Enter your blood pressure and see which official category it falls in — this is a lookup, not a diagnosis or risk calculation.
The categories follow the European ESH/ESC classification, an internationally recognized clinical standard for cardiovascular risk assessment. If systolic and diastolic fall into two different categories, the higher of the two is used (the same principle used in clinical practice).
Because actual cardiovascular risk depends on many more factors than blood pressure alone — age, sex, smoking, cholesterol, family history and more. That kind of personal risk calculation is something healthcare professionals do with dedicated clinical tools, not something a simple calculator should try to replace.
Not necessarily. Blood pressure varies naturally throughout the day and is affected by stress, caffeine, activity and the measurement situation itself ("white coat" effect at the doctor's office). Repeat the measurement while at rest, on several occasions, and contact a doctor if the level stays high.
Systolic (the higher number) is the pressure when the heart contracts and pumps blood out. Diastolic (the lower number) is the pressure when the heart is at rest between beats.