Critical Path Chart Maker

A critical path chart (often called a PERT chart) is a network diagram that maps every project task and its dependencies. The critical path is the longest sequence of dependent tasks — it determines the shortest possible project duration. Any delay on a critical path task directly delays the project end date.

PERT (Program Evaluation and Review Technique) is a project scheduling method that uses three time estimates — optimistic, most-likely, and pessimistic — to calculate an expected task duration. Once expected times are set, the critical path is identified as the longest path through the PERT network, giving project managers a probabilistic view of schedule risk.

Add your tasks with their three-point time estimates, then define which tasks each one depends on. The tool calculates expected durations, draws the dependency network, and highlights the critical path automatically. You can also describe your project to the AI and receive a ready-made PERT chart in seconds.

Yes. MakeCharts lets you create, customize, and download PERT charts completely free with no sign-up required. Free accounts include a limited number of AI-assisted chart creations. Paid plans unlock more AI credits, file uploads, and advanced export options.

The standard PERT formula is: Expected Time = (Optimistic + 4 × Most Likely + Pessimistic) / 6. This weighted average gives the most-likely estimate four times the weight of the optimistic and pessimistic extremes, producing a realistic duration that accounts for uncertainty.

Float, also called slack, is the amount of time a non-critical task can be delayed without affecting the project end date. Tasks on the critical path have zero float. The critical path chart maker can display float values on each node so you can immediately see where schedule flexibility exists.

Yes. You can add as many tasks as your project requires and define complex dependency networks with parallel tracks and multiple merge points. The auto-layout engine reflows the diagram each time you make a change, keeping it readable regardless of size.

A Gantt chart shows tasks on a time axis, making it easy to see when work happens. A PERT chart (critical path diagram) focuses on dependencies and logical relationships between tasks, making it easier to identify which tasks are truly critical and where uncertainty lives. Many project managers use both together.

Yes. Export your critical path chart as a high-resolution PNG or vector SVG file. Both formats work directly in PowerPoint, Google Slides, Word, and any other presentation or document tool.

Yes. The AI has been trained on project management concepts applicable to software development, construction, marketing, research, event planning, and more. Describe your project in plain language and the AI will generate appropriate tasks, dependencies, and time estimates.