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Flagstone Calculator

Result
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◆ LIVE 3D PREVIEW
Coverage
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Mortar/Poly Sand
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CalcBuild › Flagstone Calculator

How to Calculate Flagstone

Use this free flagstone calculator to get instant, accurate results for your construction project. Simply enter your measurements above and the calculator will automatically compute the result using industry-standard formulas.

Pro Tip: Always add 10-15% extra material to account for waste, cuts, and job-site conditions. This is standard practice recommended by experienced contractors.

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💡 Pro Tips — Flagstone

❓ Frequently Asked Questions

+How deep is the base?
4" compacted gravel for patios/walkways. 8-12" for driveways. Plus 1" of screeded sand on top.
+How many pavers per sq ft?
Standard 4×8": 4.5 per sq ft. 6×6": 4 per sq ft. 12×12": 1 per sq ft. Plus 5-10% waste.
+Do I need edge restraint?
Yes — always. Without edge restraint, pavers shift and separate. Use aluminum L-channel or concrete curb.
+What sand to use?
Bedding layer: coarse concrete sand (NOT play sand). Joints: polymeric sand that hardens when wet to prevent weeds.