Flagstone Weight Calculator
Estimate flagstone weight from the coverage area, average thickness, and stone type. See results in kilograms and pounds for delivery and handling planning.
Stone dimensions
Use the total area and average thickness of the flagstone.
690 kg
1,521.2 lb · 0.3 m³ of stone
Estimate the weight of flagstone for a patio, walkway, or delivery. Enter the total coverage area and average stone thickness, then choose a stone type or enter a custom density. Results are estimates because natural stone density and actual thickness vary.
How to Use Flagstone Weight Calculator
Enter the stone dimensions
Enter the total area you plan to cover and the average thickness of the flagstone. Use the unit selectors to match your measurements.
Choose the stone type
Select a common stone to use its typical density, or choose Custom and enter a density supplied by your quarry or supplier.
Read the estimate
The calculator reports estimated total weight in kilograms and pounds, along with the volume used in the calculation.
Calculator Features
Flexible units
Enter area in square metres or square feet and thickness in millimetres or inches.
Stone presets
Start with typical density estimates for limestone, sandstone, slate, and granite.
Dual-unit results
See estimated weight in kilograms and pounds.
Common Calculations & Examples
Example 1: Estimate a small patio
Problem: Estimate 20 m² of sandstone flagstone with an average thickness of 30 mm.
Steps:
- Enter 20 as the area and select m².
- Enter 30 as the thickness and select mm.
- Choose Sandstone.
Explanation: This gives a useful planning estimate for delivery and handling; use supplier specifications for a more precise figure.