How Many Weeks Old Am I?
Enter your date of birth to see exactly how many weeks old you are. Your age shown in weeks, days, years, and months — updated instantly.
How Many Weeks Old Are You?
Ever wondered exactly how many weeks old you are? Our weeks old calculator gives you the precise answer instantly. Enter your date of birth and see your age in weeks alongside years, months, and days.
Weeks are the standard way to measure age for newborns and infants. Doctors and parents track the first 12 weeks of life closely — after that, age typically shifts to months. This how many weeks old am I calculator applies to anyone: babies, children, teens, and adults alike.
Age in weeks is different from gestational age. Gestational age counts from conception and is used during pregnancy. This calculator measures time since birth — how many weeks you've been alive in the outside world. If you're looking for pregnancy timeline tracking, gestational age is the relevant measure.
Age in Weeks by Year
- 1 year old = 52 weeks old
- 5 years old = 260 weeks old
- 10 years old = 521 weeks old
- 18 years old = 938 weeks old
- 21 years old = 1,095 weeks old
- 30 years old = 1,564 weeks old
- 40 years old = 2,087 weeks old
- 50 years old = 2,609 weeks old
- 60 years old = 3,131 weeks old
- 70 years old = 3,653 weeks old
Seeing your age in weeks puts time in perspective. A week is short enough to feel tangible but long enough to notice change. Try our other calculators for different views of your age: days alive or hours alive.