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Free Project Timeline Calculator — Plan Schedules Online
Build a project timeline with tasks, dependencies, working days, and milestones. Export to CSV or JSON — free, no signup.
Task schedulingDependenciesWorking daysMilestonesCSV exportGantt-style
Interactive Project Timeline Calculator Workspace
Process your files or inputs directly in your browser. Many workflows run locally; features that need network data or a service are identified on their tool page.
At a glance
Project Timeline Calculator — The Project Timeline Calculator helps you turn a project plan into a practical schedule with task durations, dependencies, working days, holidays, milestones, buffers and a target deadline.
Free for the core workflow, no account required. The tool runs in the browser and does not need to send the session data to ExpTool servers.
About Project Timeline Calculator
The Project Timeline Calculator helps you turn a project plan into a practical schedule with task durations, dependencies, working days, holidays, milestones, buffers and a target deadline.
Use it as a lightweight project schedule calculator when you need to estimate a project finish date without opening a full project-management platform. Dependency-driven scheduling lets independent tasks share the same start date while dependent tasks wait for their predecessor. Sequential mode creates a simple task-by-task timeline. The calculator runs in the browser and can export the schedule as CSV or JSON.
Primary objective: Build a project schedule from task durations, dependencies, working days, holidays, team capacity, milestones and deadline targets.
Privacy assurance: The tool runs in the browser and does not need to send the session data to ExpTool servers.
How to Use Project Timeline Calculator
- Enter the project name, start date, optional target deadline and normal work hours per day.
- Choose your working days, add holidays or other non-working dates, and select dependency-driven or sequential scheduling.
- Add tasks with duration, effort, owner, priority, dependency, lag, milestone status and notes.
- Review the projected finish date, working days, calendar days, effort, deadline status and visual timeline.
- Export the schedule to CSV for spreadsheets or JSON for a portable project-plan backup.
Key Use Cases & Applications
- Estimating website, software and product launch schedules.
- Planning marketing campaigns, content calendars and business projects.
- Calculating project duration while excluding weekends and holidays.
- Mapping task dependencies before creating a formal Gantt chart.
- Checking whether a planned task list fits a target deadline.
Frequently Asked Questions
What is a project timeline calculator?
A project timeline calculator estimates when tasks and a project can start and finish based on task duration, working days, dependencies and other scheduling assumptions.
How is the project finish date calculated?
ExpTool schedules each task on selected working days. In dependency-driven mode, a task waits for its selected predecessor and any lag. Sequential mode chains tasks in the order shown.
Does the calculator exclude weekends?
Yes, you can choose exactly which days of the week are working days. Saturdays and Sundays are excluded by default.
Can I add holidays to the project schedule?
Yes. Enter non-working dates such as public holidays, office closures or planned shutdown days so they are skipped when dates are calculated.
What is a task dependency?
A dependency means one task is linked to another task. For a finish-to-start style schedule, the dependent task begins after its predecessor finishes.
What is project buffer?
A buffer is extra time added to planned task duration to account for uncertainty. It is a planning assumption, not a guarantee that a project will finish early or late.
Can I use this as a Gantt chart calculator?
It provides a lightweight timeline visualization that shows each task's position and duration. It is useful for planning, while dedicated project-management software may provide richer collaboration features.
Can I export my project timeline?
Yes. You can export the calculated task schedule as CSV and save the project configuration as JSON.
Is this project timeline calculator free?
Yes. The ExpTool calculator is designed for free browser-based project scheduling without requiring a separate project-management application.