Medical

Medical Calculators Hub — Free Clinical Scores Online

BMI, eGFR, HEART, CHA₂DS₂-VASc, Wells, GCS, MAP, and more — browser-based calculators for education and documentation.

Published June 1, 2025 · 1 min read

Written by Ethan Brooks · Editor-in-Chief & Product Lead

Reviewed by James Cole

Last reviewed January 15, 2026 · Editorial policy

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Free clinical calculators in the browser

RatPDF offers evidence-based medical calculators for education and clinical documentation support: BMI, eGFR, HEART, CHA₂DS₂-VASc, Wells, GCS, MAP, HAS-BLED, Parkland formula, and NIHSS.

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See programmatic guides like BMI calculator for women and eGFR for elderly patients. Editorial hub: medical calculator guides.

Disclaimer: These calculators are educational aids only. They do not diagnose, treat, or replace licensed medical advice. Always follow local clinical protocols.

Sources & references

Primary references used when researching and fact-checking this guide. See our editorial methodology.

Adobe PDF Reference — encryption — Adobe
PDF password protection and encryption standards (ISO 32000).
Ghostscript documentation — PDF settings — Artifex Software
Compression level behavior and PDF output settings.