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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

Project Buffer Calculation Tool

Calculate a project buffer size using Critical Chain methodology to protect the delivery date against uncertainty and variability in task estimates. Use it during project planning when risks are hard to quantify individually.

Critical Path Duration (days)

Task Uncertainty Level

Number of Critical Tasks (tasks)

Organizational Maturity

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Key differences

	Critical Path Method Calculator	Project Buffer Calculation Tool
Category	Project Management	Project Management
Inputs required	5	4
Result	Critical Path Duration (days)	Recommended Project Buffer (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.	Calculate a project buffer size using Critical Chain methodology to protect the delivery date against uncertainty and variability in task estimates. Use it during project planning when risks are hard to quantify individually.