Age Calculator
Calculate your exact age in years, months, days, hours, and minutes from any birth date.
The age calculator is one of the most-searched tools on the internet. People use it to quickly figure out how old someone is on a specific date, count down to milestone birthdays, calculate age for legal or insurance purposes, or just settle a birthday-related debate. The exact age with years, months, and remaining days is more precise than the year count alone.
Legal age calculations often require precision. The age for voting, drinking, retirement eligibility, and Medicare enrollment are all exact — the day of your birthday matters, not just the year. Courts also count age exactly when age thresholds are legally relevant.
How exact age is calculated
Years are counted by how many complete birthdays have passed from birth to the calculation date. Months are counted within the current year. Remaining days are counted within the current month. The result gives the age as "X years, Y months, Z days" — the most precise statement of how old a person is on a given date.
Frequently asked questions
When exactly do you turn a specific age?
In US legal practice, you turn an age on the anniversary of your birth date. Someone born January 5, 2000 turns 25 on January 5, 2025 — not January 4 or January 6. Some countries calculate age differently: South Korea traditionally adds one year at birth and another at the new year, though this has been changing.
How do I calculate age for a deceased person?
Enter the birth date and the date of death in the "as of" field. The calculator will give the exact age at time of death in years, months, and days.