DATE & TIME
Date Calculator
Add or subtract days, months and years from a date.
100% free
No sign-up
Private — runs in your browser
Instant results
KEY TAKEAWAYS
- Add or subtract days, months and years from a date.
- Free to use — no sign-up, no account and no usage limits.
- Runs entirely in your browser, so the numbers you enter stay private.
- Works on desktop and mobile with instant, accurate results.
Last updated: June 2026
About the Date Calculator
Choose a start date, then add or subtract a number of years, months and days to find the resulting date and weekday.
Frequently asked questions
Does it handle month-end correctly?
Yes — it uses calendar arithmetic, so adding a month to Jan 31 lands sensibly in the next month.
Free online tool from ConvertFleet. Calculations run entirely in your browser — nothing you type is sent anywhere. Results are estimates for general guidance only.