Welcome to MDCalc
Browse the library of tools
Trending
MDCalc's new and featured tools.
- Creatinine Clearance (Cockcroft-Gault Equation)Calculates CrCl according to the Cockcroft-Gault equation.
- Weight-based Levothyroxine Dose Calculator for Hypothyroidism in AdultsDetermines a weight-based levothyroxine dose for treatment of primary hypothyroidism.
- CKD-EPI Equations for Glomerular Filtration Rate (GFR)Estimates GFR in CKD patients using serum creatinine, cystatin C, or both.
- Mean Arterial Pressure (MAP)Calculates mean arterial pressure.
- SpO₂/FiO₂ RatioAssesses lung function, particularly in patients with acute respiratory failure.
Browse by Specialty
Browse MDCalc's tools by content specialty.
Explore all tools by specialty, filter by calc purpose, and access everything you need.

A Letter From the Founders: MDCalc Marks 20 Years
Graham Walker, MD and Joe Habboushe, MD.
December 8, 2025 • 5 min read