How To Calculate Door Opening Size

Measure from the bottom of the sill to the thickest part of the header.

How to calculate door opening size. Door weight kg density specific gravity x door height mm x door width mm x door thickness mm 1 000 000. Very important here is to properly determine what the actual opening size is for the component being considered. Learn how to correctly measure your opening to ensure your new eliason door fits perfectly. For a product like a 36 x 48 single hung window for example the opening size to use with the above chart would be the width height of the window or 12sqft.

Leaderflush shapland presents effective clear width which ensure the correct door leaf width on the basis of several variables of door thickness frame stop size hinge throw and face fixed items on the closing face. The standard width of a steel entry door s rough opening is 3 4 40 for a single door and 6 4 76 for a double door. The most common thickness is 1 75 inches 4 4 cm. Write down your measurement width x height for each inside frame measure.

Select the call size of the door from the drop down list check the second radio button calculate with jamb over all and door call size then click calculate button. These numbers should be close to the same but it can be helpful to know both of them. Our interactive clear opening widths calculator below allows you to work out the clear opening width leaf width frame width or structural opening width for a number of varied door constructions. Measure this edge on the door frame known as the jamb as well.

Input your data into the box below and the weight of a single door will be automatically calculated. Calculate dimensions from a rough opening size and door call size. Hold a tape measure to the edge of the door and record its thickness. Do this for both the width and height for each door.

With your tape measure you want to measure on the inside of the frame. To use the calculator click on filter 1 for the leaf configuration filter 2 for the leaf action and filter 3 for the known dimensions for the required construction. The final sum is your opening height. Make sure to add an additional of an inch on each side for room for the frame to shimmy.