Tip: set “Calculate age on” for school admissions, retirement checks, and future-date planning.
Our Age Calculator helps you calculate your exact age in years, months, and days from your date of birth (DOB). It’s useful for everyday needs like filling out government forms, checking eligibility for school admissions, planning retirement, tracking anniversaries, or simply answering “how old am I?” accurately.
To use it, pick your DOB and (optionally) choose an “age on a future date.” The calculator compares your birth date to the selected date and counts full years first, then full months, then remaining days. This approach matches how age is typically measured and handles tricky edge cases like different month lengths and leap years. You’ll also see the day of the week you were born and a next birthday countdown showing how many days are left until your upcoming birthday.
Need to compare two people? Use the age difference section to calculate the exact gap in years, months, and days, plus the total number of days between birthdays. Everything runs instantly in your browser using the JavaScript Date object, so it’s lightweight and private—no sign-up, no uploads, and no stored data.