Normal blood pressure for men is 12 Systole over 8 Diastole. Or 12 to 8 For women, it is 11 to 7.5
If you want a more accurate estimate based on age, I have given it below
| Age | Systole | Diastole |
Male | 21 – 25 | 12.5 | 7.5 |
26 – 30 | 11.5 | 7.5 |
31 – 35 | 11.5 | 7.5 |
36 – 40 | 12.5 | 7.5 |
41 – 45 | 11.5 | 7.5 |
46 – 50 | 11.5 | 8.5 |
51 – 55 | 12.5 | 8.5 |
56 – 60 | 12.5 | 7.5 |
61 – 65 | 14.5 | 7.5 |
Female | 21 – 25 | 11.5 | 7.5 |
26 – 30 | 11.5 | 7.5 |
31 – 35 | 11.5 | 7.5 |
36 – 40 | 11.5 | 7.5 |
41 – 45 | 11.5 | 7.5 |
46 – 50 | 12 | 7.5 |
51 – 55 | 12.5 | 7.5 |
56 – 60 | 13.5 | 7.5 |
61 – 65 | 13.5 | 7.5 |