Brick Calculator
Bricks and mortar
Results
| Wall area | — |
|---|---|
| Bricks needed | — |
| Total bricks (with wastage) | — |
| Cost of bricks | — |
| Dry mortar volume | — |
| Cement (dry volume) | — |
| Sand (dry volume) | — |
| Cement bags | — |
Nothing stalls a masonry job faster than running out of brick mid-course while the mud on the board starts to stiffen. I have watched crews round down a wall estimate, skip wastage, and then burn half a day waiting on a partial pallet delivery because someone forgot that every window head and corner eats whole units in cuts. This calculator turns wall dimensions, brick size, and joint thickness into a count you can actually order—then optional mortar math so you are not guessing bag counts at the rental counter.
How to Use This Brick Calculator
- Choose wall type. Single wythe for a standard veneer or one-brick-thick partition. Double wythe doubles the face count for two parallel leaves (common in insulated cavity walls).
- Enter wall size. Use length and height, or switch to total wall area if you already measured ft² or m² on a takeoff sheet.
- Set brick dimensions. Pick a preset (US modular, US standard, or UK standard) or type custom length, height, width, and mortar joint thickness.
- Add wastage. Enter a breakage and cut allowance—5% for simple runs, 10% when openings and corners dominate.
- Optional cost and mortar. Enter price per brick for a materials subtotal. Check mortar materials to split dry volume into cement and sand for a selected mix ratio and bag size.
- Click Calculate. Results update in the table; mortar rows appear only when that option is enabled.
For rectangular footprints before you stand walls, confirm area with the Square Footage Calculator. If the project also needs a concrete footing or bond beam, run the Concrete Calculator on that pour separately. Interior tile on a different phase of the job maps to the Tile Calculator.
Brick Calculator Formulas and Practical Applications
Think of each brick on the wall face as occupying a rectangle that includes its share of mortar—a slightly larger tile than the brick body alone. You are tiling the wall with those effective rectangles, not with bare brick faces.
Wall Area = L × H (or enter area directly)
Bricks per wythe = Wall Area ÷ ((l + t) × (h + t))
Total Bricks = Bricks per wythe × Wythes × (1 + Wastage ÷ 100)
Here L and H are wall length and height, l and h are brick length and height, and t is mortar joint thickness—all in the same length unit before the tool converts internally. Double wythe uses two face counts worth of brick. The result rounds up to whole bricks because suppliers sell full units.
Example: a 20 ft × 8 ft wall (160 ft²) with US modular brick (7.625 in × 2.25 in) and 3/8 in joints gives an effective face of about 8 in × 2.625 in, or roughly 6.9 bricks per ft²—about 1,100 bricks on one wythe before wastage. Add 5% and you are near 1,160 on the order ticket.
Mortar volume is estimated from wall depth: face area times brick width (times two for double wythe) minus the solid volume of all bricks. Dry mix volume applies a bulking factor, then splits by your cement-to-sand ratio. That is a planning estimate—batch plants, pre-mixed bags, and site humidity change real consumption. Toggle the mortar section when you need bag counts for a 1:5 site mix, not when you are buying pre-blended Type S in bags.
Standard Units and Conversion Tables
Common brick formats and joint notes used in the presets:
| Format | Typical actual size | Notes |
|---|---|---|
| US modular | 7.625 in × 2.25 in × 3.625 in | Most common veneer; 3/8 in joint → 8 in × 2.667 in nominal face |
| US standard | 8 in × 2.25 in × 3.75 in | Slightly deeper unit; check regional availability |
| UK standard | 215 mm × 65 mm × 102.5 mm | 10 mm joint common in metric takeoffs |
| Wastage | 5–10% single wythe | Increase for arches, chimneys, and heavy cut work |
| Mortar mix | 1:3 to 1:6 cement:sand | 1:5 is a typical site blend for general-purpose walls |
Wall inputs accept feet, meters, inches, or yards. Area mode accepts ft², m², or yd². Brick dimensions accept inches, millimeters, centimeters, or feet.
Frequently Asked Questions
How many bricks per square foot of wall?
With standard US modular brick and 3/8 in mortar joints, plan on about 6 to 7 bricks per ft² of face on one wythe. Larger bricks cover more area each, so the count drops. Run your exact l, h, and t through the calculator instead of using a rule of thumb on mixed sizes.
How do I calculate how many bricks I need?
Divide wall area by the mortar-inclusive face area (l + t)(h + t), multiply by the number of wythes, then inflate by wastage. That is the same sequence as manual scratchpad math—this tool just keeps units consistent so you do not mix inches on brick with feet on wall height.
How much cement do I need for 1000 bricks?
It depends on joint thickness, brick depth, and mix ratio. On a 1:5 cement-to-sand blend, 1000 modular bricks often land near 1 to 2 cubic feet of cement powder and several cubic feet of sand dry volume—enable the mortar section here with your wall type and dimensions for a closer order list, then round up bags at the supplier.
Should I use single or double wythe?
Single wythe suits many veneers and garden walls. Double wythe matches structural cavity walls with two brick leaves. Select double in the calculator when both leaves are brick—insulation in the cavity does not add brick count, but the second leaf doubles units and roughly doubles mortar in this estimate.
For retaining wall footprint tables, mortar joint nominal face math, and a 10% waste cushion walkthrough, see our retaining wall brick estimate guide.
Disclaimer. RapidRatio is informational—not structural engineering or masonry specification. Confirm counts with your supplier, local code, and a qualified mason for load-bearing work.