Calculate Your Due Date
Enter a start date and duration to find your exact deadline.
How the Due Date Calculator Works
Simple steps to find your project deadline.
Set Start Date
Pick the project start date or the date when your countdown begins.
Enter Duration
Type the number and select the unit: calendar days, business days, weeks, or months.
Calculate
Click "Calculate Due Date" to compute. Business days skip weekends automatically.
View Due Date
See the exact due date, day of week, and whether it falls on a weekend.
What Is a Due Date Calculator?
Understanding deadline calculation for projects.
Due date calculation
A Due Date Calculator computes the exact date when a task, project, or deliverable is due. You provide a starting point and a duration, and it tells you the precise deadline.
The distinction between calendar days and business days is crucial. A "10 business day" deadline takes 14 calendar days (2 weeks) since weekends are skipped.
Business days counting
Business days (weekdays) are Monday through Friday. When counting business days, the calculator advances one day at a time, skipping Saturdays and Sundays. This is the standard for corporate deadlines, bank processing times, and many legal requirements.
Month-based deadlines
Adding months uses calendar logic. Adding 1 month to January 31 gives February 28 (or 29). Adding 1 month to March 15 gives April 15. The calculator handles all month-length variations correctly.
When to Use a Due Date Calculator
Common deadline planning scenarios.
Project Management
Set milestone dates and sprint deadlines. Calculate when each phase should end based on estimated duration.
Assignment Deadlines
Students can calculate when homework and papers are due based on the assignment date and allowed completion time.
Legal Filing
Calculate court filing deadlines and response dates. Many legal deadlines are specified in business days.
Construction
Estimate completion dates for construction phases. Track material delivery and subcontractor schedules.
Creative Projects
Set content creation deadlines for articles, videos, and design work. Plan editorial calendars precisely.
Business Contracts
Calculate contract delivery dates and payment due dates. Ensure compliance with agreed timelines.
Due Date Examples
Common deadline calculations.
30-day project
Started June 1 → Due July 1. 30 calendar days, approximately 22 business days.
2-week sprint
Started Monday → Due 2 Fridays later. 10 business days = 14 calendar days.
90-day milestone
Q1 start Jan 1 → Due April 1. Standard quarterly milestone.
Frequently Asked Questions
Common questions about the Due Date Calculator.
Enter a start date and add the number of days, weeks, or months until the deadline. The calculator shows the exact due date, including the day of the week and whether it falls on a weekend.
Yes. Toggle the "Business Days Only" option to skip weekends. Adding 10 business days will skip Saturdays and Sundays, giving you a due date that falls on a weekday.
The calculator handles weekends but not public holidays, as these vary by country and region. For holiday-adjusted deadlines, add extra days to account for your local holidays.
Calculate each milestone separately by changing the duration. For example, Phase 1 (30 days), Phase 2 (45 days from Phase 1 end), etc.
The calculator will tell you if the resulting due date is a weekend. If you need a weekday due date, use the Business Days option or manually adjust.
Yes, completely free. No sign-up required. All calculations happen in your browser — your data stays private.