How to measure this project
Measure each framed screen opening that will receive the repeated slats. Use the clear width across the slat field rather than the outside frame dimension, and use the actual slat cut length between the selected top and bottom limits. If several screens match exactly they can share one calculation; otherwise keep them separate. Record slat orientation because horizontal and vertical layouts use the dimensions differently.
Before you buy materials
Enter the installed slat face width and gap already chosen for the screen. The stock conversion uses total linear footage and therefore assumes offcuts may be reused; verify actual cut yield from the selected stock length, especially when each slat is nearly as long as a stock piece. Keep structural frame sizing, wind resistance, privacy performance, guard requirements and fastening details outside the quantity math.