About MDTools
MDTools is a free collection of evidence-based clinical calculators built for healthcare professionals. Our mission is simple: provide fast, accurate, and accessible medical calculation tools that clinicians can rely on at the bedside.
Why MDTools Exists
Clinical calculators are essential tools for modern medicine — from estimating kidney function with eGFR to stratifying stroke risk with CHA₂DS₂-VASc. But too many calculator websites are cluttered with ads, require sign-ups, or load slowly on hospital Wi-Fi.
MDTools was built to solve these problems. Every calculator is a static HTML page that loads instantly, works on any device, and never asks for your email or credit card. There are no ads, no paywalls, and no data collection.
How We Build Our Tools
Every MDTools calculator is built with care:
- Evidence-based equations: We use published, peer-reviewed formulas — like the 2021 CKD-EPI equation for eGFR and Sepsis-3 criteria for SOFA scoring.
- Clinical interpretation: Raw numbers aren't enough. Each tool provides color-coded interpretation with staging, risk categories, and clinical context.
- Source references: Every calculator cites its source studies and guidelines so you can verify the evidence yourself.
- Mobile-first design: Large touch-friendly inputs, clear results, and responsive layouts designed for phones at the bedside.
Privacy & Data
MDTools takes privacy seriously. Here's what we don't do:
- We don't collect patient data — all calculations happen in your browser
- We don't require accounts or sign-ups
- We don't use analytics trackers or advertising
- We don't have a backend server or database
MDTools is a collection of static HTML, CSS, and JavaScript files. When you enter values into a calculator, the computation happens entirely on your device. No data ever leaves your browser.
Who Is This For?
MDTools is designed for:
- Physicians — attendings, residents, and fellows across specialties
- Nurses and nurse practitioners — quick bedside reference
- Pharmacists — renal dosing calculations and drug conversion tools
- Medical students — learning clinical decision tools with references
- Any healthcare professional who needs fast, reliable clinical calculations
Available Calculators
MDTools currently offers 20+ clinical calculators spanning multiple specialties:
- Nephrology: eGFR (CKD-EPI 2021), Creatinine Clearance
- Cardiology: CHA₂DS₂-VASc, HAS-BLED, HEART Score, Framingham Risk
- Pulmonology: Wells PE, Wells DVT
- Emergency/ICU: SOFA, qSOFA
- Electrolytes/Acid-Base: Anion Gap, Corrected Calcium, ABG Interpreter
- Hepatology: MELD/MELD-Na
- General: BMI, MAP
- Other: Opioid MME Converter, Parkland Formula, APGAR Score, CURB-65
Disclaimer
MDTools is intended for educational purposes only. These calculators are not a substitute for clinical judgment, and results should always be verified against your institution's guidelines and laboratory reference ranges. Clinical decisions should be made by qualified healthcare professionals in the context of each patient's individual situation.