PERT Expected Time Duration of a Project Calculation

 PERT Formula & Calculation

An online pert calculation, formula and example problems.

How PERT calculator works?

• PERT Formula:
• T_E = (O + 4T + P) / 6
• where,
• T_E = Pert Expected Time Duration,
• O = Optimistic estimate,
• P = Pessimistic estimate,
• T = Typical estimate
•  
• PERT Standard Deviation (SD) Formula:
• SD = (P - O) / 6
• where,
• SD = Standard Deviation,
• P = Pessimistic estimate,
• O = Optimistic estimate