Densidade potência vento
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
0.5 × ρ × v³
About this calculator
The wind power density calculator estimates energy available in one cubic meter of moving air. It uses the formula P = 0.5 × ρ × v³, where ρ is air density (kg/m³) and v is wind speed (m/s). This tool is essential for wind energy projects, helping assess a region's potential based on local conditions.
Wind speed has the most significant impact in the formula due to its cubed factor. Small changes in speed drastically affect available power. Air density varies with altitude and temperature, influencing results in highlands or coastal areas.
Use this calculator for wind energy feasibility studies, environmental assessments, or turbine planning. The result shows theoretical power potential, not the actual energy captured by turbines, which depends on equipment efficiency and installation conditions.
For accuracy, collect wind speed data at turbine height (typically 50-100m) and use region-specific air density values. Avoid general estimates: local real-world data ensures reliable results for decision-making.
Frequently asked questions
Why is wind speed cubed in the formula?
Wind power grows exponentially with speed. A 10% increase in speed triples available energy, making speed the most critical factor in assessment.
How to get air density values?
Consult altitude and temperature tables. Typical values are 1.225 kg/m³ at sea level (15°C) and 1.112 kg/m³ at 1000m altitude.
Can I use this calculator to size wind turbines directly?
Not directly. The result indicates theoretical power, but wind turbines have maximum efficiencies (up to 59% theoretical) and additional losses that reduce captured energy.
What if I don't have local wind data?
Use regional averages, but be aware this reduces accuracy. Long-term measurements (1-2 years) are recommended for serious projects.
Does air density vary with humidity?
Yes, but the impact is smaller than altitude/temperature. Humid air is slightly less dense than dry air, but this difference is negligible in preliminary calculations.