🎂 Age Calculator
Calculate your exact age in years, months, days, hours, and minutes from your date of birth.
About this tool
Use this age calculator when you need your exact age from date of birth—not just years, but months, days, hours, and minutes where it matters. Enter your birthday once and you get a clear breakdown that respects leap years and month lengths, which is why “how old am I” searches deserve more than a rough guess. The tool also shows how many days remain until your next birthday and which day of the week you were born, common questions people pair with age in days or “date of birth calculator” lookups. Parents checking kids’ ages, forms that ask for age in years and months, and curiosity about milestones all fit here. Everything runs in your browser: your birth date is not stored on our servers, so you can use it as a private date of birth calculator. Whether you say age calculator, how old am I, or count my age in days, the goal is the same—one place, instant results, and wording you can read at a glance.
Frequently Asked Questions
How is my exact age calculated?
Your age is calculated by subtracting your date of birth from today's date, accounting for leap years and varying month lengths to give you the exact years, months, and days.
How many days old am I?
The total number of days is calculated by finding the difference in milliseconds between your birth date and today, then dividing by the number of milliseconds in a day.
When is my next birthday?
The days until your next birthday are counted from today to your upcoming birthday date in the current or next year.
What day of the week was I born?
This is determined using JavaScript's Date API which can accurately calculate the day of the week for any historical date.
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