Oct 20, 2024 · 3-point estimation and the PERT formula are two methods that can be used to estimate the completion time of a project. This can be tricky to understand, so we have included several …

PERT combines probability theory and statistics to derive a formula for the average activity from the three-point estimates. PERT estimate formula is: (O + 4M +P) / 6

Read on to find out more about the usage of PERT, see interesting facts about the method's history, and learn the PERT formula so that you can calculate it even if you don't have this tool handy.

The so-called PERT distribution leverages on the values determined with the three-point estimation technique. It can basically be used for all planning levels, ranging from activities to entire projects.

Input your optimistic, most likely, and pessimistic time estimates for each task, and the calculator will provide you with an expected completion time, standard deviation, and likelihood of finishing the …

Our PERT Formula Calculator is a free, online tool designed to help project managers, students, and professionals quickly calculate expected time, standard deviation, and variance for project activities.

Learn the PERT formula to stop project delays. Includes examples, best practices, and tools to turn uncertain timelines into reliable plans.

This PERT calculator can be employed for swift computation of the likelihood of your project being completed within the desired timeframe, on the basis of the Program Evaluation and Review …

Jul 31, 2025 · The PERT formula to calculate the expected duration (E) of a task is: E = (O + 4 * M + P) / 6. This formula provides a weighted average that balances uncertainty, making project planning …

Take full advantage of the PERT analysis, with practical insights into its operation. Try our PERT calculator for risk-free project estimation.