How It Works

This calculator takes today’s date and adds or subtracts the number of days you specify to find the target date. The math is straightforward:

Target Date = Today’s Date ± Number of Days

When you select business days only, the calculator skips weekends (Saturday and Sunday) and counts only Monday through Friday. This is useful for project deadlines, delivery estimates, and work-related planning. The business day calculation works like this:

Business Days = Total Days – (Number of Weekend Days in Range)

The calculator automatically handles month boundaries, leap years, and different month lengths. February gets 29 days in leap years (years divisible by 4, except century years unless divisible by 400). All the date math runs instantly in your browser with no server needed.

What if I Need to Calculate from a Different Starting Date?

This tool always calculates from today’s current date. If you need to calculate from a different starting point, you can do it in two steps. First, figure out how many days are between today and your custom start date. Then add or subtract your target number of days from that result. Most calendar apps also have date calculators that let you pick custom start dates if you need that regularly.

Does This Include Holidays?

The business days calculation only excludes weekends (Saturday and Sunday). It does not account for public holidays because holidays vary by country, region, and industry. If you need to exclude specific holidays, take the business day count from this calculator and manually subtract the holidays that fall within your date range. For example, if the result shows 20 business days and there are 2 holidays in that period, the actual working days would be 18.

Why Would I Calculate Days from Today?

People use this tool for all kinds of practical planning. Common scenarios include calculating project deadlines (what date is 45 business days from now?), tracking subscription renewals (when does my 30-day trial end?), planning events (what day is 90 days out?), checking warranty expiration dates, estimating delivery windows, and coordinating schedules across teams or time zones.

It’s also helpful for legal or contractual deadlines where you need to know exactly what date falls a specific number of days away. Instead of manually counting through a calendar and potentially making mistakes, you get the exact date instantly with the day of the week included.

What About Leap Years?

The calculator automatically handles leap years correctly. A leap year occurs every 4 years, with February getting 29 days instead of 28. However, century years (like 1900, 2100) are only leap years if they’re divisible by 400. So 2000 was a leap year, but 1900 wasn’t. This matters when calculating dates that cross February 29. The tool accounts for this automatically, so you don’t need to think about it.

Common Day Calculations

Can I Calculate Past Dates?

Yes. Just switch to “Days Ago” mode and enter the number of days you want to go backward from today. This is useful for figuring out when something happened based on elapsed time, backdating documents to a specific number of days prior, or reconstructing timelines for projects or events.

The calculator works the same way in both directions. Going backward 30 days from today is just as accurate as going forward 30 days. All date formats and business day calculations work identically whether you’re calculating into the future or the past.