How to find your age in days
- 1
Enter your birthday
Pick the date you were born.
- 2
See your total
Your age in days appears instantly, with weeks, months, hours, minutes and seconds.
- 3
Check your milestones
See when you turn 10,000, 20,000 and 30,000 days old, and which milestones you've already passed.
How it's calculated
Your age in days is the number of calendar days between your birthday and today. Each year adds 365 days, plus one more for every February 29 you've lived through. That's why two people of the same age in years can differ by a day.
Day milestones in years
| Days old | Roughly | |
|---|---|---|
| 1,000 | 2.7 years | Details |
| 5,000 | 13.7 years | Details |
| 10,000 | 27.4 years | Details |
| 15,000 | 41.1 years | Details |
| 20,000 | 54.8 years | Details |
| 25,000 | 68.4 years | Details |
| 30,000 | 82.1 years | Details |
Days old by birth year
How many days old someone born on January 1 of each year is on January 1, 2027:
| Born | Days old on Jan 1, 2027 | Turned 10,000 days |
|---|---|---|
| January 1, 1950 | 28,124 | May 19, 1977 |
| January 1, 1955 | 26,298 | May 19, 1982 |
| January 1, 1960 | 24,472 | May 19, 1987 |
| January 1, 1965 | 22,645 | May 19, 1992 |
| January 1, 1970 | 20,819 | May 19, 1997 |
| January 1, 1975 | 18,993 | May 19, 2002 |
| January 1, 1980 | 17,167 | May 19, 2007 |
| January 1, 1985 | 15,340 | May 19, 2012 |
| January 1, 1990 | 13,514 | May 19, 2017 |
| January 1, 1995 | 11,688 | May 19, 2022 |
| January 1, 2000 | 9,862 | May 19, 2027 |
| January 1, 2005 | 8,035 | May 19, 2032 |
| January 1, 2010 | 6,209 | May 19, 2037 |
| January 1, 2015 | 4,383 | May 19, 2042 |
| January 1, 2020 | 2,557 | May 19, 2047 |
Other big “age in units” milestones
Days aren't the only unit with fun round numbers. These milestones are roughly the same for everyone:
| Milestone | In days | About |
|---|---|---|
| 1 million minutes | 694 | 1 year, 11 months |
| 1,000 weeks | 7,000 | 19 years, 2 months |
| 1 billion seconds | 11,574 | 31 years, 8 months |
| 500,000 hours | 20,833 | 57 years |
| 3,000 weeks | 21,000 | 57 years, 6 months |
Your life in days: by life stage
Approximate days spent in each stage of life, using the average year of 365.2425 days:
| Stage | Ages | About |
|---|---|---|
| Baby and toddler | 0–3 | 1,096 days |
| Childhood | 3–12 | 3,287 days |
| Teenage years | 13–19 | 2,557 days |
| Your twenties | 20–29 | 3,652 days |
| A typical working life | 22–67 | 16,436 days |
| To age 80 | 0–80 | 29,219 days |
Seen that way, a whole decade is only about 3,650 days, which is one reason people find the days-old number so striking. An 80-year life is a little under 30,000 days.
Days old in other units
Alongside days, the calculator shows your age in weeks, months, hours, minutes and seconds. Weeks and hours are exact multiples of your day count. Months are estimated using the average month of 30.44 days, so the figure is approximate. For exact calendar months, use the Age Calculator.
| If you are… | Weeks | Hours | Minutes |
|---|---|---|---|
| 1,000 days old | 142 | 24,000 | 1,440,000 |
| 5,000 days old | 714 | 120,000 | 7,200,000 |
| 10,000 days old | 1,428 | 240,000 | 14,400,000 |
| 20,000 days old | 2,857 | 480,000 | 28,800,000 |
Leap days you've lived through
Every February 29 you've lived through adds one day to your total. That's why two people who are both 40 can be a day apart in days old. Here's how many leap days someone born on January 1 of each year has lived through by January 1, 2027:
| Born | Leap days lived | Most recent | Next |
|---|---|---|---|
| January 1, 1950 | 19 | Feb 29, 2024 | Feb 29, 2028 |
| January 1, 1960 | 17 | Feb 29, 2024 | Feb 29, 2028 |
| January 1, 1970 | 14 | Feb 29, 2024 | Feb 29, 2028 |
| January 1, 1980 | 12 | Feb 29, 2024 | Feb 29, 2028 |
| January 1, 1990 | 9 | Feb 29, 2024 | Feb 29, 2028 |
| January 1, 2000 | 7 | Feb 29, 2024 | Feb 29, 2028 |
| January 1, 2010 | 4 | Feb 29, 2024 | Feb 29, 2028 |
| January 1, 2020 | 2 | Feb 29, 2024 | Feb 29, 2028 |
Count days old in a spreadsheet
In Excel or Google Sheets, put your birthday in cell A1 and type =TODAY()-A1 in another cell, formatted as a number. To find the date of your 10,000th day, use =A1+10000 formatted as a date.
Why the 10,000-day milestone is popular
Birthdays come every year, but day milestones come rarely and they're easy to miss. The 10,000th day lands in your late twenties, at a time when many people are thinking about where their life is heading, so it's become a popular excuse for a party, a trip or a moment of reflection. Some people mark 20,000 days in their mid-fifties the same way. Because no one else shares your exact day count, it's a personal milestone in a way a birthday isn't.
Fun ways to celebrate
Your 10,000th day
A popular milestone in your late twenties. Some people throw a “10K day” party instead of a regular birthday.
Round numbers
12,345 days and 22,222 days are fun dates to mark, and they only come once.
Couples
Add both your ages in days to find a shared milestone, or count days together with the Days Since Calculator.
Babies
Day 100 is a big celebration in many cultures, such as the Korean baek-il.
Age in days by age
Want your age in years, months and days instead? Use the Age Calculator.