Brick & Block Calculator
Enter the wall length and height to get how many bricks or concrete blocks to order, plus a rough mortar estimate.
Wall
Counts include the mortar joint. Deduct large openings from length × height first.
You'll need
Wall area0 sq ft
Bricks
0
~7/sq ft (+10% waste)
Mortar (80 lb bags, approx)0
Mortar is a rough estimate (~1 bag per 125 brick or 33 block) and varies with joint size. Add sand if mixing from type-S.
How to estimate brick and block
Find the wall face area (length × height, minus openings), then multiply by units per square foot — about 7 for modular brick or 1.125 for standard block — and add ~10% for waste. Mortar is estimated per unit.
Take off masonry walls from a scan
ProBuildCalc turns your iPhone's LiDAR scanner into a job-site measuring kit — walk the space and it captures the square footage, material takeoff, and a blueprint automatically. No tape measure, no graph paper.
Brick calculator FAQ
- How many bricks do I need per square foot?
- For standard modular brick with a 3/8-inch mortar joint, plan on about 7 bricks per square foot of wall face. Multiply your wall area by 7 and add ~10% for waste and breakage.
- How many concrete blocks per square foot?
- Standard 8×8×16-inch CMU blocks cover about 1.125 blocks per square foot of wall, since each block face is roughly 0.89 sq ft including the joint.
- How much mortar do I need?
- As a rough guide, one 80 lb bag of mortar lays about 125 modular bricks or about 33 standard blocks. Joint size and mix change this, so buy a little extra.
- Do I subtract doors and windows?
- Yes — calculate the gross wall area (length × height), then subtract the area of any large openings before applying the per-square-foot figure.