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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

Fill in the required fields to see your result.

Project Management

Critical Path Duration Calculator

Sum the durations of three sequential tasks to estimate critical-path duration. Use it for very simple linear project sizing or as an introduction to the critical-path concept — for real projects with branching dependencies, use proper CPM software.

Task 1 Duration (days)

Task 2 Duration (days)

Task 3 Duration (days)

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Key differences

	Critical Path Method Calculator	Critical Path Duration Calculator
Category	Project Management	Project Management
Inputs required	5	3
Result	Critical Path Duration (days)	Critical Path 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.	Sum the durations of three sequential tasks to estimate critical-path duration. Use it for very simple linear project sizing or as an introduction to the critical-path concept — for real projects with branching dependencies, use proper CPM software.