Evidence-Based · WHO-Approved · Free Forever
Medical Calculators
Built for Precision.
45 free clinical tools for doctors, nurses, pharmacists, and patients. Instant results, visual outputs, PDF export — no sign-up, no installation, no compromise on accuracy.
No registration required
HIPAA-friendly (no data stored)
Works offline
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Browse by Specialty
8 Clinical Categories
Every tool is organized by clinical specialty so you find exactly what you need in seconds.
Calculators
BMI, BMR, BSA, ideal weight, caloric needs, waist-hip ratio, and body composition tools.
Converters
Unit conversion, medication dose, lab values, temperature, and weight converters.
Clinical Scores
GCS, APACHE II, Wells DVT/PE, CHA₂DS₂-VASc, TIMI, QTc and validated scoring systems.
Pediatrics
Pediatric drug dosing, growth percentile charts, vaccine schedules, and APGAR scoring.
Cardiology
Framingham risk score, QTc interval, TIMI risk, and cardiovascular risk assessment tools.
Pharmacy
Creatinine clearance, IV drip rate, weight-based dosing, and renal dosing adjustment tools.
Women's Health
Due date calculator, ovulation tracker, menstrual cycle, APGAR score, and fertility tools.
Mental Health
PHQ-9 depression screen, GAD-7 anxiety, burnout index, sleep quality score, and stress assessment.
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Most Used
Featured Tools
The calculators clinicians and patients reach for most — all instant, all free.
🔥 Popular
BMI Calculator
Instant Body Mass Index with WHO classification, visual gauge, ideal weight range, and PDF export.
🔥 Popular
BMR / TDEE Calculator
Basal metabolic rate and total daily energy expenditure using Mifflin-St Jeor and Harris-Benedict formulas.
🔥 Popular
Glasgow Coma Scale (GCS)
Rapid neurological assessment with severity classification, prognosis guidance, and printable report.
🔥 Popular
Creatinine Clearance (CrCl)
Cockcroft-Gault and CKD-EPI equations for renal function assessment and drug dose adjustment.
🔥 Popular
Wells Score (DVT / PE)
Pre-test probability for deep vein thrombosis and pulmonary embolism with clinical decision support.
✨ New
PHQ-9 Depression Screen
Validated 9-item Patient Health Questionnaire with severity classification and clinical guidance.
✨ New
Pregnancy Due Date
Calculate estimated due date (EDD) from LMP, conception date, or ultrasound with trimester timeline.
🔥 Popular
IV Drip Rate Calculator
Calculate IV flow rate in drops/min or mL/hr from volume, time, and drop factor with safety checks.
✨ New
Framingham Risk Score
10-year cardiovascular disease risk estimation for primary prevention based on Framingham Heart Study.
Why MediCalc Pro
Built Different.
Better in Every Way.
We studied WebMD, Healthline, MDCalc, and Omnicalculator — then built what they couldn't.
Instant, Silent Execution
Results appear the moment you click — no page reload, no loading screen. Every calculation runs in under 50ms directly in your browser.
Evidence-Based Accuracy
Every formula is sourced from peer-reviewed literature, WHO guidelines, and validated clinical studies. No guesswork, no rounding errors.
Works on Every Device
Mobile-first responsive design. Works on phones, tablets, and desktops equally well — even without internet after first load (PWA).
PDF, CSV & Print Export
Every tool generates a professional, branded report exportable as PDF or CSV — perfect for clinical documentation and patient handouts.
50+ Languages
Full UI language switching for 50+ languages including Arabic, Urdu, Chinese, Spanish, French, and more — with RTL support.
Visual Outputs & Charts
Not just numbers — every result comes with charts, gauges, and visual indicators that make results easy to understand and communicate.
Feature Comparison
MediCalc Pro vs. Competitors
See how we stack up against WebMD Tools, Healthline, MDCalc, and Omnicalculator.
| Feature | MediCalc Pro ✦ | MDCalc | WebMD | Healthline | Omnicalculator |
|---|---|---|---|---|---|
| Instant in-browser results | ✓ | ✓ | ✓ | ✓ | ✓ |
| Dark mode | ✓ | ✗ | ✗ | ✗ | Partial |
| PDF / CSV Export | ✓ | ✗ | ✗ | ✗ | PDF only |
| 50+ language support | ✓ | ✗ | Limited | ✗ | Limited |
| Visual charts & gauges | ✓ | Some | ✗ | ✗ | ✓ |
| WCAG 2.1 Accessibility | ✓ | Partial | Partial | Partial | Partial |
| Works offline (PWA) | ✓ | ✗ | ✗ | ✗ | ✗ |
| No registration required | ✓ | ✗ | ✓ | ✓ | ✓ |
| Metric + Imperial toggle | ✓ | Some | Some | Some | ✓ |
| Clinical score validation sources | ✓ | ✓ | ✗ | ✗ | Some |
| No personal data stored | ✓ | ✗ | ✗ | ✗ | ✓ |
| Branded report generation | ✓ | ✗ | ✗ | ✗ | ✗ |
Trusted By
What Clinicians Are Saying
★★★★★
"Finally a medical calculator site that doesn't feel like it was built in 2005. The dark mode and PDF export are game changers in the ER at 3am."
★★★★★
"The GCS and Wells Score tools are more intuitive than MDCalc. I use them on my phone between patient rounds — instant, no login."
★★★★★
"The creatinine clearance calculator with Cockcroft-Gault and CKD-EPI side by side is something no other free tool offers. Excellent for clinical pharmacy."
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