Clinical & Lab Calculators

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.

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.

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.

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.

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.

Score one-year major bleeding risk in atrial fibrillation with HAS-BLED. The age point is derived automatically, with derivation-cohort bleeding rates and the modifiable risk factors to address.

Calculate LDL cholesterol from total cholesterol, HDL and triglycerides with the Sampson/NIH 2020 equation, compared with Friedewald. Enter mg/dL or mmol/L and see non-HDL cholesterol.

Estimate creatinine clearance with the Cockcroft-Gault equation using actual, ideal and adjusted body weight side by side. Enter mg/dL or µmol/L and see the FDA renal function class.

Calculate body surface area in m² from height and weight with the Mosteller formula, compared against DuBois, Haycock and Gehan–George. Enter pounds and feet or kilograms and centimetres.

Correct the QT interval for heart rate with Fridericia, Bazett, Framingham and Hodges side by side, with sex-specific normal, prolonged and short QTc ranges.