Normal

• Systolic 119 mm Hg or below
• Diastolic 79 mm Hg or below

Prehypertension

• Systolic 120–139 mm Hg
• Diastolic 80–89 mm Hg

High blood pressure (hypertension)

• Systolic 140 mm Hg or above
• Diastolic 90 mm Hg or above

High blood pressure is also classified into stages.

• Stage 1 high blood pressure:
  • Systolic 140–159 mm Hg
  • Diastolic 90–99 mm Hg

• Stage 2 high blood pressure:
  • Systolic 160 mm Hg or higher
  • Diastolic 100 mm Hg or higher