Flagstone Patio Calculator
Calculate Flagstone Patio Materials
Estimate flagstone, base, and filler for a patio
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Formula
Tons = (Area sq ft / 85) x (1.5 / Thickness in) x 1.15 waste factor
Frequently Asked Questions
How much flagstone do I need per square foot?
At 1.5 inches thick, you need approximately 1 ton per 85 square feet. Thicker stone covers less area per ton. Add 10-15% for cutting waste and irregular shapes.
What base do I need under a flagstone patio?
A typical flagstone patio needs a 4-inch compacted gravel base topped with a 1-inch sand setting bed. This provides proper drainage and a level surface for the stone.
How much does a flagstone patio cost?
Flagstone ranges from $200-$700 per ton depending on type and region. A typical 150 sq ft patio costs $700-$2,500 for materials. Professional installation adds $8-$20 per square foot for labor.
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