COMMITTED TO SERVING HAMPTON ROADS NORFOLK - VIRGINIA BEACH - CHESAPEAKE - SUFFOLK - PORTSMOUTH - HAMPTON - NEWPORT NEWS

**USE THIS MENU TO LOCATE MORE TIPS FOR EVERYDAY MATH**

- Calculating for Contractors (Estimating Tips, Mark up & Gross Profit)
- Calculating Area & Volume for Geometric Shapes
- Calculating & Estimating Concrete Slabs & Masonry Blocks
- Calculating Brick, Concrete, Footers, and Mortar
- Composite Decks Vs. Pressure Treated Wood
- Calculating Paint & Wallpaper
- Calculating Roofs & Gables (Waste Factors, Felt, Shingles, Nails Etc.)
- Calculating Wall Studs, Drywall, Ready Mix, Tape, Joint Compound, Nails & Screws.
- Calculating Wall Tile & Floor Tile
- Calculating Stairs, Stair Runs, Risers & Stair Terminology
- Calculating Slopes, Soil, Fill Material, Excavation Tips & Color Code for Underground lines

- Add the total linear feet of footings.
- Multiply the linear foot by the width of the footings.
- Multiply the area by the depth of the footing.
- Divide the Cubic Feet by 27.

**Using the Formula**

**Using the Table**

- Identify the factor in the table based on the depth and width of the footings you are working with.
- Multiply the Linear foot by the factor to determine how many cubic yards of concrete you will need for your footing.

**Quantity Of Standard Block Needed For Specified SQ / FT**

**Determine the Number of Courses**

Height (Feet) รท .67 & round to the next whole number

- Add the total Linear Feet of walls to be blocked.
- Multiply the total Linear Feet by the Height of the building to determine Area to be blocked.
- Subtract the total square feet of all openings from the area.
- Multiply the area by 1.125.

*Example: *Calculate the block needed for a wall that is 50' long, 10' high, with 80 square feet of openings.

- 50'
- 50' x 10' = 500 SF
- 500 - 80 = 420
- 420 x 1.125 = 473 (Rounded up)

**Calculating the Number of Block Quantity**

**Block Multiplier**

- Add 3/8" Mortar joint to block dimensions =16" x 8"=128"
- 16" x 8" = 128" (Face area of the block)
- 144 / 128 = 1.125 (144 is the square foot) 1.125 Blocks per SF

*Example: *How many CF of mortar is needed to install 7600 Bricks? Wall thickness is 4" & the joint is 1/8".

- Go to 1/8" (Above)
- Follow across to 4" for your wall thickness.
- The multiplier is 2.9
- 7600 / 1000 = 7.6
- 2.9 X 7.6 = 22.04 CF of mortar.

- Find the joint thickness.
- Find the thickness of the wall.
- Locate the multiplier that corresponds with step 1 & 2.
- Divide the total amount of bricks you are installing by 1000.
- Use the multiplier in step 3 and multiply the number from step 4. This will give you the CF of mortar needed.

**Mortar for Standard Size Brick**

*Example:*

Calculate the quantity of brick to be installed on 4000 sq/ft. You are installing a common brick with 1/4" joint. You will multiply 4000 x 7 to find that you will need 28,000 bricks.

**Identify the size of your mortar joint**

- Find the number according to your brick size below.
- Multiply your number by the area for which you will be installing the brick.
- The result is the number of bricks you will require.

**Calculating Quantity of Brick**

- Add one side of the brick mortar joint to face the dimensions of the brick.
- Multiply the Length of the brick by the Height to find the face area. (Sq Inches)
- Divide 144 sq inches by the face area. (this is the multiplier - how many bricks you will need per sq. ft.)
- Calculate the area of space for installing brick - Remember to minus space for openings (Doors, Windows, Ect.)
- Multiply the area using the brick multiplier (Below).
- Add 5-10% for waste depending on the overall size of the job.