To calculate lineal feet of trim, (e.g. base, quarter round) simply measure each wall in the room and add up the lineal feet. For ease of installation use whole pieces where ever possible. Allow extra for cutting each corner and splicing pieces together.

rooms combined to display linear feet calculations

To determine the square footage of a square or rectangular room, measure the length and width of the room in feet or inches and enter the values in Area 1 of the calculator below.  For irregularly shaped areas or multiple rooms, it is helpful to draw a diagram and divide the room up into sections. Treat each section as a separate area, as in this illustration. Input the measurements of each area below to see the total SQFT needed.

rooms combined to display sqft calculations

 
Area Length
Area Width
feet
inches
feet
inches
Area 1
Area 2
Area 3
Area 4

SKU: 10024711

Norge 
7" Speed Square -Alumunim


7" Speed Square

Quick Highlights:
- Heavy duty aluminum
- Calculate rafter pitch and slope
- Cast markings can't rub off
- Self-standing with flat base
- More accurate with easy-to-read molded markings
- More durable with aluminum alloy die-casting 
- Thick edge makes for a safer saw guide

Specs:
- Size: 10" x 7-1/4" x 7-1/4"
- Weight: 0.03 lbs.
- 7" square, fits in pocket 
- Marked with inches and degrees, molded into square