Calculators
Date Difference Calculator
Calculate the difference between two dates in days, weeks, months, and years when you need quick date math.
What Age Calculator helps you do
People usually search for this when they need an exact age instead of a rough answer, especially for school forms, HR paperwork, healthcare records, and birthday planning.
Enter a birth date and, if needed, a custom as-of date to see age broken down into years, months, days, and total days.
Use the tool
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Frequently asked questions
How do I calculate age from date of birth?
Enter the birth date and the calculator will compare it against today or any custom reference date you choose.
Can I change the as-of date?
Yes. You can calculate age against today or a custom reference date.
Why would I use a custom reference date?
It helps when checking age at the time of enrollment, eligibility, travel, or a past or future event.