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Clinical calculators for
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Free medical calculators, scoring tools and drug dosing guides. Instant results for clinicians, nurses and students.

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⚠️ For educational and reference purposes only. Always verify clinical decisions with current guidelines and senior clinical staff.
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⚖️ Nutrition & Weight 9
⚖️ Nutrition & Weight
BMI Calc (Adult)
Calculate Body Mass Index for adults. Assess healthy weight range and obesity categor...
⚖️ Nutrition & Weight
BMI Calc for Children
Calculate BMI for children aged 2-18. Uses age and sex-specific percentiles from CDC ...
⚖️ Nutrition & Weight
Body Fat % Calc (Navy Method)
Calculate body fat percentage using the US Navy circumference method for men and wome...
⚖️ Nutrition & Weight
Ideal and Adjusted Body Weight Calc
Calculate IBW, adjusted body weight and lean body weight for clinical dosing.
⚖️ Nutrition & Weight
Body Surface Area (BSA)
Calculate BSA using Mosteller and DuBois formulas. Essential for chemotherapy drug do...
⚖️ Nutrition & Weight
Daily Calorie Needs (TDEE)
Calculate daily calorie needs using Mifflin-St Jeor equation. Find your TDEE for weig...
⚖️ Nutrition & Weight
Ideal Body Weight Calc
Calculate ideal body weight using Devine, Robinson and Miller formulas. Used for drug...
⚖️ Nutrition & Weight
Pregnancy Weight Gain Calc
Calculate recommended weight gain during pregnancy based on pre-pregnancy BMI and gui...
⚖️ Nutrition & Weight
Waist-Hip Ratio Calc
Calculate waist-to-hip ratio and assess cardiovascular and metabolic risk from abdomi...
❤️ Cardiology 16
❤️ Cardiology
APTT-Based Heparin Adjustment
Adjust UFH infusion based on APTT result using standard nomogram.
❤️ Cardiology
Blood Pressure Classifier
Classify your blood pressure reading using AHA/ACC guidelines. Calculate MAP and puls...
❤️ Cardiology
Blood Pressure Interpreter
Interpret blood pressure readings using AHA/ESC guidelines. Classify hypertension sta...
❤️ Cardiology
CHA₂DS₂-VASc Score
Stroke risk in atrial fibrillation. Guides anticoagulation decisions.
❤️ Cardiology
Corrected QT (QTc) Calc
Calculate corrected QT interval using Bazett and Fridericia formulas. Screen for QT p...
❤️ Cardiology
Framingham Risk Score
Calculate 10-year cardiovascular disease risk based on age, cholesterol, blood pressu...
❤️ Cardiology
GRACE Score (ACS)
Risk stratification in acute coronary syndrome. Predicts in-hospital and 6-month mort...
❤️ Cardiology
HAS-BLED Score
Bleeding risk assessment in anticoagulated patients with atrial fibrillation.
❤️ Cardiology
Heart Rate Zone Calc
Calculate your maximum heart rate and 5 training zones for safe and effective cardiov...
❤️ Cardiology
Heart Rate Zones Calc
Calculate target heart rate zones for exercise training based on maximum heart rate.
❤️ Cardiology
Unfractionated Heparin Infusion Calc
Calculate UFH loading dose and initial infusion rate using weight-based protocol.
❤️ Cardiology
Mean Arterial Pressure (MAP)
Calculate mean arterial pressure from systolic and diastolic blood pressure readings.
❤️ Cardiology
Nitroglycerin Infusion Rate Calc
Calculate nitroglycerin infusion rates for ACS and hypertensive emergency.
❤️ Cardiology
Target Heart Rate Calc
Calculate target heart rate for moderate and vigorous aerobic exercise intensity.
❤️ Cardiology
TIMI Risk Score (NSTEMI)
Risk stratification for unstable angina / NSTEMI. Predicts 14-day adverse cardiac eve...
❤️ Cardiology
Warfarin INR Management Guide
Guide INR management and warfarin dose adjustment based on current INR.
🫀 Renal & Electrolytes 17
🫀 Renal & Electrolytes
Renal Dose Adjustment Guide
Quick reference for common drug dose adjustments in chronic kidney disease stages.
🫀 Renal & Electrolytes
Anion Gap Calc
Calculate anion gap and delta-delta ratio for metabolic acidosis workup from electrol...
🫀 Renal & Electrolytes
Corrected Calcium Calc
Calculate corrected serum calcium for hypoalbuminaemia. Essential for accurate hypoca...
🫀 Renal & Electrolytes
Creatinine Clearance (Cockcroft-Gault)
Calculate creatinine clearance using Cockcroft-Gault equation. Used for renal drug do...
🫀 Renal & Electrolytes
Fluid Balance Calc
Calculate daily fluid balance from input and output measurements for clinical monitor...
🫀 Renal & Electrolytes
eGFR Calc (CKD-EPI)
Estimate glomerular filtration rate and stage chronic kidney disease using the CKD-EP...
🫀 Renal & Electrolytes
eGFR Calc (CKD-EPI)
Estimate GFR using CKD-EPI equation for chronic kidney disease staging and monitoring...
