title: MDCalc
text: # MDCalc
  
  MDCalc is a free online medical reference for healthcare professionals that provides point-of-care clinical decision-support tools, including medical calculators, scoring systems, and algorithms. MDCalc is also a mobile and web app. The decision-support tools are based on published clinical research, and MDCalc’s content is written by physician authors.
  
  ## History
  
  MDCalc was founded by two emergency physicians, Graham Walker, MD, and Joseph Habboushe, MD, MBA, and provides over 500 medical calculators and other clinical decision-support tools.
  
  The MDCalc.com website was launched in 2005. In 2016, MDCalc launched an iOS app, followed by an Android app in 2017. A 2017 survey estimated 65% of U.S. attending physicians and 79% of U.S. resident physicians use MDCalc regularly.
  
  