Age Calculator
Enter a birth date and get the precise breakdown rather than a rounded year, with the next-birthday countdown for form fields that ask for it.
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Nothing you enter here is sent anywhere. There is no file and no request to our server - the work is done in your browser and disappears when you close the page.
How It Works
- Enter — Fill in the values the tool asks for.
- Run — Press the button; an empty field is reported by name rather than read as zero.
- Read — The answer comes with the working behind it, so you can check the figure.
- Take it — Copy the result, or download it where the tool offers that.
Frequently Asked Questions
Are leap years counted correctly?
Yes. Day counting uses real calendar dates, so a span crossing 29 February is one day longer than the same span in a common year.
Is the end date included?
Both are offered: the plain difference in days, and the inclusive count where both endpoints are counted, because "days between" and "how many days from X to Y inclusive" are different questions.