Clinical calculators
Everyday bedside maths in one clean place. Free, no signup, and a taste of the structured, error-resistant tools OlivHealth builds into daily hospital work.
Body mass index from height and weight, with the standard WHO category.
Estimated due date and gestational age from the last menstrual period.
Drops per minute and mL/hour from volume, time and drop factor.
Weight-based dosing in mg per dose, per day, and mL from concentration.
Estimated GFR and CKD stage from serum creatinine, age and sex.
Cockcroft–Gault clearance from age, weight, sex and serum creatinine.
BSA in m² from height and weight, using the Mosteller formula.
Devine ideal body weight in kg from height and sex.
Frequently asked questions
Are these clinical calculators free to use?
Yes, completely free and no signup. They run entirely in your browser and nothing is stored on a server.
Can I rely on these for clinical decisions?
They are educational aids using standard formulas, not a substitute for clinical judgement. Always verify results against your own protocols and an authoritative reference.
Run your whole hospital, not just this tool.
Inside OlivHealth, values like these live on the patient record with your own clinical form builder, so nothing is re-typed and nothing is lost between visits.