Calendar days
The difference calculator excludes the start date and includes the end date, matching the most common way elapsed time is counted.
Free date & workday calculator
Make every
date count.
Find the distance between dates, count business days, or land on a future deadline—in seconds, without a spreadsheet.
Start calculating01 / Pick a calculatorResults update instantly
DATE DIFFERENCE
How far apart are two dates?
TOTAL TIME BETWEEN
31calendar days
Business days23
In weeks4.4
End dateFriday, October 16
Counts the time after the start date through the end date. Business days exclude Saturdays and Sundays.
02 / Count with confidenceClear rules, transparent results
The simple version
Date math shouldn't feel like math.
DayCountLab handles the awkward parts—different month lengths, leap years, and weekends—so you can plan with a result you understand.
Business days
Workdays mean Monday through Friday. Weekends are skipped; location-specific public holidays are not.
Private by default
Every calculation happens in your browser. Dates are not submitted, stored, or tied to an account.
Leap-year aware
Calculations use real calendar dates, so February 29 and varying month lengths are handled automatically.
03 / Made for real plansOne tool, dozens of deadlines
PROJECT PLANNING
Turn “three weeks” into an actual date.
Invoices & contracts
Calculate net-30 due dates or check exactly how long an agreement has run.
Trips & events
Count the days until departure, a wedding, a launch, or any important date.
Applications
Find a filing deadline while excluding weekends from the working-day count.
Questions, answered
Small details that make a big difference.
Does the date difference include both dates?
DayCountLab excludes the start date and includes the end date. For example, Monday to Tuesday is one day. This is the standard elapsed-time convention.
Are public holidays removed from business days?
No. Holiday calendars vary across countries, regions, and companies. DayCountLab removes Saturdays and Sundays only, then clearly labels that rule beside the result.
Can I count backward from a date?
Yes. Enter a negative number in the workday counter, or choose “Subtract time” in the date math calculator.
Is this calculator free?
Yes. All four calculators are free to use, with no account, download, or usage limit.