Stone Calculator by
Square Feet — Material Planner

Measure the area length and width in feet, multiply to get square feet. Stone coverage depends on the stone type and thickness. For flagstone, one ton covers about 80-100 sq ft at 1.5 inches thick.

One ton of flagstone covers 80-100 sq ft at 1-1.5 inches thick. A ton of river rock covers 50-75 sq ft at 2-3 inches deep. A ton of crushed gravel covers 80-100 sq ft at 2 inches deep.

Flagstone costs $3 to $7 per square foot for materials only. Installed flagstone patios cost $15 to $30 per square foot including base preparation, stone, and labor.

Measure the patio length and width in feet and multiply to get square footage. Add 10% for waste and cuts. For a 200 sq ft patio, order about 220 sq ft of stone.

For curved walkways, multiply the average width by the total length. For circular areas, use the circle calculator with the diameter. For irregular curves, split the path into straight sections.

Calculate the face area of the wall: height × length = square feet. A wall 3 feet tall and 20 feet long has 60 sq ft of face area. Natural stone for walls costs $10 to $25 per sq ft of face area.