Age & DatesDATE & AGE TOOL
Days Between Dates
Calculate the number of calendar days between two dates.
How this calculator works
This tool uses calendar dates directly. Date differences are calculated from UTC-normalized calendar dates to avoid daylight-saving-time changes affecting the result. Calendar age counts complete months from the starting date, then remaining days. When a month is shorter, the date is clamped to its last day. For this tool, a 29 February birthday is observed on 28 February in a non-leap year. These are calculation conventions, not legal eligibility rules.
Why use this tool?
It is designed for quick, transparent calculations without requiring an account. Your date inputs are processed in your browser by the current version of the site.
Frequently asked questions
Does this calculator account for leap years?
Yes. Calendar calculations use the actual dates in the Gregorian calendar, including leap years.
Do you store my date of birth?
The calculator processes dates locally in your browser. We do not send the entered dates as analytics events. See our privacy information for site analytics details.
Keep exploring
How many days are between two dates?
Enter the two dates in either order. By default the result is the elapsed calendar-day difference: identical dates give zero. Select the inclusive option to count both endpoints, adding one day. Weekends and holidays are included.
Worked example
1 January 2026 to 8 January 2026 is 7 elapsed days, or 8 days when both endpoints are included.