How Deep Should Chest Compressions Be? (And Why It Matters)

Chest compression depth is one of the most important parts of effective CPR.

Recommended Compression Depth

• Adults: At least 2 inches (5 cm), not more than 2.4 inches

• Children: About 2 inches or 1/3 chest depth

• Infants: About 1.5 inches or 1/3 chest depth

Why Depth Matters

Shallow compressions do not move enough blood to the brain and organs.

Proper depth helps maintain circulation and increases survival chances.

Common Mistakes

• Not pushing deep enough

• Fatigue reducing compression depth

• Hesitation due to fear of injury

Depth and Rate Together

• 100–120 compressions per minute

• Allow full chest recoil

• Maintain consistent depth

Technique Tips

• Keep arms straight

• Use body weight

• Position shoulders over hands

When in Doubt

Push harder rather than too lightly.

Practice Makes the Difference

Knowing the right depth is a start—but building muscle memory takes hands-on practice. CPR Safety 411 offers CPR and AED training where you'll practice proper compression technique on a manikin with real-time feedback. For healthcare-adjacent roles requiring deeper skill validation, we offer BLS certification. Ready to get started? Request training today.