what is the correct chest compression depth for an adult?

The correct chest compression depth for an adult is about 2 to 2.4 inches (5–6 cm) during CPR.

Quick Scoop: Exact Depth

• Aim for 2–2.4 inches (5–6 cm) straight down on the center of the chest.

• This is the current recommendation in line with modern CPR guideline updates from the mid‑2010s onward.

• Go at a rate of 100–120 compressions per minute, allowing full chest recoil each time.

Why That Depth Matters

• Too shallow (less than about 2 inches / 5 cm) does not generate enough blood flow to the brain and vital organs.

• Too deep (beyond about 2.4 inches / 6 cm) increases the risk of injuries like rib fractures without clear added benefit.

• Studies and guideline revisions balanced effectiveness (better circulation and survival odds) against safety (avoiding excessive injury).

Simple Way to Remember

• Push hard and fast in the middle of the chest, letting it come all the way back up each time, and aim for about the depth of a credit card’s long edge plus a bit more (roughly 5–6 cm).

This information is educational only and does not replace formal CPR training. For real emergencies, always follow your certified training and local medical guidance.

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