🫀 Renal & Electrolytes
Iron Deficiency
Interpret ferritin and serum iron levels to assess iron deficiency and guide suppleme...
🫀 Renal & Electrolytes
IV Fluid Rate Calc
Calculate IV fluid infusion rate in mL/hr from total volume and duration. Includes dr...
🫀 Renal & Electrolytes
Maintenance Fluid Calc (Holliday-Segar)
Calculate daily maintenance fluid requirements using the Holliday-Segar method for pa...
🫀 Renal & Electrolytes
Oral Rehydration Calc
Calculate oral rehydration solution needs for dehydration in children and adults.
🫀 Renal & Electrolytes
Potassium Replacement Calc
Calculate IV and oral potassium replacement for hypokalaemia.
🫀 Renal & Electrolytes
Renal Function & CrCl Estimator
Calculate creatinine clearance using Cockcroft-Gault and CKD staging.
🫀 Renal & Electrolytes
Serum Osmolality Calc
Calculate measured and estimated serum osmolality. Detect osmolar gap in poisoning wo...
🫀 Renal & Electrolytes
Sodium Correction Rate Calc
Calculate safe sodium correction rate for hyponatraemia to prevent osmotic demyelinat...
🫀 Renal & Electrolytes
Sodium Deficit Calc
Calculate sodium deficit in hyponatraemia to guide replacement therapy.
🫀 Renal & Electrolytes
Urine Protein:Creatinine Ratio
Calculate urine protein-to-creatinine ratio (PCR) to estimate 24-hour proteinuria.
💊 Medications & Dosing 17
💊 Medications & Dosing
Blood Glucose Sliding Scale
Calculate insulin sliding scale doses based on blood glucose reading.
💊 Medications & Dosing
Drug Dosage Calc
Calculate weight-based drug doses for adults and children. Supports mg/kg, mcg/kg dos...
💊 Medications & Dosing
Weight-Based Drug Dose Calc
Calculate weight-based drug doses for common medications. Enter dose per kg and weigh...
💊 Medications & Dosing
Gentamicin Extended Interval Dosing
Calculate gentamicin extended interval dosing (Hartford protocol).
💊 Medications & Dosing
HbA1c & Average Blood Glucose
Convert HbA1c to estimated average glucose or vice versa. Essential for diabetes mana...
💊 Medications & Dosing
Insulin Correction Dose Calc
Calculate insulin correction dose based on current blood glucose and correction facto...
💊 Medications & Dosing
Magnesium Sulphate Dose Calc
Calculate MgSO4 doses for hypomagnesaemia, eclampsia and torsades.
💊 Medications & Dosing
Opioid Dose Equivalence Calc
Convert between opioid analgesics using morphine milligram equivalents (MME). For pai...
💊 Medications & Dosing
Opioid Infusion Rate Calc
Calculate morphine equivalent infusion rates and opioid conversions.
💊 Medications & Dosing
Oxygen Delivery Calc
Calculate oxygen delivery (DO2) and consumption (VO2) for critically ill patients.
💊 Medications & Dosing
Paediatric Dose Calc
Weight-based paediatric drug dosing for common medications including paracetamol, ibu...
💊 Medications & Dosing
Phenytoin / Fosphenytoin Dose Calc
Calculate phenytoin loading and maintenance doses with albumin correction.
💊 Medications & Dosing
Steroid Dose Equivalency Calc
Convert between corticosteroid doses using equivalency ratios.
💊 Medications & Dosing
Corticosteroid Dose Equivalence
Convert between corticosteroids using anti-inflammatory dose equivalence chart.
💊 Medications & Dosing
Red Cell Transfusion Calc
Calculate units of packed red cells needed to achieve target haemoglobin in adults.
💊 Medications & Dosing
Vancomycin Dose Calc (AUC-based)
Calculate vancomycin dosing using AUC/MIC targeting methodology.
💊 Medications & Dosing
Vitamin D Dose Calc
Estimate vitamin D supplementation needs based on current level and target. Includes ...
🧠 Neurology & Scoring 16
🧠 Neurology & Scoring
Braden Scale
Assess pressure injury risk using the Braden Scale for adults in any clinical setting...
🧠 Neurology & Scoring
CURB-65 Pneumonia Score
Assess pneumonia severity and guide hospital admission decisions using the CURB-65 sc...
🧠 Neurology & Scoring
ECOG Performance Status
Assess functional status of cancer patients using the ECOG scale. Guides treatment el...
🧠 Neurology & Scoring
Glasgow Coma Scale (GCS)
Calculate GCS score from eye, verbal and motor responses. Standard tool for level of ...
🧠 Neurology & Scoring
Glasgow-Blatchford Score
Risk stratification in upper GI bleeding. Guides admission and endoscopy decisions.
🧠 Neurology & Scoring
Glasgow Coma Scale (GCS)
Calculate GCS score for assessment of consciousness level in neurological and trauma ...
🧠 Neurology & Scoring
Karnofsky Performance Score
Assess functional status using the Karnofsky scale (0-100). Used in oncology and pall...
