Date Difference Calculator

Calculate days, weeks, and time between two dates for deadlines, trips, projects, billing periods, and planning.

Open Date Difference Calculator

Planning uses

Date differences help with project timelines, rental periods, travel countdowns, subscription windows, school assignments, billing cycles, and event planning.

Inclusive vs. exclusive counts

Some tasks count both the start and end date, while others count elapsed days between them. Confirm the rule before using the number for contracts or deadlines.

Calendar cautions

Weekends, holidays, time zones, and business-day rules can change a deadline. This calculator is a general calendar helper unless a specific workflow states otherwise.

Recordkeeping

When a date count affects money or legal obligations, save the original dates and the rule used to count them.

How to use it

1. Enter the start date and end date.
2. Review the day and week difference.
3. Adjust manually if your situation requires inclusive dates, business days, or holiday rules.

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