this is not such an easy answer... the textbook answer is ever changing...years ago, the normal blood pressure was 120/80 and it was commonplace to say that as you matured, it was 100 + your age for the systolic and 1/2 that number for the diastolic for eg: if you were 80 years old, then it would be 180/90 but....every so often, a group of experts get together (most likely at the insistence of the insurance companies) to modify the number so that more people fall OUT of the norm so that the insurance company now has a bigger loophole for which NOT to pay! today, it is the general consensus that your blood pressure should be 100/60 (the lower the blood pressure, the less stress it puts on the vasculature and the vital structures {brain, kidneys, lungs...} as it is the kidneys that control the blood pressure...so the less stress involved, the less of a chance to stroke out, have a heart attack... there are many factors that can control the blood pressure...excess weight, smoking, too much salt in the diet, no activity, hereditary, genetics, and simple things like caffeine, stress, certain medications {like sudafed(r)} can cause the blood pressure to escalate... so, if you do not smoke, not overweight, no SALT, stress, etc...then your BP should be 100/60 good luck