Days Between Dates Calculator

Count the exact number of days, weeks, and months between any two dates.

How to use days between dates calculator

  1. Choose your start and end dates
  2. Decide whether to include the end date
  3. Read calendar days and the alternative duration units

Worked example

October 1 to October 14, 2026

13 days, or 14 with the end date included

How the result is calculated

Calendar days are counted using date-only values, not elapsed 24-hour intervals. An inclusive range adds one day. The month estimate is an average, not a count of complete calendar months.

Inputs stay in your browser. You can use this tool without joining the waitlist or creating an account.

From a calculation to a daily glance

Keep the whole month in view.

Add the relevant dates as calendar events and choose Monthly Calendar to see the interval in context.

  1. 1Add the events you want to see to your calendar.
  2. 2Enable that calendar in the app.
  3. 3Add Monthly Calendar; use Edit Widget → Design to choose its look.
Get early accessExplore widget designs

Web results do not automatically sync to the app. Setup is manual; calendar events appear through your enabled calendars.

February
SMTWTFS
1
2
3
4
5
6
7
Birthday ♡
8
9
10
11
12
13
14
MeetingsCelebration
15
16
17
18
19
20
21
CelebrationWorkshopMeetingProject reviewTeam dinner
22
23
24
25
26
27
28
Vacation
1
2
3
4
5
6
7
Monthly Calendar · example design from the app

Frequently asked questions

How do I calculate the number of days between two dates?
Pick a start date and an end date above and the calculator instantly shows the exact number of days between them, plus the same span in weeks and months. It counts calendar days, so a Monday-to-Wednesday span is 2 days.
Does the calculator include the end date?
By default it counts the gap between the two dates, so the start day is day zero. Turn on 'Include end date' to count both the start and end day, which is useful when you are counting the total length of a trip or booking.
Can I see how many days are left until a future date?
Yes. Set the start date to today and the end date to your deadline to see how many days remain. For an always-visible countdown on your iPhone, Monthly Calendar Widgets shows the days left to any event right on your Lock Screen.

More free calendar tools