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Medical Calculators

Welcome to the medical calculators category for physicians and pharmacists. This category features links to medical, clinical and dosage calculators for GFR, eGFR, child pugh score, HbA1c, cardiovascular risk, stroke risk, BSA (body surface area), gentamicin, vancomycin, corticosteroids and more.

Medical Calculators

Source: globalrph.com
Clinical Resource: Calculators
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Last Checked: 17/05/13 Link Error: Report It

 

Medical Algorithms With Calculators

Speciality

  • Cardiology
  • Dermatology
  • Endocrinology, Diabetes, Metabolism
  • Neurology
  • Orthopedics
  • Psychiatry
Source: medicalalgorithms.com
Clinical Resource: Online Calculators and Algorithms
Register to Access Content: Yes - registration is FREE

Last Checked: 19/10/15 Link Error: Report It

 

MDCalc

This is a site for medical professionals to help us do calculations and process algorithms and scores. To make patients better. Faster. You can access the full list through the navigation bars, or, preferably, through the search menu.

Source: mdcalc.com
Clinical Resource: Calculators
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Last Checked: 17/05/13 Link Error: Report It

 

Table for conversions of chemical compounds (such as HDL, LDL, triglyceride, angiotensin, apolipoprotein, C-peptide, glucose and many more) from conventional units to SI units and vice versa

Find below a chemical conversion table containing chemical compounds with factors for conversion from conventional to SI units as well as a calculator for conversions of all listed chemicals and substances.

Source: soc-bdr.org
Clinical Resource: Calculator
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Last Checked: 13/03/14 Link Error: Report It

 

Body Surface Area Calculator

DuBois and DuBois Formula

Source: crab.org
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Body Surface Area Calculator for medication doses

Calculates Body Surface Area for medication doses and includes descriptive statistics.

Source: halls.md
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Body Surface Area Calculator

Source: med.stanford.edu
Clinical Resource: Calculator
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Last Checked: 20/08/15 Link Error: Report It

 

Body Surface Area Calculator (Mosteller)

Source: patient.co.uk
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Adult BMI, Ideal Body Weight, and BSA Calculator

Source: pharmacologyweekly.com
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Glasgow Coma Scale (GCS)

This gives a reliable, objective way of recording the conscious state of a person. It can be used by medical and nursing staff for initial and continuing assessment. It has value in predicting ultimate outcome.

Source: patient.co.uk
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Framingham Heart Study
Risk Functions

Risk prediction estimates for the risk of various cardiovascular disease outcomes in different time horizons are available as score sheets and direct risk functions. The choice of the appropriate risk prediction algorithm should take into account the following components: cardiovascular outcome, population of interest, time horizon, and risk factors. Outcome specific algorithms preceded by the descriptions of the above four components are available for the following:

  • Atrial Fibrillation (10-year risk) and Calculator
  • Cardiovascular Disease (10-year risk) and Calculator
  • Cardiovascular Disease (30-year risk) and Calculator – HCVD
  • Congestive Heart Failure
  • Hard Coronary Heart Disease (10-year risk) and Calculator
  • Coronary Heart Disease (10-year risk)
  • Recurrent Coronary Heart Disease
  • Coronary Heart Disease (2-year risk) – Second Event
  • Diabetes
  • Hypertension and Calculator
  • Intermittent Claudication
  • Stroke
  • Stroke after Atrial Fibrillation and Calculator
  • Stroke or Death after Atrial Fibrillation and Calculator
Source: framinghamheartstudy.org
Clinical Resource: Algorithms
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Last Checked: 22/11/13 Link Error: Report It

 

UK Prospective Diabetes Study Risk Engine

Risk calculators based on equations from the Framingham Heart Study tend to underestimate risks for people with diabetes as this study included relatively few diabetic subjects. The UKPDS Risk Engine is a type 2 diabetes specific risk calculator based on 53,000 patients years of data from the UK Prospective Diabetes Study, which also provides an approximate 'margin of error' for each estimate.

Source: dtu.ox.ac.uk
Clinical Resource: Calculator
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Last Checked: 22/04/13 Link Error: Report It

 

The University of Edinburgh
Cardiovascular Risk Calculator

Risk scores are for estimating the probability of cardiovascular disease for individuals who have not already developed major atherosclerotic disease. They are an aid to making clinical decisions about how intensively to intervene on lifestyle and whether to use antihypertensive, lipid lowering medication and aspirin.

