USEFUL TOOLS. LESS HASSLE.Years, Months and Days
The exact calendar gap in familiar units.
CALCULATOR / DATES
Free Date Difference Calculator
Find the number of days, weeks, months and years between two dates. Count business days, include the end date and see the exact years, months and days.
Uses calendar dates only, so there are no time-zone or daylight-saving surprises.
✓ Free to use · No signup required · Processed in your browser
Date Difference Calculator workspace
PICK TWO DATES · CALCULATE · SEE THE DIFFERENCE
Pick a start date and an end date.
Total days—
Weeks—
Business days—
Weekend days—
Hours—
Months (total)—
Business days count Monday to Friday and do not remove public holidays. Calendar dates only — no time zones involved.
DATE DIFFERENCE WORKSPACEMOSANKIT / CALCULATORS
THE BASICS
What Does a Date Difference Calculator Do?
A date difference calculator tells you how much time lies between two calendar dates — for example how many days until a deadline, how long a project ran, or how many days since an event.
It shows the result several ways: as years, months and days; as total days and weeks; and as business days (Monday to Friday), which is handy for deadlines and delivery estimates.
BUILT FOR THE JOB
Key Features of MoSanKit Date Difference Calculator
Total Days and Weeks
Total days, whole weeks plus remaining days, and hours.
Business Days
Weekdays and weekend days counted separately.
Include the End Date
Count the final day too, for inclusive ranges.
Swap and Today
Reverse the dates or use today as the end date in one click.
Private by Design
Everything runs in your browser.
QUICK AND SIMPLE
How to Find the Difference Between Two Dates
01 / START
Pick a start date
The earlier date.
02 / END
Pick an end date
The later date, or use today.
03 / OPTIONS
Include the end date?
Tick it to count the final day as well.
04 / READ
Read the result
Years, months, days and business days.
MADE FOR EVERYDAY WORK
Who Can Use This Tool?
Project ManagersMeasure durations and deadlines.
HR TeamsCalculate notice periods and tenure.
StudentsCount days until exams and due dates.
Event PlannersSee how long until an event.
TravellersCount the nights of a trip.
Anyone CuriousFind out how many days since or until a date.
GOOD TO KNOW
A few things, answered.
Quick answers about using the MoSanKit Date Difference Calculator.
By default the end date is not counted, so Monday to Friday is 4 days. Tick "Include the end date" to count both, giving 5 days.
Weekdays from Monday to Friday. Public holidays are not removed because they differ by country and year.
Whole calendar months are counted first (31 January + 1 month is the last day of February), then the leftover days are shown.
Yes. If the first date is later, the calculator swaps them and tells you.
Yes. All calculations use the real calendar, including 29 February.
No. Everything is calculated in your browser.
KEEP BUILDING
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