Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
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.
Fill in the required fields to see your result.
Project Management
Project Duration Estimator (PERT)
Estimate realistic task or project durations using the PERT three-point technique, which blends optimistic, most-likely, and pessimistic scenarios into a single weighted average. Use it whenever a single-point estimate feels too uncertain.
Fill in the required fields to see your result.
Key differences
| Critical Path Duration Calculator | Project Duration Estimator (PERT) | |
|---|---|---|
| Category | Project Management | Project Management |
| Inputs required | 4 | 3 |
| Result | Expected Project Duration (days) | Expected Duration (days) |
| What it does | 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. | Estimate realistic task or project durations using the PERT three-point technique, which blends optimistic, most-likely, and pessimistic scenarios into a single weighted average. Use it whenever a single-point estimate feels too uncertain. |