Instructions for Checking Blood Pressure

Use the right machine

Blood pressure machines that use arm cuffs are more accurate than those that use wrist cuffs, so try to buy one that measures around your upper arm.

Use the right cuff size

If your cuff is too small or too large, your home readings will be wrong. Each cuff will show a range where the fit is correct.  This is usually indicated by a white line on the cuff. If you're unsure, you can measure around your arm to check which cuff size is right for you. Read more about picking the right cuff size from the American Medical Association (AMA).

To check your blood pressure (BP):

• Sit still and relaxed for at least 5 minutes.

• Place the cuff on bare skin, not over clothing.

• Place the cuff just above the bend in your elbow.

• Keep both feet flat on the floor, not crossed.

• Sit up straight with your back supported.

• Prop your arm on a table so it's relaxed and at the same height as your heart.

• Do not talk while the machine is checking your BP.

You can also read this poster about checking your BP.

Avoid the following for 30 to 60 minutes before you check your BP:

• Smoking/vaping

• Caffeine

• Exercising

Be aware that stress, a full bladder, a full stomach, taking certain medications (such as some cold medicines), or using drugs may also make your BP go up, so you should avoid checking during these times.