{
    "name": "Brick Quantity Calculator",
    "url": "https://calculators.geekmidst.com/calculators/brick-quantity-calculator",
    "markdown": "https://calculators.geekmidst.com/calculators/brick-quantity-calculator.md",
    "category": "Construction",
    "description": "Count the bricks for a wall from its length, height, openings, brick size and joint thickness, with mortar volume and a waste allowance. Metric or imperial.",
    "summary": "Each brick plus one mortar joint covers a fixed patch of wall. Divide the net wall area by that patch, multiply by the number of bricks through the thickness, and add a waste allowance.",
    "also_called": [
        "Brick estimator",
        "Brickwork calculator"
    ],
    "applies_to": "Worldwide",
    "last_updated": "2026-10-29",
    "computation": "Results are computed in the visitor’s browser on the HTML page. This API describes the calculator; it does not compute results.",
    "inputs": [
        {
            "name": "units",
            "label": "Units",
            "type": "segmented",
            "default": "metric",
            "options": {
                "metric": "Metric",
                "imperial": "Imperial"
            }
        },
        {
            "name": "length",
            "label": "Wall length",
            "type": "number",
            "default": "5"
        },
        {
            "name": "height",
            "label": "Wall height",
            "type": "number",
            "default": "3"
        },
        {
            "name": "openings",
            "label": "Doors and windows (total area)",
            "type": "number",
            "default": "2",
            "optional": true
        },
        {
            "name": "wythes",
            "label": "Bricks through the wall thickness",
            "type": "number",
            "default": "1"
        },
        {
            "name": "brick_length",
            "label": "Brick length",
            "type": "number",
            "default": "190"
        },
        {
            "name": "brick_height",
            "label": "Brick height",
            "type": "number",
            "default": "90"
        },
        {
            "name": "brick_width",
            "label": "Brick width (bed depth)",
            "type": "number",
            "default": "90"
        },
        {
            "name": "joint",
            "label": "Mortar joint thickness",
            "type": "number",
            "default": "10"
        },
        {
            "name": "waste",
            "label": "Waste allowance",
            "type": "number",
            "default": "5",
            "unit": "%",
            "optional": true
        }
    ],
    "outputs": [
        {
            "key": "bricks",
            "label": "Bricks to buy (with waste)",
            "format": "integer"
        },
        {
            "key": "bricks_net",
            "label": "Bricks laid (no waste)",
            "format": "number"
        },
        {
            "key": "bricks_per_m2",
            "label": "Bricks per m² of wall",
            "format": "number"
        },
        {
            "key": "wall_area_m2",
            "label": "Net wall area",
            "format": "number"
        },
        {
            "key": "wall_area_ft2",
            "label": "Net wall area",
            "format": "number"
        },
        {
            "key": "mortar_m3",
            "label": "Wet mortar (with waste)",
            "format": "number"
        },
        {
            "key": "mortar_ft3",
            "label": "Wet mortar (with waste)",
            "format": "number"
        }
    ],
    "formula": {
        "text": "Bricks = (L × H − Openings) ÷ [(l + j)(h + j)] × Leaves × (1 + Waste);  Mortar = (Wall volume − Bricks laid × l × h × w) × (1 + Waste)",
        "variables": {
            "L, H": "wall length and height",
            "l, h, w": "brick length, height and width",
            "j": "mortar joint thickness",
            "Leaves": "bricks through the thickness; wall thickness = Leaves × w + (Leaves − 1) × j"
        }
    },
    "worked_example": {
        "inputs": {
            "units": "metric",
            "length": "5",
            "height": "3",
            "openings": "2",
            "wythes": "1",
            "brick_length": "190",
            "brick_height": "90",
            "brick_width": "90",
            "joint": "10",
            "waste": "5"
        },
        "steps": [
            "Net area = 5 × 3 − 2 = 13 m².",
            "Each brick with its joint covers 0.20 × 0.10 = 0.02 m², so 50 bricks per m².",
            "Bricks laid = 13 × 50 = 650; with 5% waste, 682.5 → 683 bricks.",
            "Mortar = 13 × 0.09 − 650 × 0.19 × 0.09 × 0.09 = 0.170 m³, ×1.05 = 0.178 m³ wet."
        ],
        "result": "A 5 × 3 m single-leaf wall with 2 m² of openings needs about 683 bricks and 0.18 m³ of wet mortar."
    },
    "interpretation": "Order whole packs above the \"bricks to buy\" figure, and keep a few spare from the same batch for later repairs. To turn the mortar volume into cement and sand, use the Sand Quantity for Mortar Calculator.",
    "assumptions": [
        "Stretcher bond with full mortar joints on every face; the cross-joint between leaves is filled.",
        "The waste allowance applies to both bricks and mortar."
    ],
    "limitations": [
        "Frogged or perforated bricks take more mortar than solid ones.",
        "Piers, returns, corners and special bonds (English, Flemish) are not modelled separately."
    ],
    "rules": null,
    "faqs": [
        {
            "question": "How many bricks are in 1 m² of wall?",
            "answer": "For a single leaf: 1 ÷ [(brick length + joint) × (brick height + joint)]. That is 50 for a 190 × 90 mm brick with 10 mm joints and about 60 for a UK 215 × 65 mm brick."
        },
        {
            "question": "What waste allowance should I use?",
            "answer": "5% is a common starting point for plain walls; use more for lots of cuts, fragile bricks or reclaimed stock."
        }
    ],
    "sources": [],
    "related": [
        {
            "name": "Sand Quantity for Mortar Calculator",
            "url": "https://calculators.geekmidst.com/calculators/sand-quantity-for-mortar-calculator"
        },
        {
            "name": "Wall Plastering Quantity Calculator",
            "url": "https://calculators.geekmidst.com/calculators/wall-plastering-quantity-calculator"
        },
        {
            "name": "Cement Bags for Concrete Calculator",
            "url": "https://calculators.geekmidst.com/calculators/cement-bags-for-concrete-calculator"
        },
        {
            "name": "Concrete Calculator",
            "url": "https://calculators.geekmidst.com/calculators/concrete-calculator"
        }
    ],
    "disclaimer": "Quantities are estimates. Confirm requirements with your engineer or supplier before ordering materials.",
    "publisher": "GM¹X CalcVerse"
}