Born in 2021: your life in weeks
If you were born in 2021, you turn 5 in 2026 and, as of October 2026, have lived roughly 248 to 300 weeks, depending on your birthday. You belong to Generation Alpha (2013–2024).
Age in 2026
5
after your birthday
Weeks lived
≈ 274
for a July 1 birthday
Days lived
≈ 1,919
for a July 1 birthday
Life expectancy, 2021
76.4
at birth, both sexes (CDC)
Average age at death now
78.9
for someone 5 today (SSA 2023)
Weeks to 90
4,422
A 2021 life calendar, filled in
One row per year of age, one box per week, drawn for a birthday of July 1, 2021. The vermilion box is the current week as of October 2026.
Then and now: life expectancy for the class of 2021
When you were born, U.S. life expectancy at birth was 76.4 years (79.3 for girls, 73.5 for boys). That number was calculated from the death rates of 2021, and it included every baby born that year, including those who died young. Having made it to about 5, the picture is different: under the SSA’s 2023 period table, the average age at death for someone your age is about 81.6 for women and 76.3 for men, 2.5 years above the 2021 at-birth average.
The same table suggests that, of people born in 2021 who are alive today, about 31% of women and 19% of men would reach 90, and 2.8% of women and 1.0% of men would reach 100. Period tables assume today’s death rates continue; if they keep falling, these figures will prove a little low.
Numbers like these describe a whole birth cohort, not any one person. For a personal statistical breakdown by exact age and sex, see Statistical Life Left.
Milestone years for 2021
- Age 182039
- Age 302051
- Age 402061
- Age 502071
- Age 652086
- Age 802101
- Age 902111
- Age 1002121
Greyed years have already passed. The 4,000th week arrives around 2097.
Questions people ask
How old is someone born in 2021?
Someone born in 2021 turns 5 in 2026. Before their birthday that year they are 4; after it, 5.
How many weeks has someone born in 2021 lived?
As of October 2026, between about 248 weeks (born December 31) and 300 weeks (born January 1). For a mid-year birthday it is about 274 weeks.
What was life expectancy for people born in 2021?
U.S. life expectancy at birth in 2021 was 76.4 years (79.3 for females and 73.5 for males), per CDC/NCHS. That is a period figure based on death rates in 2021, not a forecast for babies born then.
When will someone born in 2021 be 4,000 weeks old?
4,000 weeks is about 76.7 years, so around 2097.