The calculator can produce risk scores based on the following calculations:

  • Framingham
  • Joint British Societies (JBS) / British National Formulary (BNF)
  • ASSIGN
Source: cvrisk.mvm.ed.ac.uk
Clinical Resource: Calculator
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Last Checked: 22/04/13 Link Error: Report It

 

HeartScore: cardiovascular disease (CVD) risk assessment and management
The interactive tool for predicting and managing the risk of heart attack and stroke

HeartScore is aimed at supporting clinicians in optimizing individual cardiovascular risk reduction. It is the electronic and interactive version of the SCORE (Systematic Coronary Risk Evaluation) risk charts, published by the European Society of Cardiology.

Source: heartscore.org
Clinical Resource: Tool
Register to Access Content: Yes - registration is FREE

Last Checked: 22/04/13 Link Error: Report It

 

JBS3 Risk Calculator
Joint British Societies for Prevention of Cardiovascular Disease

The JBS3 risk calculator is a tool to help communicate the risk of CVD and the benefits of interventions, whether they are lifestyle or pharmacological.

The JBS3 Risk Calculator with its new measures and communication tools aims to empower patients to make appropriate decisions about their lifestyle and drug treatments based on a better understanding of their personal cardiovascular disease (CVD) risks. It helps GPs and Clinicians to address three key questions for their patients:

  • Why should I start CVD risk reduction?
  • When should I start?
  • What should I do?
Source: jbs3risk.com
Clinical Resource: Calculator
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Last Checked: 19/08/15 Link Error: Report It

 

The ASSIGN Score

ASSIGN is a cardiovascular risk score developed in Dundee University, Scotland in 2006.

ASSIGN includes social deprivation for the first time, and family history of cardiovascular disease with the classic risk factors.

It identifies people free of cardiovascular disease most likely to develop it over ten years. ‘High risk’ (score 20 or more) implies risk-lowering medication and/or other medical help.

ASSIGN is the cardiovascular risk score chosen for use by SIGN (Scottish Intercollegiate Guidelines Network) and Scottish Government Health Directorates.

Source: assign-score.com
Clinical Resource: Calculator
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Last Checked: 22/04/13 Link Error: Report It

 

LDL Cholesterol Goal Level Calculator

This risk assessment tool uses data from the Framingham Heart Study to estimate the 10-year risk of having a heart attack (myocardial infarction) or death resulting from coronary heart disease (CHD) in adults age 20 or older who do not already have heart disease or diabetes.

Source: mcw.edu
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Seattle Heart Failure Model

The Seattle Heart Failure Model (SHFM) is a calculator of projected survival at baseline and after interventions for patients with heart failure.

Source: washington.edu
Clinical Resource: Calculator
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Last Checked: 05/01/15 Link Error: Report It

 

Model for predicting the risk of ipsilateral ischaemic stroke in patients with recently symptomatic carotid bifurcation stenosis

Source: stroke.ox.ac.uk
Clinical Resource: Tool
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Last Checked: 17/05/13 Link Error: Report It

 

SPARC - Stroke Prevention in Atrial Fibrillation Risk Tool

for estimating risk of stroke and benefits & risks of antithrombotic therapy in patients with chronic atrial fibrillation

Source: sparctool.com
Clinical Resource: Tool
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Last Checked: 22/04/13 Link Error: Report It

 

Stroke Risk Calculator

This tool can predict a patient's stroke risk 90 days after a Transient Ischemic Attack (TIA).

Source: bmc.org
Clinical Resource: Tool
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Last Checked: 22/04/13 Link Error: Report It

 

FRAX®
WHO Fracture Risk Assessment Tool

The FRAX® tool has been developed by WHO to evaluate fracture risk of patients. It is based on individual patient models that integrate the risks associated with clinical risk factors as well as bone mineral density (BMD) at the femoral neck.

The FRAX® models have been developed from studying population-based cohorts from Europe, North America, Asia and Australia. In their most sophisticated form, the FRAX® tool is computer-driven and is available on this site. Several simplified paper versions, based on the number of risk factors are also available, and can be downloaded for office use.

