Date & Time
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Compare two dates, add or subtract time, and count business days in one place.
Calculate dates
Switch between date difference, add or subtract date, and business days using one calculator.
Measure the gap between two dates
Review the exact date span in calendar terms and total elapsed days.
Useful when you need an inclusive date span for planning or eligibility checks.
Compare two dates and review both calendar and total day differences.
Date result
Review the calculated dates, totals, and supporting details for the selected mode.
Select dates to see the result.
Choose a mode, enter the required dates, and click Calculate.
How to use this date calculator
- Choose Date Difference to measure the gap between a start date and end date.
- Choose Add / Subtract Date to move forward or backward by years, months, weeks, and days.
- Choose Business Days to count weekdays in a date range and optionally exclude weekends.
- Use Today in any date field when you want to start from the current local date.
Examples
- Count the total days between March 1, 2026 and March 31, 2026.
- Add 90 days to a contract start date to find the review deadline.
- Calculate business days between two project dates while excluding weekends.
What can this date calculator do?
This date calculator lets you compare two dates, add or subtract time from a starting date, and count business days while excluding weekends when needed.
It combines three common scheduling tasks into one page, which makes it useful for planning deadlines, comparing timelines, estimating project durations, and checking weekday-based schedules without switching between multiple tools.
Date calculator FAQs
Can I calculate the difference between two dates?
Yes. Date Difference mode shows the total day count plus a calendar breakdown in years, months, and days.
Can I add or subtract months from a date?
Yes. Add / Subtract Date mode supports years, months, weeks, and days from a selected start date.
Does the business days mode exclude weekends?
Yes. The first version supports excluding Saturdays and Sundays when Exclude weekends is enabled.