What is the Age Calculator?
This tool calculates the exact difference between two dates in years, months and days — accounting properly for varying month lengths and leap years, not just a rough days-divided-by-365 estimate. Use it to check your exact current age, calculate age eligibility for a government form or exam, or find the precise gap between any two dates (anniversaries, deadlines, project durations).
How to Use This Tool
- Enter the Date of Birth (or the earlier of the two dates you're comparing).
- The "As of Date" defaults to today — change it to calculate age at any other date.
- See the exact years/months/days breakdown, plus total days, weeks and months.
Frequently Asked Questions
Can I calculate age as of a past or future date?
Yes — change the "As of Date" field to any date; it defaults to today.
Can I use this to find the difference between two dates?
Yes — set "Date of Birth" and "As of Date" to any two dates to get the exact difference between them.
Last updated: August 2026
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