The FRAX® algorithms give the 10-year probability of fracture. The output is a 10-year probability of hip fracture and the 10-year probability of a major osteoporotic fracture (clinical spine, forearm, hip or shoulder fracture).

Source: shef.ac.uk
Clinical Resource: Various
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Last Checked: 17/05/13 Link Error: Report It

 

QFracture

QFracture is used to estimate an individual's risk of developing

  • hip fracture or
  • osteoporotic fracture (hip, spine, wrist or shoulder)

over the next 10 years.

The algorithms can be used to identify people at high risk of these fractures so they can be assessed in more detail to reduce their risk.

Source: qfracture.org
Clinical Resource: Various
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Last Checked: 17/05/13 Link Error: Report It

 

The Osteoporosis Risk Assessment Instrument (ORAI)

Osteoporosis Risk Assessment Instrument (ORAI) was developed and validated in a cohort of Canadian women and had a sensitivity of 94.4% and specificity of 41.4% in that population.

Source: washington.edu
Clinical Resource: Clinical Calculator
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Last Checked: 05/01/15 Link Error: Report It

 

S.C.O.R.E.

SCORE was developed by Lydick et al. to identify post-menopausal women who may have a T score of < -2 and should be screened.

Source: washington.edu
Clinical Resource: Clinical Calculator
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Last Checked: 05/01/15 Link Error: Report It

 

10-Year Fracture Risk Calculator

The FORE 10-Year Fracture Risk Calculator™ (FORE FRC) Version 2.0 published 12/4/2012 estimates 10-year fracture risk for postmenopausal women and men age 45 and older who are not receiving treatment for osteoporosis.

Source: fore.org
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Asthma versus COPD Calculator

Source: adelaide.edu.au
Clinical Resource: Calculator
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Last Checked: 10/12/13 Link Error: Report It

 

SpirXpert

The SpirXpert website aims at promoting understanding respiratory physiology and pathophysiology. The emphasis is on the measurement and interpretation of spirometric test results.

Source: spirxpert.com
Clinical Resource: Various
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Last Checked: 13/03/14 Link Error: Report It

 

Spirometry Reference Value Calculator

Enter Age, Height, Gender and Race. To see Percent Prediced, you must enter observed FVC, FEV1, and FEF25-75% values in the appropriate boxes.

Source: cdc.gov
Clinical Resource: Calculator
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Last Checked: 29/04/13 Link Error: Report It

 

Spirometry Calculator

Source: patient.co.uk
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Canadian Lung Health Test

This COPD test from the Canadian Lung Association website is for information purposes only.

Source: lung.ca
Clinical Resource: Test
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Last Checked: 20/08/15 Link Error: Report It

 

The lung age of smokers. Lung age calculator

Source: bpac.org.nz
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Calculators | American Thyroid Association

Calculators

Calcitonin and Carcinoembryonic Antigen (CEA) Doubling Time Calculator
Change in Thyroid Nodule Volume Calculator
Thyroid Cancer Staging Calculator

Source: thyroid.org
Clinical Resource: Calculators
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Last Checked: 08/05/13 Link Error: Report It

 

HbA1c converter

Convert HbA1c % to mmol/mol and vice versa

Source: diabetes.org.uk
Clinical Resource: Converter
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Last Checked: 13/03/14 Link Error: Report It

 

estimated Average Glucose, eAG

ADA is recommending the use of a new term in diabetes management, estimated average glucose, or eAG. Health care providers can now report A1C results to patients using the same units (mg/dl or mmol/l) that patients see routinely in blood glucose measurements.

Source: professional.diabetes.org
Clinical Resource: Calculator
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Last Checked: 13/03/14 Link Error: Report It

 

HOMA Calculator

The HOMA Calculator uses the HOMA2 model to estimate beta cell function (%B) and insulin sensitivity (%S) for an individual from simultaneously measured fasting plasma glucose and fasting plasma RIA insulin values. Fasting specific insulin or C-peptide values can be used instead of RIA insulin. The HOMA2 model is calibrated to give %B and %S values of 100% in normal young subjects when using a suitable insulin assay.

