Date Calculator
Add or subtract years, months, weeks and days from any date to find a future or past date.
Result Date
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What Is the Date Calculator?
The Date Calculator adds or subtracts a span of years, months, weeks and days to or from a starting date and shows the resulting date, including the day of the week. It uses real calendar math, so leap years and varying month lengths are handled. Runs in your browser.
How It Works
Pick a start date, choose Add or Subtract, and enter any combination of years, months, weeks and days. The resulting date updates instantly.
When to Use It
Use it to find deadlines, due dates, anniversaries, warranty or contract end dates, or any 'what date is X from this date' question.
Frequently Asked Questions
- How are months handled?
- Months are added by calendar, so 31 Jan + 1 month lands in February and clamps to the last valid day, matching how most calendars behave.
Last reviewed: 2026-06-27
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