Brick and Mortar Quantity Estimator

For a standard modular brick wall with a three-eighths inch mortar joint, you need approximately seven bricks per square foot. This baseline number changes to about four and a half bricks per square foot if you are using larger utility-size bricks. Multiply your gross square footage by these factors before adding your standard waste allowance.

You will need about seven to eight bags of standard 80-pound pre-mixed mortar to lay 1,000 modular bricks with a standard three-eighths inch joint. If you are mixing your own sand and cement, this translates to roughly one ton of sand and ten bags of masonry cement. Using larger block sizes will reduce the total number of joints and decrease the overall mortar volume.

Add a flat five percent waste factor for straightforward, straight-run walls with minimal corners. For complex layouts featuring arches, chimneys, or numerous window openings requiring custom cuts, increase this waste factor to ten percent. This margin prevents costly job stoppages while keeping excess material storage to a minimum.

Calculate the square footage of each wythe, or layer, independently to account for different brick types or structural block backings. Multiply the inner structural block wall and the outer face brick wall as separate runs, then add your mortar requirements for both layers plus the collar joint between them. Be sure to include metal wall ties spaced every sixteen inches vertically and thirty-two inches horizontally.