Days Between Dates Calculator

This days between dates calculator gives you the exact number of days between two dates the moment you pick them — plus the same gap in business days, weeks, and calendar months.

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Standard clock & calendar math. For payroll, verify against your employer's rounding policy.

How days between dates are counted

The calculator counts the midnights between your two dates — the standard difference, so January 1 to January 2 is 1 day. The weekday count uses the same convention, counting only Mondays through Fridays in that span. The table then re-expresses the exact same gap as weeks + days, whole calendar months, and calendar-accurate years, months and days.

Worked example: Monday, March 2 to Monday, March 16, 2026

Both dates are Mondays two weeks apart. Counting midnight-to-midnight gives 14 days (start excluded, end included). Because the span covers two full working weeks, that is 10 weekdays (business days), which the calculator also equals 2 weeks, 0 days. If you instead needed both endpoints counted — inclusive counting, e.g. "how many days am I on holiday from the 2nd through the 16th" — you would add 1, giving 15 days.

Common date gaps at a glance

Example gap	Days	Weeks + days	Business days
One calendar week (Jun 15 → Jun 22, 2026)	7	1 wk 0 d	5
Feb 14 → Mar 14, 2026	28	4 wk 0 d	20
Jan 1 → Mar 1, 2026	59	8 wk 3 d	41
A full year (Jan 1 → Dec 31, 2026)	364	52 wk 0 d	260

Business-days figures count Monday–Friday only and do not remove public holidays, which vary by country. Calendar days include weekends. February spans 28 days in 2026 and 29 in a leap year such as 2024, so a Feb-to-Feb gap shifts by one day across a leap year.