Date Calculator: Add or Subtract Days
What date is 90 days from today? What was the date 6 months ago? Pick a start date, add or subtract any amount of time, and see the answer.
Your result appears here.
By Shah Rukh, software developer · Last updated:
How the date calculator works
Years and months are added first, then weeks and days. If the new month is shorter, the date is clamped to its last day. For example, 31 January plus 1 month gives 28 February (or 29 in a leap year), not 3 March.
Popular calculations
- 30, 60 and 90 days from today: payment terms, return windows and trial periods.
- 6 months from today: passport validity and probation periods.
- 40 weeks from a date: pregnancy. The due date calculator does this for you.
Need the gap between two dates instead? Use days between dates.
Frequently asked questions
What is 90 days from today?
Leave the start date as today, set days to 90 and choose Add. The date appears instantly.
How are months added?
By calendar month. If that day doesn’t exist in the new month, the last day of the month is used.
Can I subtract dates?
Yes. Choose Subtract to go back in time, for example 18 years ago.
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