The only free wind load calculator you may find online is for MWFRS. This is only good to understand if your entire structure will blow over in specified wind conditions. The best wind load calculator calculates wind loads for Components and Cladding, which allows you to calculate the wind load pressures for windows, doors, roofs, shutters, etc. This is a very involved calculation, and only Windloadcalc.com has proven to be the most accurate for and the most user friendly program for over a decade! People have left other program companies and come to us, time and time again. If you are looking for the best wind load calculator, windloadcalc.com is the specialist for you.