OpiCalc

Favorites Specialties Drugs Guidelines Most Used

All Specialties

Favorites Specialties Drugs Guidelines Most Used

Faves Specs Drugs Guides Top

AKI Staging (KDIGO)Anion Gap + Delta-Delta CKD Stage (KDIGO)Creatinine Clearance Electrolyte & Free Water FENa FEUrea KFRE — Kidney Failure Risk Kt/V Dialysis Sodium Correction UACR UPCR Urea Reduction Ratio (URR) Calculator Uric Acid & FEUA Urinary Anion Gap Winter's Formula eGFR (CKD-EPI)

OpiCalc

Easy, fast, and private medical tools for clinicians. Always free.

No Login Required

Ready for the Bedside

Resources

About Us Editorial Policy Medical Disclaimer Privacy Policy Terms of Use Cookie Policy

Support

Clinical Notice:OpiCalc is not a substitute for professional clinical judgment. Always verify dosages and guidelines.

OpiCalc © 2018-2026

•

All Rights Reserved

Specialty Module

Nephrology

eGFR equations, electrolyte correction, and kidney failure risk models.

Toolkit

Clinical Calculators

Peer-Reviewed

AKI Staging (KDIGO)

Anion Gap + Delta-Delta

CKD Stage (KDIGO)

Creatinine Clearance

Electrolyte & Free Water

KFRE — Kidney Failure Risk

Sodium Correction

Urea Reduction Ratio (URR) Calculator

Uric Acid & FEUA

Urinary Anion Gap

Winter's Formula

About

Nephrology

Nephrology requires constant calculation. We provide the latest CKD-EPI equations, the KFRE for kidney failure risk, and a full suite of electrolyte and acid-base tools for acute and chronic renal care.

Covered Areas

eGFR & CKD Staging
Kidney Failure Risk (KFRE)
Acid-Base & Anion Gap Analysis
Electrolyte Correction (Na, K, Ca)

All tools are based on published clinical evidence. Results should be interpreted alongside individual patient presentation and current institutional guidelines.