8 tools
Use free date calculators to find exact age, days, weeks, months, and years between dates, compare ages, calculate durations, or count down to events.
Calculate your exact age in years, months, and days, plus total weeks, hours, seconds, next birthday, leap days, and age milestones.
Compare two birthdays to find who is older, the exact age gap in years, months, and days, plus total days, hours, seconds, and midpoint.
Count days between two dates, include or exclude endpoints, add or subtract days, and calculate business-day offsets with optional U.S. holidays.
Calculate weeks between two dates or add and subtract weeks. See complete weeks, leftover days, weekdays, weekends, and exact date results.
Calculate complete months between dates or add and subtract months with transparent month-end handling, remainder days, and elapsed-day totals.
Calculate complete years between two dates or add and subtract years. See months, days, leap days, decimal years, and anniversary adjustments.
Calculate the duration between two dates in years, months, days, weeks, hours, minutes, and seconds, with optional local times and workday context.
Calculate the time until or since any event in days, hours, minutes, and seconds. Name the event, set local times, and optionally track progress.
Use Age Calculator for one person's age, Age Difference for two birth dates, and Date Duration for a calendar span in years, months, and days. Days, Weeks, Months, and Years calculators also add or subtract their named units.
Use Countdown for one event date. For deadlines, confirm whether the rule counts both endpoints, uses business days, or depends on a timezone.