How to Calculate How Many Interlocking Stones for a Driveway

Interlocking stones, also called interlocking pavers, are a decorative and simple way to pave a driveway. According to Belgard Hardscapes, interlocking stones don't crack like cement, require very little maintenance and resist weather deterioration from freeze/unfreeze cycles. Interlocking stones are typically small in size, so it requires a large number to pave an entire driveway. Fortunately, it is easy to calculate the number needed as long as you know the formula.

Measuring tape

Instructions

- 1
  Measure the length and width of the driveway. Divide the driveway into squares, circles, triangles and rectangles if the driveway isn't a perfect rectangle, and measure each one separately. Measure the radius of the circular sections and the height and base of the triangles.
- 2
  Calculate the area of the driveway. Multiply the length times the width for rectangles and squares. Multiply the base times the height and divide in half for triangles. Multiply the radius by pi for circles. Add the calculations together to get the total area.
- 3
  Add 10 percent to the total to account for broken stones and miscalculations.
- 4
  Divide the total by the area of each interlocking stone. For example, if the total is 500 square feet and each interlocking stone is 0.5 square feet, you will need 1,000 interlocking stones.

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