Age Calculator

Files360 Age Calculator is a precision tool for calculating exact age from date of birth. While knowing your age in years is simple, many situations require more specific information — exact months and days for official documents, total days for medical calculations, and precise age breakdowns for eligibility verification.

The calculator uses proper calendar math that accounts for varying month lengths (28, 29, 30, or 31 days), leap years, and calendar transitions. This produces results accurate to the exact day, unlike simple year-based calculations that can be off by weeks or months.

Common use cases include filling official forms (government applications, insurance, bank accounts), age eligibility verification (voting, driving, competitions), medical age calculations (pediatric milestones, age-specific treatments), and personal milestones (10,000th day alive, half-birthday).

The custom target date feature adds versatility — calculate your age at any point in time. What was your age when you graduated? How old will you be when your passport expires? These questions are answered instantly. The tool runs entirely offline in your browser with no internet connection required.