Date Difference Calculator – Days, Weeks & Months Between Dates
Find the exact difference between any two dates: full years, months and days, plus total days, weeks and working-day options.
About Date Difference Calculator
The date difference calculator finds the exact gap between any two dates: full years, months and days, plus total days and total weeks. Use it for project deadlines, pregnancy due dates, countdowns, visa days or how many days until questions. Instant and accurate.
📖 The Full Guide
Count days between any two dates for deadlines, countdowns, due dates and contracts — with Excel formulas and an instant calculator.
Read the article →📅 Date Difference Calculator
History
How to Use
Pick the start date.
Pick the end date.
Click Calculate.
See years, months, days, total days and weeks.
Frequently Asked Questions
The calculator subtracts the start date from the end date and reports both the calendar breakdown (years/months/days) and the exact total number of days.
Yes, the total counts every calendar day from the start date up to and including the end date.
Yes — put today as the start date and the event date as the end date to see exactly how many days remain.
Use =DAYS(end, start) or =DATEDIF(start, end, "D"). Our online calculator gives the same result without any software.
Divide the total days by 7. Our calculator shows both total days and full weeks automatically.
The Formula
The difference is broken into full years, months and days, then converted to total days and total weeks for convenience.