Is this PERT Calculator free to use?

Yes, PERT Calculator is 100% free to use online with no installation or account required.

How do I use the PERT Calculator?

Simply enter your values into the required input fields and click calculate to view the results instantly.

Yes, the calculator is fully responsive and compatible with Android, iOS, Windows, macOS, and Linux web browsers.

PERT Calculator — Free Online Tool

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Calculate project expected completion time and standard deviation

Formula: Expected Time $TE = \frac{O + 4M + P}{6}$ where $O$ = Optimistic, $M$ = Most Likely, $P$ = Pessimistic.

Time Estimates (days/units)

Optimistic ($O$)

Most Likely ($M$)

Pessimistic ($P$)

⚠️ For project management planning, academic study, and reference purposes only.

Our professional calculator tools are designed to provide accurate, fast, and reliable results for financial, health, and everyday calculations.

All calculations are processed instantly in your browser with real-time output.

Your data is never stored. Everything runs locally for complete privacy.

Built using verified mathematical formulas to ensure precise and reliable results.

Fully responsive design works smoothly on desktop, tablet, and mobile devices.

From EMI to BMI and GST, access multiple calculators in one place.

Professional UI with clean layout, smooth animations, and easy navigation.