Date Difference Calculator
Use it for notice periods, project timelines, rent periods and interest calculations.
Private: your numbers stay on your device.Calculated in your browser. The amounts you enter are never sent to us or stored.
Quick answer
The number of days between two dates is the end date minus the start date. Add 1 if you want to count both the start and end days. Working days exclude weekends.
How to use the Date Difference Calculator
- Enter the start and end dates.
- Choose whether to include the end date.
- Choose the working week (5 or 6 days).
- Read total days, weeks, months and working days.
Worked example
1 Jan 2026 to 31 Mar 2026: 89 days (90 including the end date), 64 working days (Mon–Fri, including end date; public holidays not excluded).
Formula
Days = End − Start (+1 if inclusive)
Frequently asked questions
Are public holidays excluded?
No, holidays differ by state and employer. Subtract them manually.
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