Compare calculators

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

Schedule Performance Index Calculator

Calculate the Schedule Performance Index (SPI) — the ratio of Earned Value to Planned Value — to measure whether a project is ahead of, on, or behind schedule. Use it as a core EVM metric for project status reporting and forecasting completion.

Earned Value ($)

Planned Value ($)

Fill in the required fields to see your result.

Project Management

Earned Value Calculator

Calculate the Cost Variance (CV) for a project as Earned Value minus Actual Cost, where Earned Value = Budget At Completion × Percent Complete. Use it to determine whether you are over or under budget for the work completed to date — a more meaningful metric than simple actual-vs-planned spend.

Budget at Completion ($)

Percent Complete (%)

Actual Cost ($)

Fill in the required fields to see your result.

Key differences

	Schedule Performance Index Calculator	Earned Value Calculator
Category	Project Management	Project Management
Inputs required	2	3
Result	Schedule Performance Index	Cost Variance ($)
What it does	Calculate the Schedule Performance Index (SPI) — the ratio of Earned Value to Planned Value — to measure whether a project is ahead of, on, or behind schedule. Use it as a core EVM metric for project status reporting and forecasting completion.	Calculate the Cost Variance (CV) for a project as Earned Value minus Actual Cost, where Earned Value = Budget At Completion × Percent Complete. Use it to determine whether you are over or under budget for the work completed to date — a more meaningful metric than simple actual-vs-planned spend.