Calculator inputs
Example data table
These worked examples show how typical density assumptions affect estimated shipping and lifting weight.
| Example | Shape | Dimensions | Density | Quantity | Approx. total weight |
|---|---|---|---|---|---|
| Granite paving slab | Rectangular | 1.20 m × 0.60 m × 0.03 m | 2700 kg/m³ | 10 | 583.2 kg |
| Limestone block | Rectangular | 2.00 m × 0.50 m × 0.40 m | 2500 kg/m³ | 3 | 3000 kg |
| Basalt column | Cylinder | Ø 0.35 m × 1.80 m | 3000 kg/m³ | 2 | 1039.08 kg |
| Quartzite boulder | Sphere | Ø 0.90 m | 2600 kg/m³ | 1 | 992.43 kg |
Formula used
Weight = Volume × Density
Base total weight = Single weight × Quantity
Adjusted total weight = Base total weight × (1 + Waste % ÷ 100)
Rectangular slab or block volume = Length × Width × Thickness
Cylinder volume = π × (Diameter ÷ 2)² × Height
Sphere volume = (4 ÷ 3) × π × (Diameter ÷ 2)³
Triangular prism volume = 0.5 × Base × Triangle Height × Prism Length
Force in kilonewtons = Weight in kg × 9.80665 ÷ 1000
Keep all units consistent. The calculator converts your entries into metric base units before applying the formulas.
How to use this calculator
- Select the stone shape that matches your piece or order item.
- Choose a preset material or type a supplier density value.
- Pick the correct dimension unit, then enter all required measurements.
- Enter quantity and a waste allowance for breakage, trimming, or overage.
- Press the calculate button to see weight, tonnage, force, and the chart.
- Use the CSV or PDF buttons to share the estimate with site teams.
FAQs
1) Which density should I use for natural stone?
Use the supplier, quarry, or lab density whenever possible. Preset values are practical planning defaults, but real density changes with mineral mix, porosity, moisture, and finish.
2) Why add a waste allowance to stone weight?
Waste allowance covers cutting loss, breakage, damaged edges, sorting, and purchase overage. It helps procurement and lifting plans reflect realistic site handling totals.
3) Does this calculator work for paving slabs and wall cladding?
Yes. Choose the rectangular option, enter panel size and thickness, then set the correct density. The result is useful for pallets, anchors, and manual handling checks.
4) Can I estimate boulder or carved stone weight?
Yes, but treat it as an approximation. Use the sphere option for rounded boulders or the custom volume option when you already know the displaced volume.
5) What is the difference between metric tons and short tons?
A metric ton equals 1000 kilograms. A short ton equals 2000 pounds, or about 907.18 kilograms. Jobsite hauling and procurement documents may use either unit.
6) Why does thickness change weight so much?
Weight rises directly with volume. For slabs, increasing thickness multiplies the entire plan area, so even a small thickness change can add substantial pallet and lifting weight.
7) Is the force result useful for structure checks?
It is useful for quick planning, but it is not a structural design approval. Use project load combinations, support spacing, and engineer review for final verification.
8) Can I use vendor dimensions in inches and density in lb/ft³?
Yes. Enter imperial dimensions, select lb/ft³ for density, and the calculator converts everything automatically. This helps compare vendor sheets with site tonnage estimates.