# How to measure a floor

To calculate how much square foot or meters you'll need for vinyl floor installation, you'll need to know the total area.

**For Squares and Rectangles**

For square and rectangle areas, the formula would be:

length * width = area

So if a rectangle's length is 15 and its width is 10:

15 * 10 = 150 square feet / meters needed

Usually, you want to add the "waste factor," which accounts for any damages or extra cuts you'll need. The standard waste number is 10%.

With waste, the final formula will now be:

**area * (1 + waste number) = square feet / meters needed**

Using the area (150) calculated above, this would be:

150 * (1 + 0.1)

OR

150 * 1.1 = 165 square feet / meters needed

**For Triangles**

To calculate triangles, the formula will be:

1/2 (base) * height = area

So if the base is 12 and the height is 9, then we'll get:

1/2 (12) * 9 = area

OR

6 * 9 = 54 square feet / meters

With the waste factor, the final formula is the same as with squares and rectangles:

**area * (1 + waste number) = square feet / meters needed**

So using the triangle's area (54) above and a waste of 10%, we get:

54 * (1 + 0.1) = square feet / meters needed

OR

54 * 1.1 = 59.4 square feet / meters needed

**For rooms with both Triangle and Square/Rectangle shaped rooms**

For rooms that have a both a triangle and square/rectangle shape, you'll have to calculate each area separately. Use the square/rectangle and triangle area formulas (with waste included) above.