Source: dtu.ox.ac.uk
Clinical Resource: Calculator
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Last Checked: 08/05/13 Link Error: Report It

 

Conversion of Glucose Values from mg/dl to mmol/l

Source: soc-bdr.org
Clinical Resource: Calculator
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Last Checked: 13/03/14 Link Error: Report It

 

Alcohol Unit & Calorie Calculator

Source: drinkaware.co.uk
Clinical Resource: Calculator
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Last Checked: 12/02/14 Link Error: Report It

 

Geriatric Depression Scale

Source: bpac.org.nz
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Sodium Correction for Glucose Medical Calculator

Source: ebmconsult.com
Clinical Resource: Calculator
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Last Checked: 19/10/15 Link Error: Report It

 

Osmolality Gap Calculator

The osmolality gap (OG) is an indication of unmeasured solute in the blood. It is determined by the measured osmolality (MO) minus the calculated osmolality (CO).

Source: healthcare.uiowa.edu
Clinical Resource: Calculator
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Last Checked: 19/08/15 Link Error: Report It

 

Calcium Correction for Hypoalbuminemia Medical Calculator

Source: pharmacologyweekly.com
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Serum Anion Gap Medical Calculator

Source: pharmacologyweekly.com
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Anion Gap Calculator

Source: oncologynurseadvisor.com
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Arterial blood gas calculator

ABG interpreter. Automatic ABG interpretation.

Source: prognosis.org
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Oxygen carriage in blood

Oxygen is carried in the blood in two ways: bound to haemoglobin, and dissolved in the blood plasma. The total oxygen content of blood is found by simply adding these together.

Source: altitude.org
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Advanced blood oxygen content calculator

This oxygen content calculator allows you to change every one of the input values. If it seems a bit confusing, try the basic oxygen content calculator to get an idea of the concepts involved.

Source: altitude.org
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Hemoglobin saturation graph

By entering values in the green boxes, you can alter the main factors that determine the position of the oxyhaemoglobin saturation curve.

Source: altitude.org
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Oxygen delivery model

The excel-based oxygen delivery model has now been rewritten as a web application. Click this link to acceses the new version, which provides an integrated model of gas exchange and blood gas analysis in respiratory physiology.

Source: altitude.org
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Maintenance Fluid Calculator

Source: ebmconsult.com
Clinical Resource: Calculator
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Last Checked: 19/10/15 Link Error: Report It

 

Absolute Neutrophil Count Calculator

Source: oncologynurseadvisor.com
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Absolute Reticulocyte Count Calculator

Source: oncologynurseadvisor.com
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

eGFR Calculator

from the UK CKD eGuide on the Renal Association website

Source: renal.org
Clinical Resource: Calculator
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Last Checked: 30/12/13 Link Error: Report It

 

eGFR Calculator

  • MDRD
  • Cockcroft-Gault
Source: sheffield-kidney-institute.org
Clinical Resource: Calculators
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Last Checked: 16/03/13 Link Error: Report It

 

GFR Calculator (CKD-EPI FORMULA)

The new CKD-EPI formula provides a more precise calculation for the measurement of eGFR, the measurement of kidney function. eGFR is now calculated using the CKD-EPI formula as it improves risk stratification.

Source: kidney.org.au
Clinical Resource: Calculator
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Last Checked: 21/08/15 Link Error: Report It

 

Model for End-Stage Liver Disease (MELD)

The Model for End-Stage Liver Disease (MELD) is a reliable measure of mortality risk in patients with end-stage liver disease. It is used as a disease severity index to help prioritize allocation of organs for transplant.

Source: mayoclinic.org
Clinical Resource: Calculators
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Last Checked: 17/05/13 Link Error: Report It

 

Clinical Calculators

This page contains a set of clinical calculators

Clinical Calculators

  • Rockall score
  • Childs/Pugh score
  • Maddrey's Coefficient
Source: bsg.org.uk
Clinical Resource: Calculators
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Last Checked: 17/05/13 Link Error: Report It

 

Scoring Systems for ICU & Surgical Patients - Société Française d’Anesthésie et de Réanimation

These pages allow an easy calculation of scores used in general or specialized Intensive Care or Anesthesia.

