Days Between Dates Calculator
Use this free days between dates calculator to find the exact number of days between any two dates. Perfect for deadlines, countdowns, event planning, contract periods, and more.
📅 Days Between Dates Calculator
How to Use the Days Between Dates Calculator
- Enter your start date
- Enter your end date
- Click Calculate to see the exact number of days between the two dates
Common Uses for the Days Between Dates Calculator
- Project deadlines: Find out how many working or calendar days remain
- Age milestones: How many days until your birthday or anniversary?
- Legal and financial: Calculate notice periods, contract durations, or payment terms
- Travel planning: Count the days between your departure and return dates
- Health tracking: Measure how long since a medical procedure or medication start
- Pregnancy: Count days since conception or last period
Days Between Common Date Ranges
| Period | Approximate Days |
|---|---|
| 1 week | 7 days |
| 1 month | 28–31 days |
| 3 months (1 quarter) | 90–92 days |
| 6 months | 181–184 days |
| 1 year | 365 days (366 in a leap year) |
| 2 years | 730–731 days |
Days Between Dates FAQ
Does this calculator include or exclude the end date?
By default, the calculator counts the total number of days between the two dates, not including the end date. For example, from 1 May to 10 May = 9 days.
How do I count only working days?
To count working days (Monday–Friday), divide the total calendar days by 7, multiply by 5, and adjust for any public holidays that fall within the period.
Can I calculate days between dates in different years?
Yes — this calculator works for any two dates regardless of how far apart they are, automatically accounting for leap years and varying month lengths.
How the day count is calculated
The calculator compares two calendar dates and reports the elapsed number of days. In the standard result, the start date is day zero and the end date is not counted as a complete extra day. That is why 1 May to 10 May gives 9 elapsed days. If your deadline, booking or policy counts both boundary dates, add one day to the result.
Leap days and different month lengths are handled automatically. For example, 28 February 2028 to 1 March 2028 is two elapsed days because 2028 includes 29 February. The tool uses calendar dates rather than clock times, so daylight-saving changes do not add or remove a day.
Working days, holidays and deadlines
A calendar-day result includes weekends. Do not estimate working days by multiplying weeks by five when accuracy matters: partial weeks and public holidays can change the answer. For legal, visa, tax, employment or contract deadlines, check whether the rule says calendar days, business days or inclusive days, and confirm the official deadline with the responsible organisation.
Tested examples and review
- 1 January 2026 to 2 January 2026 = 1 elapsed day.
- 31 December 2025 to 1 January 2026 = 1 elapsed day.
- 28 February 2028 to 1 March 2028 = 2 elapsed days.
Last reviewed and test-checked on 19 August 2026 by Badar Ashfaq. See our editorial policy and calculator testing method.
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