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Both calculators run independently — change the inputs on either side to compare results.
Project Management
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.
Fill in the required fields to see your result.
Project Management
Cost Performance Index Calculator
Calculate the Cost Performance Index (CPI) — the ratio of Earned Value to Actual Cost — to measure cost efficiency. Use it as a core EVM metric to determine whether the project is delivering value efficiently or overrunning the budget.
Fill in the required fields to see your result.
Key differences
| Schedule Performance Index Calculator | Cost Performance Index Calculator | |
|---|---|---|
| Category | Project Management | Project Management |
| Inputs required | 2 | 2 |
| Result | Schedule Performance Index | Cost Performance Index |
| 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 Performance Index (CPI) — the ratio of Earned Value to Actual Cost — to measure cost efficiency. Use it as a core EVM metric to determine whether the project is delivering value efficiently or overrunning the budget. |