Project Deadline Calculator

Calculate project deadlines and timelines.

How to Do It Manually

Estimate project completion by breaking it into tasks, estimating time for each, and accounting for dependencies. Use Gantt chart or simple addition.

Project Duration = longest critical path through all dependent tasks
  1. List all project tasks.
  2. Estimate time for each task.
  3. Identify dependencies (which tasks must complete before others).
  4. Find the longest path (critical path).
  5. Add buffer time for unknowns (typically 10–20%).

Frequently Asked Questions

What's a critical path?

The sequence of tasks that determines the minimum project duration. Delays here delay the entire project.

Should I add buffer time?

Yes, always add 10–20% contingency for unexpected issues, revisions, and delays.