Clinical & Lab Calculators
Bedside and laboratory calculations for clinicians and for patients making sense of their own results — kidney function, long-term glucose control, blood pressure, and stroke risk.
eGFR Calculator
Estimate glomerular filtration rate from serum creatinine, age and sex using the race-free CKD-EPI 2021 equation. Enter mg/dL or µmol/L and see the KDIGO stage.
A1c Calculator
Convert HbA1c to estimated average glucose, or average glucose back to A1c, using the ADAG equation. Results in %, mg/dL, mmol/L and IFCC mmol/mol.
MAP Calculator
Calculate mean arterial pressure and pulse pressure from a systolic and diastolic reading, with the ACC/AHA 2017 blood pressure category and the 65 mmHg perfusion target.
Corrected Calcium Calculator
Adjust total serum calcium for albumin using the Payne formula, in mg/dL or SI units. See the corrected value in both scales, plus why ionised calcium is the reference standard.
CHA₂DS₂-VASc Calculator
Score stroke risk in non-valvular atrial fibrillation. Age and sex points are derived automatically, with the adjusted annual stroke rate and the guideline anticoagulation threshold.