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Ejection Fraction Calculator

Work out ejection fraction instantly with clear inputs, formula shown and shareable results.

About Ejection Fraction Calculator

Expresses the stroke volume as a share of end-diastolic volume, the standard measure of left ventricular systolic function.

Formula

Ejection fraction

EF (%) = (EDV - ESV) / EDV x 100

Worked example

With the default values below, Ejection Fraction Calculator returns Ejection fraction of 58.3%. Change any input above and every figure here is recalculated in your browser.

Inputs used

End-diastolic volumeaccepts 20–400 mL
120 mL
End-systolic volumeaccepts 5–350 mL
50 mL

Results

Ejection fraction
58.3%
Stroke volume
70.0 mL
Classification
Normal range (>=50%)

Step by step

  1. 1Values used
  2. 2Ejection fraction
  3. 3Ejection fraction= 58.3
  4. 4Stroke volume= 70.0 mL
  5. 5Classification= Normal range (>=50%)

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

What counts as a normal ejection fraction?

50% or above is generally considered normal, 41-49% mildly reduced and 40% or below reduced.

Can ejection fraction exceed 100%?

No. End-systolic volume is always smaller than end-diastolic volume, so EF stays below 100%.

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