How it works
Adds the given number of days (or business days, optionally skipping a country's public holidays) to your start date to land on the deadline date.
Deadline Calculator
Calculate a deadline a chosen number of calendar or business days from a start date.
Interactive calculator
This calculator becomes interactive when JavaScript is available. The page still provides its method, limits and related tools without JavaScript.
Result classification
Legal estimate. This is a planning estimate based on the entered dates and the rule described in the tool. It is not legal advice and cannot account for every exception or authority decision.
Limitations
Verify decisions with the relevant official authority and consider exceptions not represented by the calculator.
Frequently asked questions
What's the difference between "all days" and "business days"?
"All days" is a straight calendar count (e.g. "14 days from today"); "business days" skips your chosen weekend and, optionally, public holidays — useful for legal or contractual response windows.
Practical guide
Reviewed 27 July 2026How to use the Deadline Calculator
- Enter the known values.Use the date, time, place or duration requested above.
- Check the assumptions.Confirm time zone, weekend, inclusion and rounding choices when shown.
- Read and reuse the result.Copy, share or continue to a related tool without retyping unnecessary information.
Common uses
The Deadline Calculator is useful for anniversaries, milestones, deadlines and long-range planning.
Edge cases to check
Pay particular attention to month ends, leap days, inclusive counts and official deadline rules.