Age Calculator
/age-calculatorCalculate exact age in years, months, days, and hours from any date of birth up to today.
Exact age — down to months, days, and hours — is needed for forms, eligibility checks, and milestones. This calculator computes precise age from any birth date up to today. It handles leap years correctly. Everything is computed locally, with no personal data leaving your browser.
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FAQ
Frequently asked questions
Everything you need to know about age calculator.
How precise is the age calculation?
Your age is shown as years, months, and days using calendar-aware math that accounts for months of different lengths and leap years. The tool also lists total months, weeks, days, hours, and minutes since birth.
Can I calculate age for a date other than today?
Yes. The as-of date field lets you pick any reference date; it defaults to today, so you can compute ages for forms, documents, or milestones on any chosen day.
What happens if I pick a birth date in the future?
The tool shows the error 'Birth date must be on or before the as-of date' instead of returning a negative age, so invalid inputs never produce confusing results.
Does it show when my next birthday is?
Yes. The totals panel includes a 'Next birthday in' row that counts the days until the next birthday, or says 'today' when the birthday is today.
Is my data sent anywhere?
No. All date math runs locally in your browser with the date-math library; your birth date and the as-of date never leave your device.
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