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Both calculators run independently — change the inputs on either side to compare results.

Critical Path Method Calculator

Estimate the minimum project duration accounting for task dependencies, parallel workstreams, and resource constraints. Useful during project planning to find schedule bottlenecks.

Longest Task Sequence Duration (days)

Sum of All Task Durations (days)

Maximum Parallel Tasks (tasks)

Dependency Complexity

Resource Availability

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Project Management

Critical Path Duration Calculator

Estimate project duration using PERT (Program Evaluation and Review Technique) with optimistic, most likely, and pessimistic time estimates. Ideal for project managers who need a statistically weighted schedule with a built-in buffer.

Optimistic Duration (days)

Most Likely Duration (days)

Pessimistic Duration (days)

Schedule Buffer

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Key differences

	Critical Path Method Calculator	Critical Path Duration Calculator
Category	Project Management	Project Management
Inputs required	5	4
Result	Critical Path Duration (days)	Expected Project Duration (days)
What it does	Estimate the minimum project duration accounting for task dependencies, parallel workstreams, and resource constraints. Useful during project planning to find schedule bottlenecks.	Estimate project duration using PERT (Program Evaluation and Review Technique) with optimistic, most likely, and pessimistic time estimates. Ideal for project managers who need a statistically weighted schedule with a built-in buffer.