What your blood pressure numbers mean
Two numbers, four ranges, and what to do about each. A plain guide to reading your result.
A blood pressure reading has two numbers. The top one is the pressure when your heart beats; the bottom one is the pressure while it rests between beats. Both matter.
The ranges
Normal: below 120 over 80.
Elevated: 120 to 129 on top, with the bottom below 80.
High, stage 1: 130 to 139 on top, or 80 to 89 on the bottom.
High, stage 2: 140 or more on top, or 90 or more on the bottom.
One high reading does not mean you have high blood pressure. Pressure rises when you are rushed, in pain or have just had coffee. We look at several readings over a few weeks.
Checking at home
Sit quietly for five minutes first, with your back supported and your feet flat. Rest your arm at heart height. Take two readings a minute apart, morning and evening, and write them down for your doctor.
When to act straight away
A reading above 180 over 120 with chest pain, shortness of breath, a severe headache or trouble speaking is an emergency. Call 911.
This article is general information, not advice about your own health. If something worries you, see your doctor.