Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
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.
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.
Key differences
| Project Duration Estimator (PERT) | Critical Path Duration Calculator | |
|---|---|---|
| Category | Project Management | Project Management |
| Inputs required | 3 | 4 |
| Result | Expected Duration (days) | Expected Project Duration (days) |
| What it does | 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. | 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. |