Date Calculator & Days Between Dates Tool
Free online date calculator. Calculate the difference between two dates in years, months, weeks, and days. Add or subtract days, weeks, months, or years from any date. No upload required.
Days Between Two Dates
Result
Year
-
Mon
-
Week
-
Day
-
Add or Subtract from a Date
Result Date
-
-
About Date Calculations
How to Calculate Days Between Dates?
Calculating the difference between two dates involves determining the total number of days, then converting to larger units. For example, 365 days equals 1 year (non-leap year), 30.44 days approximately equals 1 month, and 7 days equals 1 week. This tool performs accurate calculations accounting for varying month lengths and leap years.
Common Use Cases
Date calculations are essential for project planning, age calculation, contract duration tracking, pregnancy due date estimation, and event countdown timers. Whether you need to know how many days until a deadline or calculate the exact duration between two events, this tool provides instant results.
Leap Year Considerations
A leap year occurs every 4 years (with exceptions for century years not divisible by 400), adding February 29th. This tool automatically accounts for leap years when calculating date differences and performing date arithmetic, ensuring accurate results regardless of the date range.
Quick Reference
| Duration | Days |
|---|---|
| 1 Week | 7 |
| 2 Weeks | 14 |
| 1 Mon | ~30 |
| 3 Mons | ~90 |
| 6 Mons | ~182 |
| 1 Year | 365 |
| 1 Year (leap) | 366 |