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Tile Calculator

Tiles needed for a surface. Free online Tile Calculator. Calculate tile online — fast, accurate, mobile-friendly, no signup needed.

Tiles
88

Derivation

  1. ├── 01Givenarea_ft2 = 80, tile_in = 12, waste = 10
  2. ├── 02Formulaceil(144 × t / (a²) × (1+n / 100))
  3. └── 03Compute Tiles88
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§01What is

Understanding the Tile Calculator

The Tile Calculator computes Tiles from 3 inputs: area (ft²), tile size (in), waste (%). Tiles needed for a surface.

On a construction site, estimates that come in 10% off add up to six-figure overruns. Running the quantities with a calculator instead of a rule-of-thumb gets you closer to the truth with zero extra effort. The Tile Calculator sits in that toolkit — it tiles needed for a surface. Enter your numbers above and the result updates instantly; every step of the math is shown in the Derivation panel so you can see exactly how the answer was reached.

§02The Formula

How it’s calculated

ceil(144 × t / (a²) × (1+n / 100))

Where

area_ft2
Area (ft²)
tile_in
Tile size (in)
waste
Waste (%)
§03Practical Example

Step-by-step walkthrough

Scenario

Apply the formula to a realistic set of inputs: Area (ft²) = 80, Tile size (in) = 12, Waste (%) = 10.

  1. 01Start by noting the input — Area (ft²): 80.
  2. 02Start by noting the input — Tile size (in): 12.
  3. 03Start by noting the input — Waste (%): 10.
  4. 04Substitute these values into the formula: ceil(144 × t / (a²) × (1+n / 100))
  5. 05Compute Tiles: the calculator returns 88.
  6. 06Cross-check the answer by opening the Derivation panel above — every line of math is shown so you can follow the computation end-to-end.
§04Variants

Common Tile Problems

The formula gets rearranged depending on which variable you need. Here are the patterns you’ll run into in the real world — find the one that matches your problem and follow the worked steps.

01 · PATTERN

Area (ft²) halved

area_ft2 = 40 (from 80)

Keep every other input at its default and halve the area (ft²). See how tiles responds.

  1. 01New Area (ft²): 40
  2. 02Baseline Tiles: 88
  3. 03New Tiles: 44
  4. 04Tiles decreases by 50% → use this sensitivity to plan for real-world variation.
02 · PATTERN

Area (ft²) doubled

area_ft2 = 160 (from 80)

Keep every other input at its default and double the area (ft²). See how tiles responds.

  1. 01New Area (ft²): 160
  2. 02Baseline Tiles: 88
  3. 03New Tiles: 176
  4. 04Tiles increases by 100% → use this sensitivity to plan for real-world variation.
03 · PATTERN

Tile size (in) halved

tile_in = 6 (from 12)

Keep every other input at its default and halve the tile size (in). See how tiles responds.

  1. 01New Tile size (in): 6
  2. 02Baseline Tiles: 88
  3. 03New Tiles: 352
  4. 04Tiles increases by 300% → use this sensitivity to plan for real-world variation.
04 · PATTERN

Tile size (in) doubled

tile_in = 24 (from 12)

Keep every other input at its default and double the tile size (in). See how tiles responds.

  1. 01New Tile size (in): 24
  2. 02Baseline Tiles: 88
  3. 03New Tiles: 22
  4. 04Tiles decreases by 75% → use this sensitivity to plan for real-world variation.
§05FAQ

Frequently asked questions

Yes. The calculator implements the standard formula as documented and returns exact floating-point results. No approximations are used unless noted in the formula.
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