bladder Volume Calculator Calculate bladder volume from ultrasound dimensions using shape-specific ellipsoid formulas. Includes postvoid residual (PVR) interpretation and normal ranges.
Open EORTC Bladder Cancer Recurrence and Progression Calculator Calculate EORTC recurrence and progression risk scores for non-muscle-invasive bladder cancer. Get 1-year and 5-year probability estimates with risk categories.
Open FENa Calculator (Fractional Excretion of Sodium) Calculate FENa (fractional excretion of sodium) to differentiate prerenal azotemia from acute tubular necrosis. Includes FEUrea for patients on diuretics.
Open FEUrea Calculator - Fractional Excretion of Urea Calculate fractional excretion of urea (FEUrea) to differentiate prerenal from intrinsic AKI. Supports mg/dL and mmol/L units with clinical interpretation.
Open GFR Calculator - Estimated Glomerular Filtration Rate Calculate your estimated GFR using the 2021 CKD-EPI creatinine equation. Get your eGFR, KDIGO stage, and kidney function percentage instantly.
Open Kidney Failure Risk Calculator (KFRE) Calculate your 2-year and 5-year kidney failure risk using the validated KFRE. Use the 4-variable model (age, sex, eGFR, ACR) or add serum labs for 8 variables.
Open Kidney STONE Score Calculator for Percutaneous Nephrolithotomy Calculate the STONE nephrolithometry score for percutaneous nephrolithotomy (PCNL). Predicts stone-free outcome probability from CT scan data in seconds.
Open Kt/V Calculator (Daugirdas) Calculate Kt/V with the Daugirdas second-generation formula. Enter pre/post BUN, session time, ultrafiltration volume and post-dialysis weight for the dialysis dose.
Open Metastatic Prostate Cancer Prognosis Calculator Estimate 5-year overall survival for metastatic castration-resistant prostate cancer using the PREVAIL 11-variable model. Includes survival curve and risk tier.
Open Protein Creatinine Ratio Calculator Calculate the urine protein to creatinine ratio (PCR/UPCR) from a spot urine sample. Get your proteinuria category, KDIGO stage, and plain-English interpretation.
Open PSA Density Calculator Calculate PSA density from prostate dimensions (length, width, height) and a serum PSA value. Includes age-stratified risk thresholds and clinical guidance.
Open PSA Doubling Time Calculator Calculate PSA doubling time (PSADT) from two serial PSA readings. Get doubling time in months, PSA velocity, risk category, and a growth projection chart.
Open TTKG Calculator: Transtubular Potassium Gradient Calculate the transtubular potassium gradient (TTKG) to assess renal potassium handling. Interprets results for hypokalemia and hyperkalemia with clinical guidance.
Open Urine Output Calculator Calculate urine output in ml/kg/hr for adults and children, check fluid balance, and flag oliguria, polyuria, or KDIGO AKI staging in seconds.
Open URR Calculator - Urea Reduction Ratio Calculate Urea Reduction Ratio (URR) and corresponding Kt/V instantly. Enter pre- and post-dialysis BUN levels in any unit to check hemodialysis adequacy.
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