{
    "name": "Adhesive Coverage Calculator",
    "url": "https://calculators.geekmidst.com/calculators/adhesive-coverage-calculator",
    "markdown": "https://calculators.geekmidst.com/calculators/adhesive-coverage-calculator.md",
    "category": "Construction",
    "description": "Work out how much tile, flooring or wall adhesive an area needs from the consumption rate on the datasheet, with waste, and how many packs to buy.",
    "summary": "Adhesive quantity is the area times the consumption rate on the product datasheet, plus a waste allowance. The rate depends on trowel notch size and substrate, so take it from the product.",
    "also_called": [
        "Tile adhesive calculator",
        "Glue coverage 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": "area",
            "label": "Area to cover",
            "type": "number",
            "default": "25",
            "unit": "m²"
        },
        {
            "name": "rate",
            "label": "Consumption rate",
            "type": "number",
            "default": "4",
            "unit": "kg or L per m²"
        },
        {
            "name": "waste",
            "label": "Waste allowance",
            "type": "number",
            "default": "10",
            "unit": "%"
        },
        {
            "name": "pack_size",
            "label": "Pack size",
            "type": "number",
            "default": "20",
            "unit": "kg or L"
        }
    ],
    "outputs": [
        {
            "key": "packs",
            "label": "Packs to buy",
            "format": "integer"
        },
        {
            "key": "quantity",
            "label": "Adhesive needed",
            "format": "number"
        },
        {
            "key": "coverage_per_pack",
            "label": "Coverage per pack (no waste)",
            "format": "number"
        }
    ],
    "formula": {
        "text": "Quantity = Area × Rate × (1 + waste);  Packs = ⌈Quantity ÷ Pack size⌉",
        "variables": {
            "Rate": "consumption per m² from the datasheet",
            "waste": "allowance for spillage and the last unusable mix"
        }
    },
    "worked_example": {
        "inputs": {
            "area": "25",
            "rate": "4",
            "waste": "10",
            "pack_size": "20"
        },
        "steps": [
            "Quantity = 25 × 4 × 1.10 = 110 kg.",
            "Packs = 110 ÷ 20 = 5.5 → 6 bags.",
            "Each bag covers 20 ÷ 4 = 5 m² before waste."
        ],
        "result": "25 m² at 4 kg/m² with 10% waste needs 110 kg of adhesive, or 6 bags of 20 kg."
    },
    "interpretation": "Large-format tiles and uneven floors often need back-buttering or a bigger notch, which raises consumption; check the datasheet for those cases.",
    "assumptions": [
        "Rate and pack size use the same unit."
    ],
    "limitations": [
        "Primer, levelling compound and grout are not included."
    ],
    "rules": null,
    "faqs": [
        {
            "question": "Why does the trowel size matter?",
            "answer": "A larger notch leaves a thicker bed, so more adhesive per m². Datasheets list the rate for each notch size."
        },
        {
            "question": "Can I use leftover adhesive later?",
            "answer": "Opened powder adhesive keeps for a limited time if sealed and dry; mixed adhesive must be used within its pot life."
        }
    ],
    "sources": [],
    "related": [
        {
            "name": "Carpet Roll Quantity Calculator",
            "url": "https://calculators.geekmidst.com/calculators/carpet-roll-quantity-calculator"
        },
        {
            "name": "Material Waste Rate Calculator",
            "url": "https://calculators.geekmidst.com/calculators/material-waste-rate-calculator"
        },
        {
            "name": "Wallpaper Roll Count Calculator",
            "url": "https://calculators.geekmidst.com/calculators/wallpaper-roll-count-calculator"
        }
    ],
    "disclaimer": "Quantities are estimates. Confirm requirements with your engineer or supplier before ordering materials.",
    "publisher": "GM¹X CalcVerse"
}