Enter BAC, PV, EV and AC to instantly calculate all EVM metrics — CPI, SPI, EAC, ETC, VAC, TCPI and more. Powered by PMBOK 6th Edition formulas.
Enter individual cost items to calculate your Budget at Completion
Test your earned value knowledge with PMBOK-based questions
| Abbr | Old Name | Full Name | Formula | Meaning |
|---|---|---|---|---|
| BAC | — | Budget at Completion | Sum of budgets | Fixed baseline |
| PV | BCWS | Planned Value | %plan × BAC | Scheduled work value |
| EV | BCWP | Earned Value | %done × BAC | Work value done |
| AC | ACWP | Actual Cost | — | Money spent |
| CPI | — | Cost Performance Index | EV / AC | >1 = under budget |
| SPI | — | Schedule Performance Index | EV / PV | >1 = ahead of schedule |
| CV | — | Cost Variance | EV − AC | Neg = over budget |
| SV | — | Schedule Variance | EV − PV | Neg = behind schedule |
| EAC | — | Estimate at Completion | BAC / CPI | Projected final cost |
| ETC | — | Estimate to Complete | EAC − AC | Remaining cost |
| VAC | — | Variance at Completion | BAC − EAC | Budget surplus/deficit |
| TCPI | — | To-Complete Perf. Index | (BAC−EV)/(BAC−AC) | Needed efficiency |
Budget at Completion (BAC) is the total approved budget for all project work, established at baseline before execution begins. It is the fixed financial benchmark against which Earned Value (EV) and Actual Cost (AC) are measured throughout the project lifecycle. Per PMBOK 6th Edition p.263, BAC equals the sum of all budgets for work to be performed.
Use this free budget at completion calculator by first building your BAC bottom-up from individual cost items in the BAC Builder tab, then entering your PV, EV and AC to compute all EVM metrics instantly.
To calculate budget at completion, use the BAC Builder tab: enter each cost category (labour, materials, equipment, subcontractors, overhead, contingency) and the tool sums them into your BAC automatically. Then enter PV (planned value), EV (% complete or $ amount), and AC (actual cost) to instantly calculate CPI, SPI, all four EAC formulas, ETC, VAC and TCPI. No sign-up. 100% client-side.
The PMBOK 6th Edition defines four Estimate at Completion (EAC) formulas. Choose based on your project situation: EAC=BAC/CPI when past performance continues; EAC=AC+(BAC-EV) for one-time variance; EAC=AC+(BAC-EV)/CPI for sustained cost impact; EAC=AC+(BAC-EV)/(CPI×SPI) when schedule pressure adds cost. This EAC calculator shows all four simultaneously.
The PMP® exam tests all earned value management formulas from PMBOK 6th Edition. Use the PMP Practice tab for interactive quiz questions and the complete EVM terminology reference table — including the older BCWP, BCWS and ACWP terms that still appear on the exam.
Cost Performance Index (CPI) = EV ÷ AC. It is the most important single metric in Earned Value Management — it tells you how efficiently your project is spending its budget. CPI above 1.0 means under budget (for every $1 spent, more than $1 of work was completed). CPI below 1.0 means over budget. Research shows that once CPI drops below 0.9, it rarely recovers after the 20% completion mark — making early measurement critical.