Task Deadline Calculator
Calculate realistic deadlines that account for weekends and public holidays. Works forward to find a deadline from a start date, or backward to find when you need to start. Supports 8 country holiday presets with visual timeline - free, no signup.
Task Deadline Calculator
Working days · holidays · forward & backward modes
Calculated Deadline
Deadline
Wed, Aug 12, 2026
Working Days
10
14
Calendar Days
11
Actual Working Days
79%
Work / Calendar
Features
Smart deadline calculations that account for real working days
Forward & Backward Modes
Calculate the deadline from a start date + working days, or find the start date from a deadline - both directions supported with full working day accuracy.
8 Country Holiday Presets
Built-in public holiday calendars for US, UK, Canada, Australia, India, Germany, Japan, and Brazil. Holidays are automatically excluded from working day counts.
Weekend Exclusion
Toggle weekend exclusion (Saturday & Sunday) on or off. All results update in real-time showing calendar days, working days, and the work-to-calendar ratio.
Visual Timeline
See your project timeline at a glance with an interactive bar chart showing the proportion of working vs non-working days, plus exact dates with weekday labels.
Use Cases
Who needs working-day deadline calculations
Project Management
Calculate realistic project deadlines that account for weekends and public holidays. Set accurate delivery dates that stakeholders can rely on.
Academic Planning
Plan assignment submissions, thesis deadlines, and study schedules around term breaks and public holidays to avoid last-minute rush.
Software Development
Estimate sprint completion dates and release deadlines in working days. Plan development cycles that account for non-working days.
Contract & Legal Deadlines
Calculate legal deadlines that exclude weekends and holidays. Many jurisdictions count working days only for filing and response periods.
Construction & Renovation
Plan renovation and construction timelines based on working days. Account for public holidays when scheduling contractors and deliveries.
Event Planning
Work backwards from event dates to plan preparation timelines. Know exactly how many working days you have to complete each task.
About
Smart deadline planning for real-world schedules
Accurate Working Day Calculation
The calculator iterates through each calendar day, checking for weekends and configured holidays. This ensures 100% accuracy regardless of date ranges or holiday schedules.
100% Private & Local
All calculations are performed in your browser. No dates or project data are sent to any server - your deadlines stay completely private.
Multi-Country Holiday Support
Built-in holiday presets for 8 countries with plans for more. Each preset includes nationally recognized public holidays. Holidays falling on weekends are handled correctly.
Free & No Signup
No account, no API key, no usage limits. The Task Deadline Calculator is completely free for personal, academic, and professional use.
Frequently Asked Questions
Everything you need to know about the Task Deadline Calculator
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