Enter the variety of bricks or blocks listed below to calculate how numerous bags of mortar will be needed, or exactly how much products will be needed to mix on-site.

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How to calculation Mortar for Block Projects

Follow 3 easy measures to estimate the quantity of mortar mix necessary for her concrete block project.

Step One: calculation Square Footage

Estimate the square footage of the wall by measure up the width and also height in feet. Then, main point the width and also height to find the square footage. Shot calculating square footage making use of a calculator if you’re no comfortable doing that by hand.

Step Two: calculate the number of Blocks

Next, calculation the variety of blocks essential for the project by the variety of blocks per square foot. You’ll need around 1 1/8 traditional blocks per square foot, so main point the square footage by 1.125 to estimate the full needed. Girlfriend can also use ours block calculator to calculate other block sizes.

Step Three: calculation Mortar

The final step will be to find the productivity of the mortar you’re using and also divide the total number of blocks by the yield. The usual 80-pound bag of mortar will certainly yield 12 blocks so you can calculate by dividing the square clip by 12.

Coverage because that mortar mixes and also various amounts of blocks.Block Quantity60 lb Bags80 lb Bags
100 blocks12 bags9 bags
200 blocks23 bags17 bags
300 blocks34 bags25 bags

How to calculation Mortar for Brick Projects

The very same three steps above can be used to estimate mortar for brick projects.

Step One: estimate Square Footage

Start by estimating the square clip of the brick wall by multiplying the width by the elevation together.

Step Two: calculate the number of Bricks

Then, calculation the number of bricks by multiply the square clip by the variety of bricks per square feet. Our brick calculator can help with this. You’ll need approximately 6.9 modular bricks every square foot, so multiply 6.9 time the square clip to discover the variety of bricks needed.

Step Three: calculation Mortar

Finally, calculation the mortar required by splitting the total variety of bricks through the productivity of the mix used. On typical a mortar mix will certainly yield 36 bricks every 80-pound bag, so divide the total number of bricks by 36 to calculation the bags needed.

Coverage for mortar mixes and also various amounts of bricks.Brick Quantity60 lb Bags80 lb Bags
500 bricks19 bags14 bags
1,000 bricks38 bags28 bags
1,500 bricks56 bags42 bags

Types of Mortar

Whether you’re using a pre-mixed mortar or mix on-site, it’s vital to understand the various types there are and which is suitable for her project. Cement come sand ratio arrays from 1 component cement to 3 to 4.5 components sand, relying on the form of mortar being mixed and the compressive toughness desired.

Most mixes additionally require the usage of lime in miscellaneous proportions as a binding agent, to increase the longevity of the perfect product, and to boost the workability the the mix.


Type O

used in over ground applications that space not load-bearing, generally for internal applications, and has a compressive toughness of 350psi.


Type N

used in over ground applications that support light loads, normally for chimneys or brick-work, and has a compressive stamin of 750psi.


Type S

used in listed below ground applications for fill bearing applications, typically for foundations and also retaining walls, and also has a compressive stamin of 1,800psi.


Type M

used in listed below ground applications for heavier pack bearing applications, typically for foundations to support , and has a compressive stamin of 2,500psi.


This table mirrors the recommended mix proportions and compressive stamin for various species of mortar.

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Mortar TypeCement : Lime : Sand RatioCompressive Strength
Type O1:2:9350 psi
Type N1:1:6750 psi
Type S2:1:91,800 psi
Type M3:1:122,500 psi

Try our various other gravel calculator to estimate the amount of sand needed for your mix.