Date Calculator
Calculate duration or add days to a date.
Yrs
Mos
Day
Use negative numbers (e.g. -30) to subtract.
Duration Between Dates
0 Days
0 Years, 0 Months, 0 Days
Total Weeks
0
Total Days
0
Resulting Date
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Calculated by adding the specified duration to the start date.
How Date Calculations Work
Calculating time isn't as simple as math because months have different days (28, 30, 31) and leap years exist. Our tool handles all Gregorian calendar rules for you.
Difference Calculator
Finds the exact count of years, months, and days between two dates. Useful for age calculation, project timelines, or relationship anniversaries.
Adding Days to Date
This feature is incredibly useful for planning schedules, project deadlines, or travel.
- Example 1: "What is the date 90 days from now?" (Visa rules)
- Example 2: "When is my 1000th day anniversary?"