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Our free days calculator counts the exact number of days between any two dates — instantly. Use it as a date to date calculator for project deadlines, legal timeframes, or personal milestones. Whether you need to count days for a contract, calculate how long until an event, or measure elapsed time, our day to day calculator gives you precise results in days, weeks, months, or hours. The fastest free date calculator — no sign-up required.

Calculate Date Difference

Date required · Time optional
Date required · Time optional
Years · Months · Days
Weeks · Days
Total Days
Hours · Minutes

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❓ Frequently Asked Questions

How do I count the number of days between two dates?

Enter your start date and end date using the date pickers, then select "Days" as the unit. The calculator instantly shows the exact number of days between the two dates, including or excluding the end date depending on your preference.

Can I count business days (weekdays only)?

Yes — toggle the "Exclude weekends" option to count only Monday–Friday working days between your two dates, which is useful for project timelines and payment terms.

How many weeks between two dates?

Select "Weeks" from the unit selector. The tool divides the total day count by 7 and shows both the whole weeks and any remaining days.

Does the calculator count the start date or end date?

By default the start date is included and the end date is excluded, which is the standard convention for date ranges (e.g. a 7-day week from Monday includes Mon–Sun). You can adjust this with the include/exclude toggles.

Can I calculate dates in the past?

Yes — the start date can be before or after today. If the start date is later than the end date the result will show as a negative number, telling you the end date is actually in the past relative to the start.

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