EVM Calculator - Earned Value Management
Enter your project budget, planned progress, actual progress, and actual costs to calculate the full set of Earned Value Management (EVM) metrics. The calculator covers planned value (PV), earned value (EV), cost variance (CV), schedule variance (SV), cost performance index (CPI), schedule performance index (SPI), estimate at completion (EAC), estimate to complete (ETC), to-complete performance index (TCPI), and variance at completion (VAC). Results update instantly with a step-by-step breakdown and a performance chart.
What is Earned Value Management?
Earned Value Management (EVM) is a project management technique that integrates scope, schedule, and cost into a single performance measurement framework. Originally developed by the U.S. Department of Defense in the 1960s under the name PERT/Cost, EVM gives project managers an objective, data-driven way to answer two questions at any point during a project: are we ahead or behind schedule, and are we under or over budget? By comparing what was planned with what has actually been accomplished and what it actually cost, EVM produces indices and forecasts that help teams catch problems early and make informed decisions before small variances become large overruns.
Core EVM metrics and formulas
Three baseline values anchor every EVM analysis. Planned Value (PV) is the budgeted cost of work scheduled to be done by a given date (PV = planned % complete x BAC). Earned Value (EV) is the budgeted cost of the work actually finished (EV = actual % complete x BAC). Actual Cost (AC) is the real money spent on that work. From these three values all other metrics derive. Cost Variance (CV = EV - AC) shows whether work costs more or less than planned; a negative number means cost overrun. Schedule Variance (SV = EV - PV) shows whether the team is ahead or behind schedule in dollar terms; a negative number means behind. The Cost Performance Index (CPI = EV / AC) expresses cost efficiency: a CPI of 0.85 means that for every dollar spent, only 85 cents of value is being produced. The Schedule Performance Index (SPI = EV / PV) expresses schedule efficiency in the same way.
Forecasting with EAC, ETC, VAC and TCPI
Once performance indices are known, EVM enables credible forecasts for the rest of the project. The Estimate at Completion (EAC) projects the total cost if current trends continue. The most common formula is EAC = BAC / CPI, which assumes the cost efficiency seen so far persists to the end. If the overrun was a one-time event and future work will run on budget, EAC = AC + (BAC - EV) is more appropriate. A schedule-weighted version uses EAC = AC + (BAC - EV) / (CPI x SPI) when schedule pressure is degrading productivity. Estimate to Complete (ETC = EAC - AC) is simply the additional money needed. Variance at Completion (VAC = BAC - EAC) is the projected surplus or deficit. The To-Complete Performance Index (TCPI = (BAC - EV) / (EAC - AC)) tells you what cost efficiency is required on remaining work to finish within the target budget; values above 1.10 are generally considered unrealistic without scope or resource changes.
Choosing an EAC forecast method
Selecting the right EAC method depends on the nature of past variances. Use the CPI-based formula (BAC / CPI) when the variance is systemic and performance is likely to continue at the same efficiency. Use the fixed-overrun formula (AC + remaining budget) when the overrun was caused by a one-time event such as a natural disaster, a key team member departure, or an unexpected regulatory requirement, and future work is expected to proceed as originally planned. Use the CPI x SPI method on projects where schedule slippage is directly increasing costs, for example when delayed decisions are forcing overtime. Each method is accepted by PMI and the PMBOK Guide; the choice should be documented and reviewed with stakeholders.
EVM Performance Index Interpretation
| Index Value | Meaning | Status |
|---|---|---|
| > 1.10 | Significantly better than planned | Good |
| 1.00 - 1.10 | On plan or slightly better | Good |
| 0.90 - 0.99 | Slightly worse than planned | Watch |
| < 0.90 | Significantly worse than planned | Act |
Standard thresholds for CPI and SPI used in PMBOK and project management practice.
Frequently asked questions
What is the difference between PV, EV, and AC?
Planned Value (PV) is the budget allocated to the work that should have been done by now according to the schedule. Earned Value (EV) is the portion of the budget that corresponds to the work actually completed. Actual Cost (AC) is the real money that has been spent on that work. EVM works by comparing all three: if EV is less than PV you are behind schedule, and if AC is more than EV you are over budget.
What does a CPI of less than 1.0 mean?
A Cost Performance Index below 1.0 means the project is spending more money than the value of work being delivered. For example, a CPI of 0.80 means that for every dollar spent, only 80 cents of planned value is earned. The lower the CPI, the more severe the cost overrun, and the less likely it is to recover without a formal corrective action or re-baseline.
How is EAC different from ETC?
Estimate at Completion (EAC) is the projected total cost of the entire project from start to finish. Estimate to Complete (ETC) is the projected cost of finishing only the remaining work. The relationship is ETC = EAC - AC, where AC is the money already spent. EAC answers "what will this project cost in total?" while ETC answers "how much more money do we need?"
What is a realistic TCPI value?
Most practitioners consider a To-Complete Performance Index of up to 1.10 to be achievable with focused effort. A TCPI above 1.10 is generally viewed as a red flag, indicating that the team would need to be significantly more efficient on remaining work than on completed work, which is statistically unlikely without scope reduction, additional resources, or a formal re-baseline of the budget.
Can EVM be used on small or simple projects?
Yes. EVM scales down well. For a small project with a single work package you only need three numbers: the total budget (BAC), the percentage that should be done by today (planned % complete), and the percentage actually finished (actual % complete), plus the costs spent so far (AC). This calculator handles exactly that case. Larger programs add multiple work packages and roll them up, but the underlying formulas are identical.
What is the difference between Schedule Variance in dollars and in time?
This calculator computes Schedule Variance in dollar terms (SV = EV - PV), which is the most common EVM formulation. It expresses schedule slippage as a budget equivalent rather than calendar days. A separate technique called Earned Schedule (ES) converts SV into actual time units, which can be more intuitive. For a rough conversion, divide the dollar SV by the planned spend rate (budget per month) to estimate how many months behind or ahead the project is.