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Evidence-Based Medicine: EBM Tools and Calculators

This is a libguide for praticing evidence-based medicine.

EBM Calculators

EBM Calculators (Centre for EBM Toronto)

These calculators were developed by the Evidence-Based Centre in Toronto. They include calculators for statistics and Odds Ratio to NNT Converter. Links for Palm OS EBM Calculators and Pocket PC EBM Calculators are also included.


CATMaker and EBM Calculators (Oxford – Center for Evidence-Based Medicine)

CATmaker is a computer-assisted critical appraisal tool, which helps you create Critically Appraised Topics (CATs), for the key articles you encounter about Therapy, Diagnosis, Prognosis, Aetiology/Harm and Systematic Reviews of Therapy.


Evidence Based Medicine Toolkit (University of Albert)

This is a collection of tools for identifying, assessing and applying relevant evidence for better health care decision-making. The appraisal tools are adapted from the Users' Guides series prepared by the Evidence Based Medicine Working Group and originally published in JAMA.


Diagnostic Tests



Diagnostic Test Calculator by Alan Schwartz of University of Illinois at Chicago


Bayesian Analysis Model (MEDCalc)

Calculates information (e.g. predictive value, likelihood ratio) about diagnostic tests.

Medical calculators

UpToDate Calculators

UpToDate includes calculators to help you quickly and accurately calculate many different medical measurements in specialties.

MedCalc3000 via STAT!Ref (TMC library)

MedCalc 3000 is a computerized medical reference and tool set. MedCalc 3000 encompasses a wide array of pertinent medical formulae, clinical criteria sets and decision tree analysis tools used everyday by clinicians, medical educators, nurses and health care students of all types.


Medcalc performs automatic computation of more than 300 hundred clinical formulas, equations & scores "commonly used" in medical practice. Also includes valuable "point of care information"


A site for medical professionals to do calculations and process algorithms and scores.Calculators are listed by the cateogries for speciality and system.