This calculator estimates the yearly electrical energy generated by a onshore wind project from nameplate capacity, expected capacity factor, and an availability adjustment.
Developers, analysts, and asset owners can use the result for early energy-yield screening, revenue scenarios, and comparisons between projects. It is an engineering estimate rather than a substitute for a site-specific wind-resource and loss assessment.
Use the project’s total nameplate capacity in megawatts.
Use a representative net or gross capacity factor, consistently with your availability assumption.
Enter the share of otherwise expected generation that remains after the chosen adjustment.
Compare net MWh, average power, and equivalent full-load hours.
Annual output (MWh) = Capacity (MW) × 8,760 hours × Capacity factor × Availability adjustment
Enter both percentages as percentages; the calculator converts them to decimals. Capacity factor represents resource and operating performance, while the separate adjustment can account for additional availability or curtailment assumptions.
The main result expresses estimated net annual generation. Use the supporting values to confirm that the scale and assumptions are internally consistent.
Results are planning estimates based on constant inputs and do not replace site-specific engineering, operational, or financial analysis.
A Onshore Wind project has 100 MW, 38% capacity factor, and 97% availability adjustment.
Gross output = 100 × 8,760 × 0.38 = 332,880 MWh. Net output = 332,880 × 0.97 = 322,894 MWh.
Estimated annual output is 322,894 MWh, equivalent to an average delivered power of 36.86 MW.
It represents estimated net annual generation. It reflects only the values entered and should be interpreted within the stated assumptions.
Use one consistent basis. Do not apply a loss, availability, or cost adjustment twice if it is already embedded in another input.
Use 8,784 hours when the measured period is a full leap year and the calculator includes a period-hours field. For planning estimates, 8,760 hours is the conventional annual basis.
Resource variation, curtailment, downtime, equipment degradation, grid constraints, and measurement boundaries can all change realized results.
Yes, if the inputs use matching definitions and periods. For investment or engineering decisions, compare the underlying assumptions as well as the headline result.