Days between dates
0
Free · Instant · No signup
Date Difference Calculator
Days between two dates.
Date Difference Calculator
Date difference calculator
Date difference
Weeks (approx)
0
Direction
Same day
Signed days
0
Day count for contracts, PTO, and sprint math
Rent proration, trial periods, and "90 days until renewal" start with a day count. Defaults: Jan 1, 2026 to Sep 2, 2026 shows the live span on load.
Cards: absolute days (headline), approximate weeks, direction text, signed days for countdowns.
Copy exports start, end, days, signed days, and weeks.
Age vs span vs time zones
Age since birth with year/month/day breakdown is the Age Calculator. This page is two arbitrary dates.
Same calendar day across offices may differ in clock time. After you know the date delta, convert meeting times with the Time Zone Converter.
Percent of a period completed (day 30 of 90) uses the Percentage Calculator on the two numbers.
Business days need a different tool
Weekends and holidays are included in the day count here. SLA business-day math needs a holiday calendar spreadsheet.
Signed negative days mean the end date is before the start. Flip inputs if you only want a positive countdown.
Cron jobs scheduled daily may reference the Cron Expression Generator separately from this span.
Frequently Asked Questions (FAQ)
How are days between dates computed?
Absolute difference in calendar days at UTC midnight. Signed days = end minus start (negative if end is before start). Weeks = days / 7 to one decimal.
Does order matter?
Absolute day count is the same either way. Signed days and direction label show whether end is after or before start.
Are partial days counted?
No time-of-day. Jan 1 to Jan 2 is 1 day regardless of clock time on each date input.
What date range is valid?
Any valid HTML date input values. Invalid or empty fields show alert and disable copy.