Need to know the exact date 90 days from now? Or perhaps you need to calculate a deadline that is 3 weeks and 2 days away? Our Date Calculator makes date math simple.
Easily add or subtract years, months, and days from any starting date to find your target. Perfect for tracking visa expirations, pregnancy milestones, or project deadlines without looking at a calendar.
Yes. Our calculator uses the standard Gregorian calendar logic.
If you add 1 year to February 29th (in a leap year), it correctly adjusts to the non-leap year equivalent.
It handles the variable number of days in months automatically (e.g., adding 1 month to January 31st).
Finding past dates.
It is useful for finding out “What date was it 45 days ago?” or calculating backwards from a deadline.
For example, if a project is due on December 1st and you need 10 days for review, subtract 10 days to find your submission deadline.
It includes all calendar days.
This tool calculates based on raw calendar days, meaning it counts Saturdays and Sundays.
It does not exclude weekends or public holidays. The result shows the day of the week (e.g., “Monday”) so you can check if your deadline falls on a weekend.
Absolutely. Many travel visas have strict limits, like the “90 days in 180 days” rule for the Schengen Area.
By entering your entry date and adding 90 days, you can find the exact date you must leave the country to avoid overstaying penalties.
1. Mixed Duration Math:
Most tools only let you add days. We let you mix units. You can calculate “1 Year, 3 Months, and 15 Days” in a single go. This saves you from having to do three separate calculations and helps with complex timelines.
2. Weekday Display:
Knowing the date is half the battle; knowing the day is the rest. Our result box prominently displays the day of the week (e.g., Friday) so you instantly know if your target date is a business day or a weekend.
3. Local Browser Privacy:
Your plans are private. Whether you are calculating pregnancy due dates or legal contract expirations, the calculation happens 100% on your device. We do not track or store the dates you input.
💡 Pro Tip: Calculating a 90-day warranty or return window? Don’t just add “3 months”, as months have different lengths (28-31 days). Always use the “Days” field (add 90 days) for legal accuracy!