🧠 Neurology & Scoring
Morse Fall Scale
Assess fall risk in hospitalised patients using the Morse Fall Scale. Guide preventio...
🧠 Neurology & Scoring
NIH Stroke Scale (NIHSS)
Quantify stroke severity using the NIH Stroke Scale. Guides treatment decisions and o...
🧠 Neurology & Scoring
Padua Score (VTE Risk)
Venous thromboembolism risk in hospitalised medical patients. Guides prophylaxis deci...
🧠 Neurology & Scoring
qSOFA Score (Sepsis)
Quick SOFA score for identifying patients at risk of sepsis and poor outcomes outside...
🧠 Neurology & Scoring
SOFA Score (Sepsis)
Sequential Organ Failure Assessment score for ICU sepsis severity and prognosis.
🧠 Neurology & Scoring
Waterlow Pressure Ulcer Risk
Assess pressure ulcer/injury risk using the Waterlow scale for hospitalised patients.
🧠 Neurology & Scoring
Wells DVT Score
Pre-test probability for deep vein thrombosis. Guides decision for ultrasound and ant...
🧠 Neurology & Scoring
Ottawa Ankle Rules
Clinical decision rule to determine need for X-ray after ankle and midfoot injuries.
🧠 Neurology & Scoring
Wells PE Score
Pre-test probability for pulmonary embolism. Guides CT-PA and D-dimer decisions.
🧬 Mental Health & Screening 7
🧬 Mental Health & Screening
Alcohol Units Calc
Calculate the number of alcohol units in any drink. Includes weekly guidelines and li...
🧬 Mental Health & Screening
AUDIT Alcohol Screening
Alcohol Use Disorders Identification Test. Screens for hazardous and harmful alcohol ...
🧬 Mental Health & Screening
CAGE Alcohol Questionnaire
Brief 4-question CAGE screen for alcohol dependence and problem drinking.
🧬 Mental Health & Screening
Type 2 Diabetes Risk Calc
Estimate your risk of developing type 2 diabetes in the next 5-10 years using the AUS...
🧬 Mental Health & Screening
GAD-7 Anxiety Screening
Generalised Anxiety Disorder 7-item scale. Screens for and measures anxiety severity.
🧬 Mental Health & Screening
PHQ-9 Depression Screening
Patient Health Questionnaire-9 for depression screening and severity assessment.
🧬 Mental Health & Screening
Pack-Years Calc
Calculate cumulative smoking exposure in pack-years. Used for lung cancer screening e...
🤰 Obstetrics & Paediatrics 8
🤰 Obstetrics & Paediatrics
APGAR Score Calc
Calculate APGAR score for newborn assessment at 1 and 5 minutes. Evaluate newborn hea...
🤰 Obstetrics & Paediatrics
Bishop Score
Assess cervical ripeness for induction of labour. Guides induction decisions.
🤰 Obstetrics & Paediatrics
Developmental Milestones Checker
Check key developmental milestones for children from birth to 5 years by age group.
🤰 Obstetrics & Paediatrics
Due Date (EDD) Calc
Calculate estimated due date from last menstrual period. Track pregnancy weeks and tr...
🤰 Obstetrics & Paediatrics
Estimated Due Date Calc
Calculate your estimated due date (EDD) from last menstrual period or conception date...
🤰 Obstetrics & Paediatrics
Gestational Age Calc
Calculate gestational age in weeks and days from LMP. Identify trimester and key mile...
🤰 Obstetrics & Paediatrics
Parkland Formula (Burns)
Calculate IV fluid resuscitation volume for burn patients using the Parkland formula.
🤰 Obstetrics & Paediatrics
Paediatric Weight-for-Age
Assess child's weight against WHO growth standards. Identify underweight, normal and ...
🏥 Gastro & Other 10
🏥 Gastro & Other
Estimated Blood Volume (EBV)
Calculate estimated blood volume based on weight, sex and age. Used in anaesthesia an...
🏥 Gastro & Other
Child-Pugh Score
Assess severity of liver cirrhosis and predict surgical risk and prognosis.
🏥 Gastro & Other
FRAX Fracture Risk (Simplified)
Estimate 10-year osteoporotic fracture risk. Guides bone density testing and treatmen...
🏥 Gastro & Other
IPSS Prostate Symptom Score
International Prostate Symptom Score for BPH severity. Guides treatment decisions in ...
🏥 Gastro & Other
MELD Score
Model for End-Stage Liver Disease. Used for liver transplant prioritisation and progn...
🏥 Gastro & Other
Peak Flow Calc (% Predicted)
Calculate percentage of predicted peak flow for asthma assessment and management.
🏥 Gastro & Other
Rule of Nines
Calculate total body surface area (TBSA) affected by burns using the Rule of Nines.
🏥 Gastro & Other
Tonsil Grading Scale
Grade tonsil size using the 0-4 Brodsky scale. Guides surgical decision-making in ton...
🏥 Gastro & Other
Thyroid Function Interpreter
Interpret TSH and Free T4 results to guide thyroid diagnosis and management.
🏥 Gastro & Other
Visual Acuity Converter
Convert visual acuity between Snellen, decimal and LogMAR formats used in ophthalmolo...
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