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Both calculators run independently — change the inputs on either side to compare results.

Project Budget Variance Calculator

Compute your project's Cost Variance (CV), Cost Performance Index (CPI), and Estimate at Completion (EAC) using Earned Value Management inputs. Use it during project execution to detect cost overruns before they become unrecoverable.

Earned Value (EV) ($)

Actual Cost (AC) ($)

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.

Optimistic Duration (days)

Most Likely Duration (days)

Pessimistic Duration (days)

Fill in the required fields to see your result.

Key differences

	Project Budget Variance Calculator	Project Duration Estimator (PERT)
Category	Project Management	Project Management
Inputs required	2	3
Result	Cost Variance (CV) ($)	Expected Duration (days)
What it does	Compute your project's Cost Variance (CV), Cost Performance Index (CPI), and Estimate at Completion (EAC) using Earned Value Management inputs. Use it during project execution to detect cost overruns before they become unrecoverable.	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.