Source: sfar.org
Clinical Resource: Calculators
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Last Checked: 19/10/15 Link Error: Report It

 

Gentamicin Dose Calculator for Adult Patients

Source: scottishmedicines.org
Clinical Resource: Calculator
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Last Checked: 20/08/14 Link Error: Report It

 

Once Daily Gentamicin in Adults Dose Calculator

Source: nuh.nhs.uk
Clinical Resource: Calculator
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Last Checked: 17/02/14 Link Error: Report It

 

Intravenous Vancomycin Dose Calculator for Adult Patients

Source: scottishmedicines.org
Clinical Resource: Calculator
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Last Checked: 20/08/15 Link Error: Report It

 

Ideal Body Weight Calculator with IVIg Dosing

The Dose Calculator is intended to be used when determining the dose of IVIG for clinically obese patients; it is not recommended for paediatric patients nor any patients (incl. adults) under 5ft in height.

Source: transfusionontario.org
Clinical Resource: Calculator
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Last Checked: 10/12/13 Link Error: Report It

 

t-PA Dosing Calculator

Use this calculator to determine tPA dosing information.

Source: massgeneral.org
Clinical Resource: Dosing Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

WarfarinDosing.org

Welcome to WarfarinDosing.org, a free Web site to help doctors and other clinicians begin warfarin therapy by estimating the therapeutic dose in patients new to warfarin. This site is supported by the Barnes-Jewish Hospital at Washington University Medical Center, the NIH, and donations. Estimates are based on clinical factors and (when available) genotypes of two genes: cytochrome P450 2C9 (CYP2C9) and vitamin K epoxide reductase (VKORC1).

Recommendations on this Web site are based on data from over 1000 patients.Once information is entered onto the next page, the initial estimate of therapeutic dose explains 53% of the variability in a warfarin dose. If you return to the Web site and enter an INR value after 3 and/or 4 warfarin doses, the dose refinement is even more accurate.

Source: warfarindosing.org
Clinical Resource: Calculator
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Last Checked: 17/02/14 Link Error: Report It

 

Corticosteroid Equivalent Dose Calculator

sterconv.html is a Javascript application which converts milligrams of various corticosteroids to the equivalent dose of Methylprednisolone. The conversion data is adapted from Goodman and Gilman's The Pharmacological Basis of Therapeutics, 9th ed.

Source: hedwig.mgh.harvard.edu
Clinical Resource: Calculator
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Last Checked: 28/11/16 Link Error: Report It

 

Half Life

Calculate the half-life of a drug from two plasma levels separated by a time interval.

Source: weill.cornell.edu
Clinical Resource: Calculator
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Last Checked: 17/02/14 Link Error: Report It

 

Breast Cancer Risk Assessment Tool

The Breast Cancer Risk Assessment Tool is an interactive tool designed by scientists at the National Cancer Institute (NCI) and the National Surgical Adjuvant Breast and Bowel Project (NSABP) to estimate a woman's risk of developing invasive breast cancer.

Source: cancer.gov
Clinical Resource: Tool
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Last Checked: 10/12/13 Link Error: Report It

 

WHO vaccine-preventable diseases: monitoring system. 2012 global summary

Source: who.int
Clinical Resource: Database
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Last Checked: 17/05/13 Link Error: Report It

 

'MUST' Calculator

Use the calculator to establish nutritional risk using 'MUST'.

Source: bapen.org.uk
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Statistics Calculator

Diagnostic Test - calculates the Sensitivity, Specificity, PPV, NPV, LR+, and LR-
Prospective Study - calculates the Relative Risk (RR), Absolute Relative Risk (ARR), and Number Needed to Treat (NNT)
Case-control Study - calculates the Odds Ratio (OR)
Randomized Control Trial (RCT) - calculates the Relative Risk Reduction (RRR), ARR, and NNT

Source: ktclearinghouse.ca
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

Odds Ratio to NNT Converter

Conversion from OR to NNTs

Source: ktclearinghouse.ca
Clinical Resource: Calculator
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Last Checked: 17/05/13 Link Error: Report It

 

CATMaker and EBM Calculators

On this page you can download CATmaker, the CEBM’s venerable computer-assisted critical appraisal software, and use our interactive EBM calculators.

CATmaker
All-purpose 2×2 table EBM calculator
Diagnostic calculator and visualiser
Interactive nomogram

Source: cebm.net
Clinical Resource: Calculators
Register to Access Content: No

Last Checked: 17/06/14 Link Error: Report It

 

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