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Paving Stone Quantity Calculator

This calculator helps estimate the number of paving stones needed to cover a defined area, with an optional 10% allowance for wastage. By entering the total surface dimensions and the size of a single paving stone, you get both the required quantity and a recommended amount to purchase.

Calculate Number of Paving Stones with Wastage

Input Fields
a
m
b
m
l
m
w
m
If enabled, the result will update automatically when you change any value.

Paving Stone Quantity Formula

Formula
$$S = a \cdot b$$ $$p = l \cdot w$$ $$r = \frac{a \cdot b}{l \cdot w}$$ $$c = r + \left( \frac{10}{100} \cdot r \right)$$

Where

  • $$a$$, $$b$$ — area length and width (to be paved)
  • $$l$$, $$w$$ — length and width of one paving stone
  • $$r$$ — required number of stones
  • $$c$$ — total recommended number of stones (includes 10% extra for breakage/wastage)


This calculator is widely used for driveways, patios, walkways, and other paving projects. The built-in 10% allowance ensures you have extra tiles for cutting, mistakes, or replacements. Input can be in any unit (meters, feet, inches) as long as all measurements use the same unit system.

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