Add days to a date — or count down to a deadline.
Frequently Asked Questions
Deadline Calculator helps you calculate target dates by adding days or business days to a start date, or find how many days remain until a deadline.
Business days are weekdays from Monday to Friday. When calculating with business days, weekends (Saturday and Sunday) are skipped.
No, the calculator only skips weekends when counting business days. It does not account for public holidays, which vary by country and region.
When "include start date" is on, the start day counts as day 1. When "include end date" is on, the end date is included in the count. This affects the total by one day.
Yes! Click "Copy link" to copy a URL with your settings encoded. Anyone opening that link will see your exact calculation.
Different tools may include or exclude the start/end date differently. Use the include toggles to match your preferred counting method.
Yes, the calculator correctly handles leap years and varying month lengths using JavaScript's built-in Date object.
The calculator uses your browser's local timezone. All dates are treated as local dates at midnight.