Project Settings

Configure your project basics before adding tasks

Working Days Per Week
No tasks yet — add your first task above to get started.

Project Timeline

Total Duration
—
working days
End Date
—
project completion
Total Tasks
—
sequential
Calendar Days
—
incl. weekends

Visual Gantt Chart

What Is a Gantt Chart?

A Gantt chart is a horizontal bar chart that visually represents a project schedule over time. Each task appears as a bar whose length corresponds to its duration, and bars are positioned on a timeline to show when each task starts and ends. Developed by Henry Gantt in the early 1900s, Gantt charts remain the most widely used project scheduling tool in the world.

For agencies and project managers, Gantt charts solve a fundamental communication problem: they translate complex, interdependent work into a single visual that every stakeholder can understand at a glance — no PMP certification required.

1

Define Tasks

Break the project into discrete, deliverable tasks. Each task should have a single clear output.

2

Estimate Duration

Assign working-day estimates to each task. Build in buffer for review cycles and approvals.

3

Set Start Date

Anchor the timeline to a real project start date. The tool calculates all subsequent dates automatically.

4

Review & Share

Export the Gantt chart for client presentations or team kick-off meetings.

Working Days vs. Calendar Days

This calculator lets you choose between 5-day, 6-day, and 7-day working weeks. This matters more than it might seem:

Always align your working-day setting with your team's actual availability. Presenting a timeline built on 7-day weeks to a team that works 5 days will create trust issues when deadlines are missed.

Tips for Accurate Project Timeline Estimates

  1. Use bottom-up estimation. Break large tasks into smaller subtasks and sum up. Estimates for small tasks are more accurate than estimates for big ones.
  2. Factor in review and approval time. Client feedback cycles, legal reviews, and internal QA can each add days. Add explicit "Review" tasks to your Gantt.
  3. Add a buffer at the end. A 10–15% schedule buffer on the total project duration absorbs unexpected delays without blowing the deadline.
  4. Track actuals vs. estimates. After each project, compare planned vs. actual durations. Over time, you will build a reliable estimation database specific to your team.
  5. Communicate slippage early. If a task runs over, update the Gantt immediately. Surprises at the end are far more damaging than early warnings.

Frequently Asked Questions

Add a project name, start date, and working-days-per-week setting. Then add tasks with names and durations. The calculator places each task sequentially — each starts the working day after the previous task ends — and renders a proportional visual Gantt chart with exact start and end dates for every task.
This tool calculates sequential timelines (waterfall), where each task starts after the previous one ends. For parallel or dependency-based scheduling, you'll need a full project management tool like Asana, Monday.com, or Microsoft Project. Sequential Gantt charts are ideal for communicating the high-level project arc to clients.
Working days are days your team actually works. For a 5-day week, Saturday and Sunday are skipped when counting forward. For a 6-day week, only Sunday is skipped. For 7 days, every calendar day counts. This means if your project starts on a Thursday and you have a 5-day task, it will finish the following Wednesday, not the following Tuesday.
There is no hard limit. For visual clarity on the Gantt chart, 8–15 tasks is ideal. For larger projects, consider grouping related tasks into phases (e.g., "Discovery Phase — 10 days") to keep the chart readable.
Click "Export / Print" to open your browser's print dialog. From there you can save as a PDF, which is perfect for sharing with clients or including in proposals. For best results, use landscape orientation and select "Fit to page" in the print settings.
Not automatically — public holidays vary by region and are not included in the working-day calculations. To account for holidays, simply add their count to your task durations or add a dedicated "Holiday Buffer" task to your timeline.