Bricks and Mortar Calculator: Bricks, Bags & Cost (2026)
Estimate the number of bricks, mortar bags, and total material cost for any brick wall, veneer, or garden project. Select your brick size, mortar joint width, and wall dimensions — results update instantly.
Formula verified: (Wall Area ÷ Brick Face Area) × Waste Factor = Bricks Required. Mortar bags calculated from joint volume. 2026 pricing.
Bricks and mortar calculator
How to calculate bricks and mortar
Brick quantity estimation uses wall face area, brick face area, and a mortar joint allowance. The mortar joint increases the effective face area of each brick — a standard 3⅝ × 2¼-inch brick with a ⅜-inch joint covers approximately 4 × 2⅝ inches of face area including the joint. Every estimator works from the same base formula:
Bricks Required = (Wall Area ÷ Brick Face Area incl. Joint) × Waste Factor
Mortar Bags = (Joint Volume ÷ 0.45 cu ft per 60-lb bag) × 1.15 waste
Wall Area = Length × Height − Opening Deductions
Brick counts per square foot vary by size. Standard and modular bricks run approximately 6.75–7 bricks per sq ft. Queen bricks cover more face area and require only 5.1 per sq ft. Always use the manufacturer's specified unit count — minor dimensional variations between suppliers change totals meaningfully on large projects.
Step-by-step brick and mortar estimation
- 1Measure wall area. Multiply wall length × height to get gross area in square feet. Measure each wall segment separately — combining irregular walls into one figure introduces rounding errors.
- 2Deduct openings. Subtract the area of all doors and windows from gross area to get net brick area. For arched openings, calculate the area of the rectangular bounding box and subtract — the bricks cut away from the arch are still wasted.
- 3Multiply by brick count per sq ft. Use the manufacturer's stated brick count for your selected size and joint width. Standard brick at ⅜-inch joint = 6.75 bricks per sq ft. Queen brick = 5.1 per sq ft.
- 4Add waste factor. Add 10% for standard work, 15% for cuts, corners, and arches. A 10% waste allowance on 1,000 bricks means ordering 1,100 — always round up to the nearest full pallet to avoid a costly reorder for a partial pallet.
- 5Calculate mortar. A standard rule of thumb is 1 bag of 60 lb mortar per 35–40 bricks for a single-wythe wall with ⅜-inch joints. For a more precise figure, calculate joint volume: joint cross-section area × total joint length, then divide by 0.45 cu ft per 60 lb bag.
Brick sizes and units per square foot (2026)
| Brick type | Nominal size (W × H × L) | Bricks per sq ft | Mortar bags per 100 sq ft | Cost per brick (2026) |
|---|---|---|---|---|
| Standard | 4 × 2⅔ × 8 in | 7.0 | ~7 | $0.50 – $0.90 |
| Modular | 4 × 2⅔ × 8 in | 6.75 | ~7 | $0.50 – $0.90 |
| Queen | 3⅛ × 2¾ × 9⅝ in | 5.1 | ~5.5 | $0.65 – $1.10 |
| King | 3 × 2¾ × 9⅝ in | 4.8 | ~5 | $0.65 – $1.15 |
| Jumbo Modular | 4 × 2¾ × 8 in | 5.8 | ~6 | $0.60 – $1.00 |
| Roman | 4 × 1⅝ × 12 in | 6.0 | ~6.5 | $0.70 – $1.20 |
| Norman | 4 × 2¾ × 12 in | 4.5 | ~4.5 | $0.75 – $1.25 |
Prices above are for standard face brick without delivery. Specialty brick (tumbled, glazed, reclaimed) runs $1.50–$4.00+ per brick. Always request a delivered price — freight adds $80–$200 per pallet depending on distance.
Mortar types and mix ratios
Mortar type determines the strength and flexibility of the joint. Over-specifying mortar strength is a common error — mortar that is stronger than the brick will cause the brick to crack under thermal movement rather than allowing the joint to flex and repair.
| Mortar type | Cement : Lime : Sand | Compressive strength | Best application |
|---|---|---|---|
| Type S | 1 : 0.5 : 4.5 | 1,800 psi | Below grade, retaining walls, exterior exposed |
| Type N | 1 : 1 : 6 | 750 psi | Above-grade exterior walls, veneer — most common |
| Type M | 1 : 0.25 : 3.75 | 2,500 psi | Foundations, manholes, below-grade masonry |
| Type O | 1 : 2 : 9 | 350 psi | Interior non-load-bearing, historical repointing |
Tip: Type N mortar is the correct choice for most above-grade brick veneer and exterior wall work. Type S is required below grade and in areas subject to freeze-thaw cycles. Never use Type M mortar for face brick — the high cement content causes surface spalling on softer brick over time.
Mortar coverage: how many bags per 1,000 bricks
The standard industry rule is 1 bag of 60 lb premixed mortar per 35–40 standard bricks for ⅜-inch joints. For 1,000 standard bricks expect 25–29 bags. For queen or king brick (larger face, fewer joints) the ratio drops to approximately 1 bag per 45–50 bricks.
Quick reference:
1,000 standard bricks at ⅜-inch joint → 25–29 × 60 lb mortar bags
100 sq ft standard brick wall → approx. 7 bags mortar + 1 cu ft sand per bag
Type N mortar: 1 part cement + 1 part lime + 6 parts sand by volume
Bond patterns and their effect on brick count
The bond pattern changes how many bricks are cut on a given wall. Running bond (the most common) has minimal cuts on straight walls. Flemish bond and English bond require header bricks laid perpendicular — these must be counted separately when estimating a double-wythe wall.
| Bond pattern | Waste allowance | Notes |
|---|---|---|
| Running bond (½ offset) | +5–8% | Most common, minimal cuts on straight walls |
| Stack bond (straight joints) | +5% | Not structural — decorative only; requires reinforcement |
| Flemish bond | +10–12% | Alternating headers and stretchers — two wythes required |
| English bond | +10–12% | Alternating full rows of headers and stretchers |
| Herringbone (45°) | +15–20% | High cut waste — diagonal cuts on all perimeter bricks |
Common mistakes in brick and mortar estimation
Using gross area without deducting openings. A wall with 3 standard windows (each 15 sq ft) on a 200 sq ft wall has a 22.5% opening ratio. Failing to deduct these adds 135+ bricks to the order and the cost of those bricks and the mortar to lay them — a material overrun of $150–$300 on a mid-size project.
Under-ordering mortar because of the bag count per brick rule. The 1 bag per 35–40 bricks rule applies to standard ⅜-inch joints on single-wythe walls. Double-wythe construction, collar joints, and wide joints all require significantly more mortar. Always calculate joint volume directly rather than relying solely on the rule-of-thumb ratio.
Ignoring mortar type requirements for the application. Using Type N mortar below grade or in contact with soil causes accelerated deterioration — Type S or Type M is required in these conditions per ASTM C270. Repointing with the wrong mortar type is also a common and expensive error: mortar stronger than the brick forces cracks through the brick face, not the joint.
Not accounting for cuts at openings and corners. Every window, door, and inside/outside corner requires cut bricks. A 10% waste factor covers standard work — use 15% for projects with multiple openings, arches, or corners. Herringbone and diagonal patterns require 15–20% waste allowance regardless of openings.
Mixing mortar too wet or too dry. Correct mortar consistency should hold a peak when worked with a trowel and slide cleanly from the blade — not flow like concrete and not crumble dry. Wet mortar has lower compressive strength and causes staining on brick faces. Dry mortar has poor adhesion and crumbles from joints within 1–2 freeze-thaw cycles.
