Flagstone calculator
Area shape
Rectangle / square
Circle
I know the square feet
Length
ft
Width
ft
Diameter
ft
Area
sq ft
Stone thickness
Thin, 1–1.5 in (≈110 sq ft/ton)
Standard, 1.5–2 in (≈90 sq ft/ton)
Thick, 2–3 in (≈65 sq ft/ton)
Extra for waste
%
Irregular stone needs 10–15%
Gravel base
in
Sand / stone dust bed
in
Flagstone price per ton (optional)
$
You'll need
Free calculator by Backyard Numbers ↗