Normal blood pressure varies   depending on a person’s age, gender, and health, and can be affected by many different factors, such as stress, a sedentary lifestyle, and an unhealthy diet.

The World Health Organization recommends that everyone maintain healthy blood pressure levels, especially after age 45. The  WHO’s normal blood pressure range  is the reference to use for monitoring blood pressure levels.

The force exerted by blood on the walls of blood vessels is known as blood pressure. The unit of measurement for BP is millimeters of mercury. Systolic blood pressure (the pressure of the heart when it pumps blood) and diastolic blood pressure (the pressure of the heart when it is at rest) are also commonly measured.

Normal blood pressure among adults is 120 mmHg (systolic) and 80 mmHg (diastolic). When the systolic pressure exceeds 140 and the diastolic pressure exceeds 90, it is considered  hypertension .

Blood pressure also varies depending on age and gender. The following table lists all reference values.