Date Difference Calculator
Days, weeks, months and business days between two dates.
Enter your values
ⓘ Live results
Results
- Total days
- 358
- Weeks and days
- 51 weeks, 1 days
- Whole months
- 11
- Years and months
- 0 years, 11 months
- Working days
- 257
- Hours
- 8,592
Quick answer
Subtract the earlier date from the later one; the difference in milliseconds divided by 86,400,000 gives whole days.
How to use the Date Difference Calculator
- 1Enter the start date.
- 2Enter the end date.
- 3Read the gap in days, weeks, months and working days.
Worked example
Using the values the calculator loads with:
Inputs
- Start date2026-01-01 YYYY-MM-DD
- End date2026-12-25 YYYY-MM-DD
Results
- Total days358
- Weeks and days51 weeks, 1 days
- Whole months11
- Years and months0 years, 11 months
- Working days257
- Hours8,592
Frequently asked questions
Are both dates included?
The day count is exclusive of the start date; working days are counted inclusively so a Monday-to-Friday week shows 5.
Why don't months divide evenly?
Months are 28–31 days long, so calendar months are counted by the calendar, not by dividing days by 30.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.