Pick your two dates
Pick a start date and an end date using the date fields.
CALCULATORS · FREE ONLINE TOOL
Date Difference Calculator
Count the days, weeks and business days between two dates"About three months" is fine at dinner and terrible on a contract. When a deadline, notice period, warranty window or visa countdown depends on the exact days, this calculator returns the precise gap between any two dates.
// DATE DIFFERENCE CALCULATOR · GET STARTED
Use Date Difference Calculator
Count the days, weeks and business days between two dates
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Use this when both the first and last day should count, such as the full length of an event.
Difference between the dates
7 days
| Measure | Result |
|---|---|
| Total days | 7 |
| Weeks and extra days | 1 weeks and 0 days |
| Calendar breakdown | 0 years, 0 months, 7 days |
| Business days (Mon to Fri) | 5 |
| Total hours | 168 |
Business days exclude Saturdays and Sundays only. Public holidays are not deducted, because they differ by country and region.
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How to use the Date Difference Calculator
Choose how to count
Tick include the end date if both the first and last day should be counted.
See the full breakdown
Read the total days, weeks, calendar breakdown, business days and total hours.
// DATE DIFFERENCE CALCULATOR · ABOUT THIS TOOL
About the Date Difference Calculator
Counting days between dates sounds simple until months of different lengths, leap years and weekends get involved. This calculator counts on the real calendar, so February and leap years are handled exactly as they fall.
You get the total days, a years-months-days breakdown, business days without weekends, and total hours.
Where it helps most
Date math you can defend.
Notice periods
HR teams measure probation periods and service anniversaries, where being off by one day can cost real money on a contract.
Tenancy timelines
Landlords and tenants pin down notice windows and deposit timelines exactly, ending arguments about whether February 'counts' in a span.
Project deadlines
Measure how long a project phase lasted, or land the exact date a 'deliver in 45 days' clause falls on, with leap years handled.
Event countdowns
Event organizers count down to weddings, conferences and product launches, while travelers figure out trip lengths and visa stay limits.
Using it well
Both directions covered.
Count backward
Drop in a start date and an end date to measure how long something lasted: a project phase, a subscription, a tenancy.
Count forward
Start from today and add a number of days to land the exact date a deadline or notice period falls on.
Leap years handled
Month lengths, year boundaries and leap years are all handled behind the scenes, exactly where manual counting always goes wrong.
Date Difference Calculator: built for trust
Total days first, then the same span in weeks, months and years. Exact, instant, and boring in the best possible way.
Date Difference Calculator FAQs
Enter the start and end dates and the tool returns the exact day count, accounting for different month lengths and leap years. You also get the same span expressed in weeks, months and years for easier reading.
