Date Difference Calculator: Days Between Any Two Dates
Whether you're calculating project timelines, tracking countdowns, or determining exact durations, our date difference calculator provides comprehensive results. Get the difference in days, weeks, months, and years, plus working days with weekend exclusion. The add/subtract feature lets you find future or past dates by any number of days.
For specific time conversions, see our Time Zone Converter and Age Calculator.
Understanding Working Days
"Working days" typically means Monday through Friday, excluding weekends. Our calculator automatically counts weekend days separately, letting you toggle between total days and working days only. This is valuable for project planning, contract deadlines, and business timelines.
Add or Subtract Days
Need to know what date is 90 days from now? Or what date was 45 days ago? The add/subtract feature calculates future or past dates from any starting point. Enter your starting date, choose add or subtract, specify the number of days, and get the resulting date instantly.
FAQ
Does this account for holidays?
The free version excludes weekends only. Premium users can access holiday calendars for 50+ countries to get true business day calculations.
How accurate is the year/month calculation?
We use average month length (30.44 days) and year length (365.25 days accounting for leap years) for conversions. For exact calendar month differences, the total days shown is always precise.