Ejection Fraction

Calculator of Left / Right Ventricular Ejection Fraction


What Is The Ejection Fraction?

Ejection Fraction shows how much blood the left ventricle is pumping out with each contraction, this is a measurement that is shown in percentage. For example, if you get a percentage of 50% then it means that 50% of the total amount of blood in the left ventricle is pumped with each contraction/ heartbeat.

The Ejection Fraction mainly shows how well the heart is pumping out blood, the normal amount of ejection fraction is between 50-70 percent.

Alternate Formula For Ejection Fraction

EF = (SV/EDV) x 100


  • EF = Ejection Fraction
  • SV = Stroke Volume
  • EDV = End Diastolic volume


A person has a stroke volume of 120 mL and an end-diastolic volume of 150 mL, calculate the Ejection Fraction.


EF = (SV/EDV) x 100
= (120/150) x 100
= 0.8 x 100
= 80%

How To Calculate Ejection Fraction

In order to use the calculator for the Ejection Fraction, just follow the steps and you will get the required results.

Step 1: Enter Your Stroke Volume

In the first step, we have to add the stroke volume. The stroke volume is the amount of blood pumped out of the left ventricle during each systolic contraction or heartbeat.

Step 2: Enter End Diastolic Volume

In the second and last step, we have to add the end-diastolic volume. The end-diastolic volume shows the amount of blood in the left ventricle before the heart contracts. As shown, this is used to calculate the stroke volume and ejection fraction.

What Will Be The Results?

Upon entering all the data you will be given a figure between 1 and 100. This is going to be your ejection fraction, a normal ejection fraction is between 50-70 percent.

There are still medical cases where a person can have heart failure while still having a normal and healthy ejection fraction. If the person’s heart muscles become thick and stiff then it means that enough blood won’t be pumped.

Different Tests For Ejection Fraction

If you are having some problems, then your doctor is going to recommend different tests for the Ejection Fraction. Some of those tests could be:

  • MUGA Scan
  • CAT Scan
  • Cardiac Catheterization
  • Echocardiogram
  • Nuclear Stress Test