Brick Calculator
This brick calculator tells you how many bricks a wall needs. Enter the length and height, set the brick face size, note any openings and a waste margin, and you'll get the bricks, mortar bags, and cost. Everything updates as you type, so it's easy to plan a garden wall, a veneer, or a brick planter. It's free and runs in your browser, so pricing a brickwork job takes seconds.
- Bricks for a wall
- Mortar bags
- Wall area
- Subtracts openings
- Cost estimate
Last updated June 17, 2026 Feet, by wall area Reviewed by the Calcowa team
Enter a wall size and brick size above zero.
A modular brick has an 8 by 2.67 inch face, about 0.148 sq ft, so roughly 6.75 bricks cover a square foot. Mortar runs about 7 bags per 1,000 bricks. Leave the price blank to skip the cost line.
How do you calculate how many bricks you need?
Brick walls go up course by course, so the job is to turn a wall into bricks, and it's not as fiddly as it sounds. First you find the wall area: the length times the height in feet. Take off any door and window openings, since you won't lay brick there, then add a waste margin, usually about 10 percent, because bricks chip and snap when they're cut. Now divide that area by the face of one brick. A standard modular brick face covers about 0.148 square feet with its mortar joint, so you get roughly 6.75 bricks per square foot, and you round up. This tool runs every step, so you'll get a brick count, a mortar estimate, and a cost the moment you type the wall size, and you don't have to count courses by hand. If you're only facing a short planter, that's fine too, since you can drop the height right down.
Estimating a wall, step by step
Here's the quick routine before you order, and it's just three steps:
- 1
Enter the wallType the length and height, and any openings.
- 2
Set brick and wasteChoose the brick face size and a waste margin.
- 3
Read the bricksSee the bricks, mortar bags, and cost you'll need.
Bricks by wall area
Here's a rough guide for standard modular bricks and 10 percent waste. It's a starting point, so don't treat it as exact, since your brick size and openings won't match every job. When you're ready, run your own numbers above.
| Wall | Wall sq ft | Bricks |
|---|---|---|
| 10 x 5 ft | 50 | 372 |
| 10 x 8 ft | 80 | 594 |
| 12.5 x 8 ft | 100 | 743 |
| 25 x 8 ft | 200 | 1,485 |
Frequently asked questions
You enter the wall size, the brick face size, and a small waste margin, and it works out the bricks, mortar, and cost. It finds the wall area from the length and height, subtracts any door or window openings, adds the waste, then divides by the face area of one brick. Everything runs in your browser, so you'll see the brick count change as you adjust a number, and you can copy the result to take to the supplier.
Find the wall area in square feet, take off the openings, add about 10 percent for waste, then divide by the face of one brick. A standard modular brick covers roughly 0.148 square feet of wall with the mortar joint, which works out to about 6.75 bricks per square foot. An 80 square foot wall needs around 594 bricks once you allow for waste, and the calculator does that math the moment you type the wall size.
For a standard modular brick, it's about 6.75 to 7 bricks per square foot, since one brick face covers roughly 0.148 square feet including the mortar joint. A taller brick like an engineer or utility size covers more, so it drops to 5 or even 3 per square foot. That's why this tool lets you set the face size yourself, and the per-square-foot figure shifts as you change it, with the brick count following along.
A rough rule is about 7 bags of mortar per 1,000 modular bricks, so a 600 brick wall takes around 5 bags. That covers a standard 3/8 inch joint with a premixed mason mortar, though wider joints, larger bricks, and cold weather all change it. The calculator gives you a mortar estimate from the brick count, but treat it as a starting point and grab a spare bag, since mixing more mid-wall slows the whole job.
Yes, a small surplus is smart, because bricks chip in transit, snap when they're cut, and a few always arrive damaged. The waste margin here defaults to 10 percent, which is normal for brickwork, but bump it higher for a wall with lots of corners, arches, or cuts around openings. Bricks from a later batch can differ in color, so it's far better to keep a few spare than to chase the same blend on a second trip.
Yes, it's completely free, with no sign-up, and it runs right in your browser, so nothing you enter leaves your device. Type the wall size, set the brick and waste, and read the bricks in a tap. Bookmark it for a garden wall, a veneer, or a brick planter, and you'll have a solid brick estimate whenever you plan a brickwork project.
Related tools
More construction and masonry tools.
Concrete, framing, and material.
Concrete Block CalculatorBlocks and mortar for a wall.
Square Footage CalculatorArea of a wall or whole project.
Building a brick wall?
Work out the bricks above, then size the footing concrete.