ToolNestFree Online Age Calculator
Quick answer: How old am I, exactly? Enter your date of birth and our free age calculator tells you your precise age in years, months, and days — plus total days lived, the day of the week you were born, and a live countdown to your next birthday.
How old am I, exactly? Enter your date of birth and our free age calculator tells you your precise age in years, months, and days — plus total days lived, the day of the week you were born, and a live countdown to your next birthday.
—Years
—Months
—Days
✓ Free forever · ✓ No signup · ✓ Runs in your browser — your data never leaves your device.
How to Use the Age Calculator
- Enter (or pick) your date of birth.
- Click Calculate Age.
- See your exact age in years, months, and days — plus fun stats below.
- Great for forms, milestones, and birthday countdowns.
Why Use Our Age Calculator?
- Exact age — years, months, and days, leap years handled.
- Total days lived — the big number, computed precisely.
- Birthday facts — weekday of birth and countdown to your next birthday.
- Private — your birth date never leaves your browser.
Frequently Asked Questions
How is age calculated exactly?
Full years first, then remaining full months, then remaining days — accounting for leap years and varying month lengths.
Does it count leap years?
Yes — February 29 birthdays and leap days are handled correctly in the day count.
What day of the week was I born?
The calculator shows it automatically, along with how many days until your next birthday.
Can I calculate someone else's age?
Yes — enter any past date of birth; it's perfect for kids' milestone tracking too.
Is my birth date stored anywhere?
No. The calculation runs entirely in your browser.