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Flagstone Calculator

Accurately Estimate Flagstone Coverage, Weight, and Cost for Patios, Walkways & Walls

Use this flagstone calculator to estimate coverage for patios, paths, and stepping stones.

5–200 ft
5–100 ft
Affects weight & coverage

Enter dimensions to calculate

Calculate flagstone calculator needs for retaining walls, garden borders, and free-standing walls.

10–500 ft
1–6 ft (dry stack max)

Enter wall details

Fine-tune your flagstone calculator with waste factor, joint width, and cost per sq ft.

50–20,000 sq ft
5–30% for cuts/breakage

Enter custom parameters

Flagstone Calculator: Your Essential Tool for Perfect Stone Projects

Welcome to the most accurate flagstone calculator for landscapers, contractors, and DIY enthusiasts. Whether you're building a natural stone patio, dry stack wall, or garden path, this tool delivers precise coverage, weight, and cost estimates instantly.

"Lapis naturalis, via aeterna." — Latin wisdom on enduring stone paths

How the Flagstone Calculator Works

Our flagstone calculator uses real-world coverage rates: 80–120 sq ft per ton depending on thickness and joint spacing. All inputs are validated to prevent unrealistic values.

  • Patio Mode: Standard 1.5–2.5" thick slabs
  • Wall Mode: Accounts for face area and depth
  • Custom Mode: Full control over joints and waste

Flagstone Calculator: Popular Applications

  • Irregular flagstone patios
  • Stepping stone walkways
  • Dry stack retaining walls
  • Pool coping and decking
  • Garden borders and fire pits

Why Use This Flagstone Calculator?

Professional-grade accuracy:

  • Real Coverage Rates: 80–120 sq ft/ton
  • Three Modes: Patio, Wall, Custom
  • Waste Factor: Built-in 5–30%
  • Mobile-Optimized: Use on-site
  • Instant Results: No page reloads

Flagstone Calculator: Pro Installation Tips

Achieve perfect results:

  • Order 10–20% extra for cuts and breakage
  • Use polymeric sand for stable joints
  • Compact base with 4–6" gravel
  • Mix sizes for natural look
  • Allow 1–2" height variation

Start Your Flagstone Project with Confidence

Eliminate guesswork. Our flagstone calculator ensures you order exactly what you need — no shortages, no excess.

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