ACShim: Window Air Conditioner Shim & Seal Planner

How it helps

Use it for a focused task

ACShim helps you plan custom shims and weatherstripping for window AC units. Select your window type, enter frame and AC dimensions, measure your gaps, and get a complete cutting plan with material list and security recommendations.

Start by picking your window type. Enter the inside frame width and height, then your AC unit dimensions.

Measure the gaps around your installed unit and enter them. The planner updates live with shim dimensions, weatherstripping lengths, and a material list.

Good next steps

Make the result easier to act on

• Start with the examples or presets if you are unsure what to enter for ACShim: Window Air Conditioner Shim & Seal Planner.
• Try one realistic scenario first, then adjust the numbers or notes to compare another path.
• Use save or share from the project footer when you want to return to the same helper later.
• Open a related project below when the result points to a timing, budget, writing, planning, or comparison task.