# Roll Insulation Calculator: Easily Calculate How Much Roll Insulation You Need

Here is a simple calculator to know how much roll insulation you need for your home improvement project. It is actually very simple to calculate this, you don’t even need to have a calculator. However, here it is for your convenience;

#### Area (Sq.ft)

Length

Width

The number of roll insulations you need to buy solely depends on the square feet area of the place you want to insulate. For that, you need to input the height and width or length and width of the area into the calculator above. This will give you how many square feet that area is, and that is how much roll insulation you need.

As you know, roll insulation comes in rolls. These rolls already have a fixed thickness, area and R-value rating. Therefore, once you decide on the R-value, all you need to do is buy enough square feet of the insulation with that R-value rating.

For example, if you need R30 roll insulation to cover 125 sq. ft of area, you need to buy four of these: Owens Corning R 30 roll insulation.

Charles John

A novice DIYer who learns about home ventilation. I am a mechanical engineer and have a basic knowledge of HVAC systems but I learn continuously to make myself the best blogger in that space.