Calculators
Evigrade clinical calculators. Every formula is covered by unit tests with reference cases from published sources.
CHA₂DS₂-VASc (Stroke Risk in Atrial Fibrillation)
Thromboembolic risk score in atrial fibrillation for anticoagulation decisions.
HAS-BLED (Bleeding Risk on Anticoagulation)
Bleeding risk in patients on anticoagulation. Used alongside CHA₂DS₂-VASc.
HOMA-IR (Insulin Resistance Index)
Insulin resistance index from fasting insulin and glucose. Metabolic syndrome marker.
Body Mass Index (BMI)
Body mass index from height and weight with WHO classification.
Creatinine Clearance (Cockcroft-Gault)
Creatinine clearance for drug dose adjustment. Not equivalent to eGFR.
Resting Metabolic Rate (Mifflin-St Jeor) + TDEE
Resting metabolic rate and total daily energy expenditure by activity level. Most accurate formula for adults per ADA Evidence Analysis.
Body Surface Area (BSA) — Du Bois & Mosteller
Body surface area for chemotherapy dosing, GFR normalization, and cardiac index calculation.
Total Iron Deficit (Ganzoni Formula)
Total parenteral iron dose for iron deficiency anemia correction.
eGFR — CKD-EPI 2021 (race-free)
Estimates glomerular filtration rate using the CKD-EPI 2021 creatinine equation. This is the race-free version recommended in the United States and compatible with KDIGO 2024.