Flagstone Calculator
Flagstone is flat paving stone sold by the ton. Coverage depends on thickness (typically 1-1.5"). Enter your area for tons needed and cost.
Price snapshot
$300–$600 / ton
Updated 2026-07-09
Source: Lowes public listings + regional averages
Source: Lowes public listings + regional averages
Estimate your flagstone
Showing a default 20 × 20 ft area at 5" deep. Enter your own numbers below.
Volume
6.17 yd³
You need (+10% waste)
9.17 tons
Estimated cost
$2,750–$5,500
Material only, $300–$600 per ton. Delivery and labor not included. Estimates only — not engineering advice.
Flagstone cost breakdown
- Material (per ton)
- $300–$600 for flagstone — premium paving stone.
- Delivery
- $60–$150 per load.
Buying & spec guide
- Flagstone coverage: ~120 sq ft per ton at 1.5" thickness.
- Thinner stone (1") covers more area; thicker (2") covers less.
- Buy 10% extra for cuts and waste.