Date Calculator
Add or subtract days, weeks, months, or years from any date, count business days, and measure the time between two dates — instantly, in your browser, and free.
How to use it
- Pick a start date, then choose whether to add (move later) or subtract (move earlier).
- Enter how many years, months, weeks, or days to shift by — or tap a quick-add button like 30, 60, or 90 days.
- Read the result: the exact date, its day of the week, and how many calendar and business days away it is.
- Switch to Business days to skip weekends (and U.S. federal holidays), or open the Days between tab to measure the gap between two dates.
What you can work out
Common uses include finding what date falls 30, 60, or 90 days from today, counting down the days until a birthday, holiday, or due date, working out a deadline a set number of business days away, and measuring how many days, weeks, or months lie between two dates. The calendar view marks both dates and shades the span between them so the result is easy to see at a glance.
Frequently asked questions
How do I add or subtract days from a date?
Enter a start date, choose Add or Subtract, then type the number of days (or weeks, months, or years). The resulting date appears instantly, along with the day of the week.
How do I calculate business days only?
Switch the “Count by” option to Business days. The calculator then counts forward or backward while skipping Saturdays and Sundays, and U.S. federal holidays when that option is turned on.
How many days are there between two dates?
Open the “Days between” tab and pick a From date and a To date. You’ll see the total calendar days, business days, full weeks, and months between them.
Does the date calculator account for holidays?
Yes. It can skip U.S. federal holidays when counting business days, or when moving a result off a weekend or holiday to the next working day.
What date will it be in 30, 60, or 90 days?
Enter today’s date, keep Add selected, and type 30, 60, or 90 in the Days field — or tap the quick-add buttons. The result shows the exact date and the day of the week.
Is my data saved or sent anywhere?
No. Every calculation runs entirely in your browser. Nothing you enter is stored or transmitted.