To read a blood pressure chart by age, locate your age range, then view the corresponding normal systolic and diastolic numbers, notes Disabled World. The chart offered by Disabled World features average blood pressure readings for 14 different age ranges. For adults between the ages of 25 and 29, a normal blood pressure reading is 120/80 millimeters of mercury. Average blood pressure increases with age.
Having high blood pressure has the same effects on adults of all ages, so standard blood pressure charts do not vary by age, according to Blood Pressure UK. Readings are categorized as normal blood pressure, prehypertension, stage 1 hypertension and stage 2 hypertension, states Mayo Clinic.
Blood pressure readings of 120/80 millimeters of mercury or lower indicate normal blood pressure, readings between 120/80 and 139/89 millimeters of mercury indicate prehypertension, and readings between 140/90 and 159/99 millimeters of mercury indicate stage 1 hypertension. Blood pressure readings of 160/100 millimeters of mercury or higher indicate stage 2 hypertension, according to Mayo Clinic.
These categories help dictate treatment, explains Mayo Clinic. Some patients can successfully lower blood pressure by following a healthy lifestyle, while others require medication, and treatment must be more aggressive if a patient also has diabetes or a heart condition.