Important Message from Engineering Express

By clicking below, you agree that the use of this design aid is for estimating purposes only. Results are not valid for use & no construction or design shall be performed without the review and certification by a registered professional engineer.

No warranty or guarantee whatsoever is offered with any results obtained herein.



Use this calculator to convert wind velocity to a corresponding wind pressure for host attached & freestanding canopies, Sunrooms, and Pergolas.

Certified Copies for permit can be purchased by clicking below.

Notes: This calculator checks wind pressure only. The user shall identify and consider all roof snow and snow drift loads as well as other imposing dead, construction, seismic, and live loads before selecting final loads for use.

Typical use of this calculator is to determine wind forces to be used to find allowable panel spans for a variety of manufacturer products. Not valid for use without review and certification from a licensed professional from Engineering Express.

Related Resources

Wind Speed To Pressure Conversion Charts – purchase a sealed engineering plan for permit showing several ‘worst case’ values from the above calculator. Best for quick use of multiple, similar projects where the answer ‘just works’ without the fine tuning.

Click Here to view a sample of the chart