Where on the sternum are chest compressions done?

This page gives information and guidance about cardiopulmonary resuscitation (CPR). This includes hands-only CPR and CPR with rescue breaths.

If someone is unconscious and not breathing normally, call 999 and start CPR straight away.

When you call 999 for an ambulance, you should be given basic life-saving instructions over the phone, including advice about CPR.

CPR on adults

If you have been trained in CPR, including rescue breaths, and feel confident using your skills, you should give chest compressions with rescue breaths.

If you're not completely confident, attempt hands-only CPR instead.

Hands-only CPR

To carry out a chest compression:

  1. Kneel next to the person and place the heel of your hand on the breastbone at the centre of their chest. Place the palm of your other hand on top of the hand that's on their chest and interlock your fingers.
  2. Position yourself so your shoulders are directly above your hands.
  3. Using your body weight (not just your arms), press straight down by 5 to 6cm (2 to 2.5 inches) on their chest.
  4. Keeping your hands on their chest, release the compression and allow their chest to return to its original position.
  5. Repeat these compressions at a rate of 100 to 120 times a minute until an ambulance arrives or for as long as you can.

CPR with rescue breaths

  1. Place the heel of your hand on the centre of the person's chest, then place the palm of your other hand on top and press down by 5 to 6cm (2 to 2.5 inches) at a steady rate of 100 to 120 compressions a minute.
  2. After every 30 chest compressions, give 2 rescue breaths.
  3. Tilt the person's head gently and lift the chin up with 2 fingers. Pinch the person's nose. Seal your mouth over their mouth and blow steadily and firmly into their mouth for about 1 second. Check that their chest rises. Give 2 rescue breaths.
  4. Continue with cycles of 30 chest compressions and 2 rescue breaths until they begin to recover or emergency help arrives.

Information:

Coronavirus (COVID-19) advice

If there's a chance the person who's unwell has COVID-19, place a cloth or towel over their mouth and nose and do hands-only CPR until an ambulance arrives.

For more information, see:

  • Resuscitation Council UK statement on COVID-19 in relation to CPR and resuscitation
  • COVID-19 guidance for first responders on GOV.UK

CPR on children

You should carry out CPR with rescue breaths on a child. It's more likely children will have a problem with their airways and breathing than a problem with their heart.

Children over 1 year

  1. Open the child's airway by placing 1 hand on their forehead and gently tilting their head back and lifting the chin. Remove any visible obstructions from their mouth and nose.
  2. Pinch the child's nose. Seal your mouth over their mouth, and blow steadily and firmly into their mouth, checking that their chest rises. Give 5 initial rescue breaths.
  3. Place the heel of 1 hand on the centre of the child's chest and push down by 5cm (about 2 inches), which is approximately one-third of the chest diameter. The quality (depth) of chest compressions is very important. Use 2 hands if you can't achieve a depth of 5cm using 1 hand.
  4. After every 30 chest compressions at a rate of 100 to 120 a minute, give 2 breaths.
  5. Continue with cycles of 30 chest compressions and 2 rescue breaths until the child begins to recover or emergency help arrives.

Infants under 1 year

  1. Open the infant's airway by placing 1 hand on their forehead and gently tilting the head back and lifting their chin. Remove any visible obstructions from their mouth and nose.
  2. Place your mouth over the infant's mouth and nose and blow steadily and firmly into their mouth, checking that their chest rises. Give 5 initial rescue breaths.
  3. Place 2 fingers in the middle of the infant's chest and push down by 4cm (about 1.5 inches), which is approximately one-third of the chest diameter. The quality (depth) of chest compressions is very important. Use the heel of 1 hand if you can't achieve a depth of 4cm using the tips of 2 fingers.
  4. After 30 chest compressions at a rate of 100 to 120 a minute, give 2 rescue breaths.
  5. Continue with cycles of 30 chest compressions and 2 rescue breaths until the infant begins to recover or emergency help arrives.

Page last reviewed: 15 March 2022
Next review due: 15 March 2025

When someone’s heart stops, they’re in cardiac arrest, you should jump into action to do chest compressions as soon as possible. The depth of compression is different between adults and children.

2 to 2.4 inches on an adult.

Since the update to the CPR guidelines in 2015, the depth of chest compressions shifted from 2 inches, to 2-2.4 inches deep. You’ll do these compressions at a rate of 100-120 compressions per minute, on the sternum in the center of the chest. This is the same for both men and women, so don’t be afraid when the need to do CPR arises.

Watch our Adult CPR Training Video

1/3 the depth of the chest on a child or a baby.

The rate of compressions is the same here as on an adult: 100-120 compressions per minute. When doing chest compressions on a baby, use two fingers. For a child use one hand.

Watch our Child CPR Training Video

Watch our Infant CPR Training Video

What if I hear cracking sounds? Did I break a rib?

When you do compressions properly, you’re likely going to hear cracking sounds. Don’t stop doing CPR. These sounds can be caused by cartilage or ribs cracking, but the damage is not serious. Remember: the reason you’re doing CPR is to help the person until paramedics, EMTs or the next level of care arrives. You’re giving the person a fighting chance, and you should continue to do compressions. Breaking a rib is not something to be afraid of. You can’t make their situation worse, and you can’t be sued for giving someone CPR thanks to the Good Samaritan laws.

Is CPR done on the sternum?

Since the update to the CPR guidelines in 2015, the depth of chest compressions shifted from 2 inches, to 2-2.4 inches deep. You'll do these compressions at a rate of 100-120 compressions per minute, on the sternum in the center of the chest.

Where is the landmark for chest compressions?

The site of compression should be at the centre of the chest/lower half of the sternum.