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Add or Subtract Days Calculator
Calculate a future or past date by adding or subtracting days, weeks, months, or years. Option to count or exclude weekends.
Target Date
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Add or Subtract Days from a Specific Date
Whether you are setting project deadlines, tracking medication cycles, checking invoice due dates, or planning personal milestones, this date addition and subtraction calculator makes date math effortless.
Standard calendar additions are straightforward, but counting workdays or business days is more complex. Our tool allows you to exclude weekends (Saturdays and Sundays) with a single switch, allowing you to accurately calculate working day timelines.
Frequently Asked Questions
To calculate 90 days from today, set the start date to today, keep the operation as 'Add', set days to 90, and hit calculate. The tool will output the exact date and weekday.
Yes, our calculator utilizes standard Gregorian date arithmetic, automatically accounting for leap years (e.g. 29 days in February) and varying month lengths.