This estimator calculates the realized capacity factor of a onshore wind facility using measured energy, installed capacity, and the exact hours in the reporting period.
Operators can use it to normalize performance across projects of different sizes. The value combines resource conditions, downtime, losses, and curtailment, so it does not by itself identify why performance changed.
Use exported or metered MWh for the full reporting period.
Use the same installed MW basis used in operational reporting.
Match the hours to the energy measurement window.
Review capacity factor alongside average power and full-load hours.
Capacity factor (%) = Actual energy output (MWh) ÷ [Installed capacity (MW) × Period hours] × 100
The numerator and denominator must cover the same period. Use 8,760 hours for a standard 365-day year or 8,784 for a leap year.
The main result expresses energy produced as a share of maximum possible output. 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.
Annual output is 332,880 MWh from 100 MW over 8,760 hours.
Theoretical maximum = 100 × 8,760 = 876,000 MWh. Capacity factor = 332,880 ÷ 876,000 × 100 = 38.00%.
The estimated capacity factor is 38.00%. It summarizes actual energy production relative to continuous full-power operation.
It represents energy produced as a share of maximum possible output. 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.