Medical Calculators & Clinical Scores
Evidence-based calculators for screening, risk stratification, and clinical documentation — no install required.
Step-by-step medical calculator guides →
Medical & clinical · Free tier available · Trust center
Tools in this category
BMI Calculator
Body mass index from height and weight.
HEART Score
Chest pain risk stratification score.
eGFR Calculator
Kidney function estimate from creatinine.
CHA₂DS₂-VASc Score
Stroke risk in atrial fibrillation.
Wells Score (DVT/PE)
DVT and PE pre-test probability.
GCS Calculator
Free online tool — no install.
MAP Calculator
Free online tool — no install.
HAS-BLED Score
Free online tool — no install.
Parkland Formula
Free online tool — no install.
NIHSS Calculator
Free online tool — no install.
Common use cases
- Estimate BMI for patient intake forms
- Calculate eGFR from creatinine for CKD staging
- Score chest pain with HEART before disposition
- Assess stroke risk with CHA₂DS₂-VASc for anticoagulation discussions
- Evaluate DVT/PE pre-test probability with Wells criteria
FAQ
Are these medical calculators for diagnosis?
No — they are educational aids. Always apply clinical judgment and local protocols; they do not replace licensed medical advice.
Do you store patient data?
Calculators run in your browser session. RatPDF does not require patient identifiers for these tools.
Can I use these on mobile?
Yes — all calculators are responsive and work on phones and tablets.
Ready to try it?
3 free uses per day · 200 MB · no signup · files deleted after download
Open free tool Pro — $8.99/mo Trust center