Age Difference Calculator

Calculate exact age gaps between people instantly. Get results in years, months, weeks, and days.

Calculate Age Difference

First Person’s Birth Date

Second Person’s Birth Date

Age Difference Results

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How to Use This Age Difference Calculator

This comprehensive guide will help you get the most accurate results from our age difference calculator. Start by entering two birth dates in the calculator above. The tool accepts dates from 1900 to present day.

After entering dates, click calculate to see detailed results including years, months, weeks, and days difference. For precise calculations, always use complete birth dates including day and month, not just the year.

Use the Related Calculation Tools for specialized age calculations. Current Age shows your exact age today. Age in Weeks converts your lifetime to weeks, useful for tracking development. Age in Days shows your total days lived. Future Age calculates your age at any future date.

All calculations happen locally in your browser for privacy. No data is sent to servers. The calculator accounts for leap years and varying month lengths for maximum accuracy.

Important Information

This calculator provides approximate results for informational purposes. Results are based on standard calendar calculations and should not be used for legal or official documentation. All calculations occur in your browser for privacy protection.