Age calculator
Calculate your exact age in years, months and days. Find out how many days until your next birthday. Free age calculator.
Time & dates
Calculator · Time & dates
Days between dates calculator
Enter two dates to find out how many calendar and working days separate them. Useful for planning holidays, contract deadlines or counting down to an event.
How we calculate days between dates
Date difference in milliseconds / 86,400,000 = total days. Working days: iterate each day and count Mon–Fri. Weekends = total − working.
Example: January 1 to December 31, 2026
From 1 Jan 2026 to 31 Dec 2026: 364 calendar days, 52 full weeks, approx. 260 working days (Mon–Fri), 104 weekend days.
Frequently asked questions
Indicative result
Calculator does not account for Polish public holidays. Actual working days may be lower.