Date Difference Calculator
Calculate the exact number of days, weeks, months or business days between any two dates, or add and subtract time from a starting date.
Results
Whether you need to count how many days until a deadline, figure out the number of business days for a shipping estimate, calculate weeks between dates for a pregnancy tracker, or find a future date by adding 90 days to today - these calculators handle all date arithmetic instantly. Every tool accounts for leap years, varying month lengths and weekend exclusions where needed.
Frequently asked questions
Enter both dates in the Days Between Dates calculator above. It instantly shows the total count in days, weeks and months, accounting for leap years and varying month lengths. No manual counting required.
Use the Business Days Calculator which excludes weekends (Saturday and Sunday). A typical month has 20-23 business days. Note that public holidays are not excluded since they vary by country.
Use the Add or Subtract Days tool. Enter today's date, set the amount to 30 and the unit to days. The tool shows the exact result date and the day of the week it falls on.
A full-term pregnancy is about 40 weeks (280 days). Enter your due date or last menstrual period date in the Weeks Between Dates calculator to track progress in exact weeks and days.
Yes. The Months Between Dates calculator shows both whole months and a decimal value. A standard 12-month lease from January 1 to December 31 counts as exactly 12 months. Partial months are shown as decimals.
All date difference tools
Need other tools? Explore our recipe scaling calculator, pan size converter, ingredient substitution calculator, cooking time converter and ingredient weight calculator, or browse our length converter, weight converter and temperature converter.