Days Between Dates
Count the exact number of days between any two dates. See the breakdown in calendar days, business days, weeks, months, hours, and minutes.
Days Between Dates
Calculate the exact duration between any two dates
How to Calculate Days Between Two Dates
To find the number of days between two dates, subtract the earlier date from the later date. The formula is:
For example, from January 1 to March 31 is 89 days (in a non-leap year).
Calendar Days vs. Business Days
Calendar days include all days: Monday through Sunday. This is the standard way to count days between dates for personal, legal, and most business uses.
Business days count only weekdays (Monday–Friday). Use business days for work deadlines, payment terms, and shipping estimates.
Common Use Cases
- Contract deadlines — Count days remaining before a contract expires
- Project planning — Find the duration of a project phase
- Age verification — Check how old someone is in days
- Shipping estimates — Calculate delivery windows
- Event planning — How many days until a wedding, vacation, or deadline
Days in Each Month (Reference)
| Month | Days (Regular Year) | Days (Leap Year) |
|---|---|---|
| January | 31 | 31 |
| February | 28 | 29 |
| March | 31 | 31 |
| April | 30 | 30 |
| May | 31 | 31 |
| June | 30 | 30 |
| July | 31 | 31 |
| August | 31 | 31 |
| September | 30 | 30 |
| October | 31 | 31 |
| November | 30 | 30 |
| December | 31 | 31 |
? Frequently Asked Questions
How do I calculate days between two dates?
Does it matter which date I enter first?
How do I calculate business days between two dates?
Can I calculate the number of weeks between two dates?
Does the calculator count the start date?
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💡 Pro Tip
Need to count only working days? The result includes business days (Mon–Fri) automatically. For deadline tracking use 'business days.'