Calculate your exact age in years, months, and days, count working business days between any two dates, and compute future calendar deadlines. 100% private.
28 years, 5 months, and 12 days old
Compute your exact chronological age or count working business days between any two dates instantly. Runs 100% locally in your browser with complete privacy.
Fast and easy from start to finish
Choose between 'Calculate Exact Age' or 'Date Range Difference'.
Pick your birth date or starting and ending calendar dates.
Review elapsed time, business days, and copy summaries with one tap.
What you can do with this tool
Exact age breakdown in total years, months, days, hours, and minutes.
Next birthday live countdown with days remaining and weekday indicator.
Date difference calculator with total calendar days, elapsed weeks, and working business days (excluding weekends).
100% private in-browser computation with zero tracking.
Unlock batch scale, higher resolution, and expanded limits
Save birthdays and anniversaries for entire teams or family groups.
Calculate working hours excluding custom holidays and four-day work weeks.
Download milestone countdown summaries for retirement and project planning.
Everyday walkthroughs and starter ideas for Date Difference & Age Calculator
Find exact age for someone born on July 14, 1995.
Calculate working days between March 1 and June 30 for project scheduling.
File requirements, capabilities, and system limits
Public holidays are not excluded from working days as holidays vary by country and region.
Helpful definitions of features and parameters
Calendar days falling on Monday through Friday, excluding Saturday and Sunday.
A year containing 366 days instead of 365, adding February 29th.
How creators, students, and professionals use Date Difference & Age Calculator
Calculating exact age for legal forms, visa filings, and passports
Finding working business days for project sprints and client deadlines
Counting down days until upcoming birthdays and personal anniversaries
Answers to common questions about Date Difference & Age Calculator
Yes, the Date Difference mode automatically tallies both total calendar days and working business days (Monday through Friday).
Calculations use native browser calendar math to accurately factor in leap years and varying month lengths.
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