A normal ejection fraction (EF) is generally considered to be about 50% to 70% for the left ventricle, which is the main pumping chamber of the heart.

What ejection fraction means

Ejection fraction is the percentage of blood that leaves the left ventricle each time the heart contracts.

For example, an EF of 60% means 60% of the blood in that chamber is pumped out with each beat, while the rest remains for the next contraction.

Normal range by guideline

Most major cardiology bodies define normal left ventricular EF as:

  • Typically 55%–70% (American Heart Association / Mayo‑style ranges).
  • Some sources also accept 50%–70% as “normal,” with values below 50% suggesting possible heart dysfunction.

In more granular tables from recent guidelines, “normal” is often:

  • Men: roughly 52%–72%
  • Women: roughly 54%–74%
    with mildly abnormal when EF dips into the low‑50s.

Quick EF classification table

Typical EF ranges (adults)

[5][7] [9][3] [3][5] [5][3]
Category EF range (approx.) What it usually suggests
Normal 55–70% Heart pumps blood effectively; no major systolic dysfunction.
Mildly reduced 41–54% Some reduction in pumping strength; may be early heart failure sign.
Moderately reduced 30–40% Clear impairment in how much blood the heart pumps out.
Severely reduced <30% Significant pumping problem; often linked to advanced heart failure.

A few important nuances

  • Some people have normal EF but still develop heart failure (called “heart failure with preserved ejection fraction” or HFpEF), meaning the heart is stiff rather than weak.
  • EF is usually measured by echocardiogram, MRI, or nuclear scan , and results can vary slightly between labs and methods.

If you’ve been told your EF is “low” or “borderline,” it’s worth discussing with a cardiologist, because treatment and lifestyle changes can often help improve heart function and symptoms.

Information gathered from public forums or data available on the internet and portrayed here.