Date Calculator
Add to or subtract from a date. Pick a start date, choose add or subtract, and enter years, months, weeks and days — or switch to business days to skip weekends. The exact result date and weekday appear instantly, with 30/60/90-day presets and an .ics export to drop it into your calendar.
Wednesday, April 1, 2026
Wednesday · 90 calendar days after the start · day 91 of 2026
Business-days mode skips Saturdays and Sundays. Need the span between two known dates instead? Use the days-between calculator. How we calculate →
Add or subtract days, weeks, months and years from a date
Pick a start date, choose Add or Subtract, and enter any mix of years, months, weeks and days. The result — the exact date and the day of the week it lands on — appears instantly. Calendar math handles month lengths and leap years for you: adding one month to January 31 lands on the last valid day of February, not an impossible date.
This is the forward/backward question (“what date is X from this date?”). If instead you know two dates and want the span between them, use the separate days-between calculator.
Add or subtract business days (skip weekends)
Switch to business-days mode and the calculator counts only Monday–Friday, stepping over Saturdays and Sundays — the right way to project a deadline like “net-10 business days” or a processing window. No major competitor offers calendar add and business-day add in the same visible tool; here it's a single toggle. (Federal holidays vary by year; business-day mode currently excludes weekends, and we note holidays separately.)
What day of the week will your result land on?
Scheduling usually hinges on the weekday, not just the date — a deadline that falls on a Saturday effectively moves. The result panel always names the weekday and flags weekends, so you can see immediately whether your “90 days from today” lands on a workday. Most add/subtract tools bury or omit the weekday; we lead with it.
Common examples: 30, 60 and 90 days from today
Warranty windows, return policies, free trials and legal notices are usually counted in plain calendar days from today. Use the quick 30 / 60 / 90 days buttons to jump straight to those, then copy the result, share a link, or export an .ics file to drop the date straight into your calendar — a feature none of the leading date tools provide.
Frequently asked questions
What date is 30 days from today?
Set the start date to today, choose Add, enter 30 days, and the calculator returns the exact date plus its weekday. It counts calendar days (including weekends); switch to business-days mode if you need to skip Saturdays and Sundays.
What date is 90 days from today?
Use the “90 days from today” quick button (or enter 90 days, Add). You'll get the precise date and day of the week — handy for return windows and 90-day notice periods. Export it as an .ics to add a reminder to your calendar.
How do I subtract days from a date?
Choose Subtract, pick the start date, and enter the number of days, weeks, months or years to go backward — the calculator returns the earlier date and its weekday instantly. Useful for “when did the 45-day clock start?” type questions.
How do you calculate business days from a date?
Switch the mode to business days and enter the count; the tool steps forward (or back) over weekends, landing on a Monday–Friday result. This matches “net X business days” terms used for payments and processing.
What day of the week will the result fall on?
The calculator always shows the weekday of the computed date and flags weekends, so you can tell at a glance whether a deadline lands on a working day or needs to shift to the next business day.
What's the difference between this and a days-between calculator?
This tool adds or subtracts a duration from one date to find a new date. A days-between calculator does the opposite — it counts the span between two dates you already know. For that, use Calcuris's days-between calculator.
Researched & verified by the Calcuris Data & Research Team. How we build and check our tools →