DATE CALCULATOR
Calculate dates with confidence.
Find the number of days between dates or add days to a date instantly.
Date calculator
Two useful date calculations in one simple tool.
Days between dates
364 days
The end date is after the start date.
Add or subtract days
2026-10-09
Resulting date after adding 30 days.
What does a date calculator do?
It can measure the calendar-day difference between two dates and calculate a new date after adding or subtracting a number of days.
FAQ
Does it work with dates in different years?
Yes. Leap years and year boundaries are included in the day calculation.