Medical Calculators
Free medical calculators including BMI, pregnancy due date, ovulation, FINDRISC, CHA2DS2-VASc, Wells DVT, and pediatric drug dosing. 16 validated tools.
Articles
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Apgar Score Calculator (Newborn Assessment)
Apgar score for newborn assessment at 1 and 5 minutes. Appearance, Pulse, Grimace, Activity, Respiration. From Apgar 1953.
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BMI Calculator: Body Mass Index with WHO Classification
Free BMI calculator using WHO categories. Enter height and weight in metric or imperial units to get instant interpretation. Evidence-based screening tool.
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Body Surface Area (BSA) Calculator: Mosteller
Mosteller BSA calculator for chemotherapy dosing, IV fluids, and pediatric medications. From Mosteller, NEJM 1987. Reviewed by iMedic's medical editorial team.
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CHA2DS2-VASc Score: Stroke Risk in Atrial Fibrillation
Free CHA2DS2-VASc calculator for stroke risk in non-valvular atrial fibrillation. Validated score from Lip et al., Chest 2010, used in major cardiology
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CURB-65 Score: Pneumonia Severity
CURB-65 score for community-acquired pneumonia severity and admission decisions. From Lim et al., Thorax 2003. Reviewed by iMedic's medical editorial team.
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FINDRISC: Type 2 Diabetes Risk Calculator
Free validated FINDRISC calculator estimates your 10-year risk of type 2 diabetes. Based on Lindström & Tuomilehto research published in Diabetes Care (2003).
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Glasgow Coma Scale (GCS) Calculator
GCS scoring for level of consciousness. Eye, verbal, motor breakdown. From Teasdale & Jennett, Lancet 1974. Reviewed by iMedic's medical editorial team.
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HAS-BLED Score: Bleeding Risk on Anticoagulation
HAS-BLED calculator estimates major bleeding risk in atrial fibrillation patients on anticoagulation. From Pisters et al., Chest 2010.
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HEART Score: Chest Pain Risk in ED
HEART score for 6-week MACE risk in ED chest pain. Validated by Six et al., Neth Heart J 2008. Decide admission vs discharge.
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MELD Score Calculator: Liver Disease Mortality
MELD score estimates 90-day mortality in chronic liver disease. Used for liver transplant prioritization. From Kamath et al., Hepatology 2001.
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Ovulation Calculator: Fertile Window Tracker
Free ovulation calculator. Enter your last period date and cycle length to identify your fertile window and most likely ovulation day. Evidence-based timing.
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Pediatric Ibuprofen Dose Calculator
Weight-based ibuprofen dose calculator for children over 3 months. Calculates mL of suspension based on weight and product concentration.
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Pediatric Paracetamol Dose Calculator (Acetaminophen)
Weight-based paracetamol dose calculator for children. Calculates mL of suspension based on child's weight and product concentration. BNF for Children dosing.
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Pregnancy Due Date Calculator: Naegele's Rule
Free pregnancy due date calculator using Naegele's rule. Enter your last menstrual period to estimate your due date and conception date.
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qSOFA Score: Sepsis Screening
qSOFA bedside screen for sepsis organ dysfunction. From Sepsis-3 consensus, Singer et al., JAMA 2016. Reviewed by iMedic's medical editorial team.
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Wells DVT Score: Deep Vein Thrombosis Probability
Free Wells score calculator for DVT clinical pretest probability. Validated in NEJM 2003 (Wells et al.). Used with D-dimer and ultrasound in diagnostic workup.