Time & Date
Age Calculator
Find your exact age in years, months, days, hours, minutes, and seconds — and how many days until your next birthday.
Default: today
Your age
30
years
30 years, 10 months, 13 days
Age in different units
Months
370months + 13 days
Weeks
1,610weeks
Days
11,275days
Hours
270,600hours
Minutes
16,236,000minutes
Seconds
974,160,000seconds
Next birthday
Days until next birthday
48days
Next birthday
Monday, June 15, 2026
Why an exact age calculator?
Most people know their age in years, but rarely the exact months and days. This calculator gives you the precise breakdown — useful for legal documents, retirement planning, milestone celebrations, or just satisfying curiosity about how many seconds you've been alive.
Frequently Asked Questions
How is age calculated?▾
Age in years is calculated by subtracting the birth year from the current year, then adjusting if the birthday has not yet occurred this year. We compute the exact years/months/days breakdown by accounting for the calendar (different month lengths, leap years).
Why is my age different in years vs months vs days?▾
A 30-year-old person has lived approximately 360 months, 10,950 days, or 262,800 hours. The unit changes the number but not the elapsed time. Months and weeks aren't exact divisions of years (12 months ≠ 365.25 days), so totals shift slightly depending on the unit.
Does this account for leap years?▾
Yes. We use the actual calendar dates (JavaScript Date object), so leap years are handled automatically. Someone born on Feb 29 will see "0 years" only on non-leap-year Feb 28 / Mar 1 — depending on jurisdiction conventions, that may or may not match legal age calculations.
Can I calculate age between two dates that aren't today?▾
Yes. The "Age at date" field defaults to today, but you can change it to any date. Useful for: figuring out how old someone was at a historical event, calculating age at retirement, or figuring out how old someone will be on a future date.
Is this the same as legal age?▾
In most countries (US, EU, etc.), legal age is calculated by completed years on or after your birthday — which matches our "years" output. A few jurisdictions (parts of East Asia traditionally) count age differently, so check local rules if it matters.