Date Calculator
Find the number of days between two dates, or add / subtract days, weeks and months from any date. Works with past and future dates.
Days between two dates
Add or subtract from a date
About this tool
This date calculator answers the two date questions people ask most: how many days are between two dates, and what date is N days away from another date. Both forms accept past and future dates.
Use it for billing cycles, project deadlines, travel itineraries, countdowns, warranty windows, pregnancy milestones and invoice due dates — anywhere a precise day count matters.
FAQ
How many days are between two dates?
Count all calendar days excluding the start date and including the end date. This calculator subtracts the two dates and reports the rounded total.
What if I need business days only?
Subtract weekends and public holidays from the total manually — a common approach for deadlines and invoices.
How do I add 30 days to a date?
Use the second form: pick the start date and enter 30. Leap years and month lengths are handled automatically.