Wind calculators
Turbine energy, wind shear, power density, Weibull statistics and wind-farm economics.
Wind turbine energy & payback
Pick a site and a turbine: we download a full year of hourly NASA wind at 50 m, shear it to your hub height, correct for air density and losses, and turn it into kWh, capacity factor, revenue and payback.
live data WindWind farm economics
A utility-scale project model in one page: turbines, capacity factor or wind speed, capex, opex, PPA price and debt → annual MWh, LCOE, project and equity IRR, DSCR, land area and homes powered.
WindWind speed at height
Convert a measured wind speed to any height from 0 to 200 m with both the Hellmann power law and the logarithmic wind profile, and see what the extra height does to available power.
WindWind power density
Wind power density is the single best number for comparing wind sites. Enter a mean speed, height and Weibull k to get W/m², the NREL wind power class and how much energy hides in strong winds.
WindWeibull wind distribution
Describe a wind climate with two numbers. Enter k and c, mean speed and k, or mean and standard deviation to get the probability curve, hours per speed bin, energy pattern factor and operating hours of a turbine.