Work out cardiac output instantly with clear inputs, formula shown and shareable results.
Multiplies stroke volume by heart rate to give cardiac output, then divides by body surface area for the cardiac index.
Cardiac output
CO (L/min) = stroke volume (mL) x heart rate (bpm) / 1000; CI = CO / BSA
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Around 4 to 8 L/min at rest in adults, with a cardiac index near 2.5 to 4.0 L/min/m2.
Indexing to body surface area allows outputs from people of different sizes to be compared.