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Critical Path Calculator

Calculate project duration, task float and the critical path using task dependencies.

Enter your figures

Enter the values below to calculate your result.
Format: Task:duration:dependencies. Separate multiple dependencies with |. Example: C:4:A|B

Calculation Results

Based on the figures you entered.
Critical path
Enter tasks and calculate
Durations are in working-day units. The calculator uses the standard critical-path forward and backward pass and requires an acyclic dependency network.

How to use this calculator

What to enter

Enter the values requested in each field: Tasks. Keep time units, work calendars, and currency amounts consistent, and follow any field notes and validation messages.

What the result means

The schedule result estimates a project or task date, duration, working-day count, milestone, or schedule flexibility from the task and calendar values entered. Check the start/end-date convention, workweek, holidays, dependencies, and whether the end date is inclusive.

When to use it

Use this to plan a project schedule or check a target date. Update dependencies and calendars when plans change; actual delivery can be affected by resource constraints, delays, and work that is not represented in the inputs.