Do you compress the chest 2 inches or 3 in adult CPR?

The correct answer is 2 inches.

According to the American Heart Association (AHA) guidelines for adult CPR, the chest should be compressed at least 2 inches (5 centimeters) deep. This depth of compression is necessary to ensure that the heart is receiving adequate blood flow. Compressing the chest too shallowly may not be effective in circulating blood, while compressing too deeply can increase the risk of injury.