Date Calculator

Add or subtract time from dates, compare two dates, and see exact date differences in days, weeks, months, and years.

Result date —
Weekday —
Difference —
Calendar phrase —

Use the date calculator to plan future dates, reverse time spans, or preview how many days and weeks separate two dates.

Date comparison

Total days —
Total weeks —
Months approx. —
Years approx. —

How to use

  • Select a start date then add or subtract days, weeks, months, or years.
  • Use the comparison tools to measure the gap between any two dates.
  • Use "Use Today" to set today's date instantly for quick planning.