URR Calculator
Calculate urr — kidney function and GFR estimation.
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Estimated GFR
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CKD Stage
Recent Calculations
What Is URR?
Urr estimates glomerular filtration rate using the Cockcroft-Gault equation and maps it to CKD stages.
Formula
CrCl = ((140 − age) × weight × [0.85 if female]) / (72 × Cr)Frequently Asked Questions
What is GFR?
Glomerular Filtration Rate measures how well your kidneys filter waste. Normal is ≥ 90 mL/min.