Date Calculator Add or subtract days, weeks, months or years from a date

Start from any date, then add or subtract a length of time to find the resulting date — for example, 90 days from today. There's an option to count only working days, skipping weekends.

Choose a start date, then add or subtract time

Resulting date
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Day of week
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Calendar days apart
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Do this in Excel or Google Sheets

Start date in A1: 90 days later is simply =A1+90. To add working days, use =WORKDAY(A1, 90), which skips weekends. Add months with =EDATE(A1, 3).

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Adding and subtracting dates

This tool shifts a date forwards or backwards by a length of time. Adding days is the most common use — questions like "what date is 90 days from today?" or "when is 45 days from now?" come up for payment terms, notice periods, return windows and deadlines. Adding months or years keeps the same day number where possible. If you turn on working days, only Monday to Friday are counted, so a deadline of "10 working days" lands on the right business date.

Frequently asked questions

What date is 90 days from today?

Leave the start on today, set the amount to 90 days, and the resulting date appears above with the weekday it falls on.

How does "working days" differ from calendar days?

Working days skip Saturdays and Sundays, so 10 working days from a date is usually two calendar weeks later. Public holidays aren't removed, as they vary by region.

How are months handled at month-end?

Adding a month keeps the same day number where the target month has it. Adding a month to 31 January lands in early March in some browsers, so for strict month-end work, check the result.