Construction and repair materials calculator for website

Construction Materials Calculator Development on Website

A construction materials calculator is applied geometry plus a normative consumption database. Users enter room or structure dimensions, and the calculator computes the material quantity with reserve, cost, and a shopping list.

Typical Calculation Tasks

• Wallpaper — wall area minus doors and windows, number of strips by height and roll width, pattern alignment
• Tiles — coverage area, tile quantity accounting for cutting and waste, adhesive and grout consumption
• Plaster / putty — surface area × layer thickness × density
• Brick / blocks — masonry volume ÷ unit volume + mortar
• Laminate / parquet — floor area + 10–15% waste for cutting, laying direction affects consumption
• Paint — area × number of coats ÷ consumption per m² (from paint specifications)

Wallpaper Calculation

function calcWallpaper(params) {
  const {
    roomLength,    // m
    roomWidth,     // m
    ceilingHeight, // m
    rollWidth,     // m, typically 0.53 or 1.06
    rollLength,    // m, typically 10 or 15
    patternRepeat, // m, 0 if no pattern
    doors,         // array { width, height }
    windows,       // array { width, height }
  } = params;

  // Wall perimeter
  const perimeter = 2 * (roomLength + roomWidth);

  // Subtract openings (only if > 0.5 m²)
  const openingsArea = [
    ...doors.map(d => d.width * d.height),
    ...windows.map(w => w.width * w.height),
  ]
    .filter(a => a > 0.5)
    .reduce((s, a) => s + a, 0);

  // Strips accounting for pattern
  const effectiveHeight = patternRepeat > 0
    ? Math.ceil(ceilingHeight / patternRepeat) * patternRepeat
    : ceilingHeight;

  const stripsPerRoll = Math.floor(rollLength / effectiveHeight);
  const totalStrips = Math.ceil(perimeter / rollWidth);

  // Adjust for openings: remove strips fully in opening
  const savedStrips = Math.floor(openingsArea / (rollWidth * ceilingHeight));

  const netStrips = Math.max(0, totalStrips - savedStrips);
  const rolls = Math.ceil(netStrips / stripsPerRoll);

  return {
    rolls,
    totalStrips: netStrips,
    wallArea: perimeter * ceilingHeight - openingsArea,
  };
}

Tile Calculation

function calcTiles(params) {
  const {
    areaM2,        // area in m²
    tileWidth,     // mm
    tileHeight,    // mm
    groutWidth,    // mm, joint width
    wastePercent,  // % reserve (5–15%)
  } = params;

  const tileW = (tileWidth + groutWidth) / 1000; // to meters
  const tileH = (tileHeight + groutWidth) / 1000;
  const tileArea = tileW * tileH;

  const tilesNet = areaM2 / tileArea;
  const tilesWithWaste = Math.ceil(tilesNet * (1 + wastePercent / 100));

  // Adhesive consumption: ~4–6 kg/m² at 6mm application thickness
  const adhesiveKg = Math.ceil(areaM2 * 5); // average consumption

  // Grout consumption: depends on tile size and joint width
  const groutKg = Math.ceil(areaM2 * (groutWidth / tileWidth) * 0.7 * 2);

  return {
    tiles: tilesWithWaste,
    tilesNet: Math.ceil(tilesNet),
    adhesiveKg,
    groutKg,
  };
}

Multi-Room Calculator

For whole-apartment renovation, you need a list of rooms with separate parameters:

function MultiRoomCalculator() {
  const [rooms, setRooms] = useState([
    { id: 1, name: 'Living Room', length: 5, width: 4, height: 2.7 },
  ]);

  const addRoom = () => setRooms(prev => [
    ...prev,
    { id: Date.now(), name: `Room ${prev.length + 1}`, length: 3, width: 3, height: 2.7 },
  ]);

  const totalArea = rooms.reduce((s, r) => s + r.length * r.width, 0);

  return (
    <div>
      {rooms.map(room => (
        <RoomForm
          key={room.id}
          room={room}
          onChange={(updated) =>
            setRooms(prev => prev.map(r => r.id === room.id ? updated : r))
          }
          onRemove={() =>
            setRooms(prev => prev.filter(r => r.id !== room.id))
          }
        />
      ))}
      <button onClick={addRoom}>+ Add Room</button>
      <div className="total">Total Area: {totalArea.toFixed(1)} m²</div>
      <MaterialsSummary rooms={rooms} />
    </div>
  );
}

Shopping List

function MaterialsSummary({ rooms, selectedMaterial }) {
  const totals = rooms.reduce((acc, room) => {
    const result = calcMaterial(selectedMaterial, room);
    for (const [key, val] of Object.entries(result)) {
      acc[key] = (acc[key] || 0) + val;
    }
    return acc;
  }, {});

  return (
    <table className="materials-list">
      <thead>
        <tr><th>Material</th><th>Quantity</th><th>Unit</th></tr>
      </thead>
      <tbody>
        {Object.entries(totals).map(([key, val]) => (
          <tr key={key}>
            <td>{materialLabels[key]}</td>
            <td>{val}</td>
            <td>{materialUnits[key]}</td>
          </tr>
        ))}
      </tbody>
    </table>
  );
}

Product Catalog Integration

A powerful option — the calculator is linked to the store catalog. Calculate quantity → see specific SKUs with prices → add to cart:

async function fetchProducts(materialType, quantity) {
  const res = await fetch(`/api/products?category=${materialType}&min_pack_size=${quantity}`);
  return res.json();
}

Estimate Export

Users want to print a shopping list or send it to the foreman:

function exportToPDF(materials, rooms) {
  // Use jsPDF + autoTable
  import('jspdf').then(({ jsPDF }) => {
    import('jspdf-autotable').then(() => {
      const doc = new jsPDF();
      doc.setFont('helvetica');
      doc.text('Materials Estimate', 14, 20);
      doc.autoTable({
        head: [['Material', 'Qty', 'Unit']],
        body: materials.map(m => [m.name, m.qty, m.unit]),
        startY: 30,
      });
      doc.save('estimate.pdf');
    });
  });
}

For Cyrillic in jsPDF, you need to add a TTF font via doc.addFileToVFS + doc.addFont.

Timeframe

Single material type calculator (wallpaper or tiles) with basic parameters — 2–3 working days. Multi-room calculator with multiple material types, shopping list, catalog integration, and PDF export — 7–10 days.