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Tile Quantity Calculator

Calculate tile quantity — how many units, bags or pieces you need with waste factor. Enter flooring dimensions to get instant results. Enter dimensions, select units and add waste to get instant, supplier-ready numbers.

1. Measurements & Dimensions

2. Material Properties & Waste Allowance

3. Optional Material Cost

TILE QUANTITY CALCULATOR ESTIMATE
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Enter dimensions above to calculate

Calculation Breakdown & StepsFormula: Rows = ceil((floor width + joint)/(unit width + joint)); columns = ceil((floor length + joint)/(unit length + joint)); units = rows × columns.
  1. Enter values to see step-by-step substitution.

    Engineering Assumptions:

    • Straight rectangular grid. Counts a whole unit for each edge cut and assumes no reuse of offcuts; diagonal layouts and patterns require a separate layout.
    • Allowance covers breakage and spare units after the basic layout count. Expansion perimeter gaps are excluded.
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    What Is This Calculator?

    The Tile Quantity Calculator — Covers US floors — hardwood, laminate, vinyl, carpet and tile with grout and waste.

    What Does It Calculate?

    • Floor area in square feet
    • Boxes or rolls with waste
    • Grout and adhesive

    How to Use the Calculator

    1. Measure Room 12x10 ft, tile 12x12 in, grout 1/8 in — use feet for length/width and inches for thickness where typical.
    2. Enter values and select units. The calculator converts to feet before calculating (inches /12, yards x3).
    3. Adjust waste % and optional price, then click Calculate. Results show with waste included.
    4. Use Reset to clear and try another size.

    Formula & Engineering Methodology

    Rows = ceil((floor width + joint)/(unit width + joint)); columns = ceil((floor length + joint)/(unit length + joint)); units = rows × columns.

    • Area — Floor area ft2
    • Tile area — (W*H)/144 ft2

    All units convert to exact standard engineering dimensions (NIST SP 811) before calculation to ensure consistency between US Customary and Metric measurements.

    Worked Example

    Example: Room 12x10 ft, tile 12x12 in, grout 1/8 in

    STEPVALUE
    Tile + grout12.125*12.125 = 147 in2 = 1.02 ft2
    Tiles120/1.02 = 117.6 -> 118
    With 10% waste130 tiles

    Construction Information

    Material: Tile 12x12 in = 1 ft2, 6.8 per ft2 with grout. Hardwood 20 ft2 per box. Carpet 12 ft wide rolls.

    12x12 tile ~1 ft2, 6x6 ~0.25 ft2. Add 15% for diagonal.

    Material Information

    Tile 12x12 in = 1 ft2, 6.8 per ft2 with grout. Hardwood 20 ft2 per box. Carpet 12 ft wide rolls.

    Waste & Overages

    Add 10% for straight, 15% for diagonal or large tile. Pattern adds 20%.

    Practical Tips

    • Acclimate wood 72 hours
    • Stagger joints 6 in

    Common Mistakes

    • Not adding waste for diagonal — short 15%
    • Forgetting grout joint — count off

    Assumptions & Engineering References

    • Straight rectangular grid. Counts a whole unit for each edge cut and assumes no reuse of offcuts; diagonal layouts and patterns require a separate layout.
    • Allowance covers breakage and spare units after the basic layout count. Expansion perimeter gaps are excluded.

    This calculator provides an estimate based on your inputs. Actual requirements vary by site, material and installation. For code-regulated or load-bearing work, consult a qualified professional.

    Calculations run 100% in your browser — zero tracking of your dimensions or input data.

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    Frequently asked questions

    What does the Tile Quantity Calculator calculate?

    The Tile Quantity Calculator estimates tile quantity quantity for US jobs — Floor area in square feet, Boxes or rolls with waste, Grout and adhesive. Enter dimensions, choose units, add waste and price to get instant results.

    How do I measure for tile quantity?

    Measure room 12x10 ft, tile 12x12 in, grout 1/8 in on site. Use the unit selectors — the tool converts inches→feet (÷12) and yards→feet (×3) before math. For non-rectangular, split into rectangles and add.

    How much waste should I add?

    Add 10% for straight, 15% for diagonal or large tile. Pattern adds 20%.

    How accurate is this tile quantity estimate?

    Math is exact for your inputs. Actual needs vary by site, material and installation. Add 5–10% waste for rectangular, 10–15% for irregular.

    About Calculator Street

    Built by Vipul Otari for US homeowners & contractors. Calculator inputs are processed in your browser. Estimates depend on your measurements, product specifications and the assumptions shown on this page. Confirm order quantities with your supplier and structural requirements with your project designer. Page updated: 2026-09-11.

    Free·Fast·Mobile-friendly·US units·Reviewed