Granite Weight Calculator
This calculator works for all natural stone — granite, marble, quartzite, sandstone, limestone, and travertine. Select your stone type, enter the slab or tile dimensions and number of pieces, and get the estimated weight in kilograms and pounds, total area in sq ft and sq m, and weight per unit area. Useful for shipping planning, container loading, freight cost estimates, and project material takeoffs.
How This Calculator Works
The calculation is pure geometry combined with a material property — density. No proprietary adjustments, no hidden factors.
Step 1 — Convert all dimensions to metres
Whatever unit you enter (cm, mm, inches, feet), the calculator converts each dimension to metres using fixed conversion factors: 1 inch = 0.0254 m, 1 foot = 0.3048 m, 1 cm = 0.01 m, 1 mm = 0.001 m.
Step 2 — Calculate volume in cubic metres
Step 3 — Multiply volume by density
Density is the mass of the stone per cubic metre. Granite at 2,750 kg/m³ means one cubic metre of that granite weighs 2,750 kg. This is a physical property of the stone — not an estimate we invented.
Step 4 — Convert to other units
Area (sq ft) = Height (m) × Length (m) × pieces × 10.764
Weight per sq ft = Total weight (kg) ÷ Total area (sq ft)
Why trust these figures? The density ranges used in this calculator are based on material specifications verified through our own factory and quarry operations across Rajasthan, Andhra Pradesh, and Telangana — cross-referenced with published mineralogical data. We process and export natural stone every day. These are the same figures our own team uses for container planning and freight calculations. The formula itself is standard physics. You can verify it with any engineering reference.
What the results do not account for: cutting waste, mortar bed weight, surface finish variations, or material rejected during quality inspection. For project procurement, add a waste factor of 10–15% on top of the calculated quantity.
Square Feet / Square Meters
Instructions for using the Granite Weight Calculator:
Important notice: All weight calculation results provided by the weight calculator are approximate and intended for reference purposes only.
- To calculate the weight of a granite slab or tile, you need specific details such as its dimensions (height, width, length), thickness, and the stone's density.
- We understand that many users may not be familiar with the density of granite. You can request this information from the manufacturer or supplier. If the density is still unavailable, you can estimate it based on the granite's color category: light-colored, average (a mix of light and dark), or dark-colored granite.
- If you know the exact density of the granite and want a precise weight calculation instead of an average, select "Custom Density" from the dropdown and enter the value in kilograms per cubic meter (kg/m3).
- Enter the total quantity (number of slabs or tiles), or leave the value at 1 if you only want to calculate the unit weight.
- The weight will be calculated as soon as you enter the values.
- To calculate the weight of granite per square foot, simply enter the dimensions for 1 square foot, specify the desired thickness, and set the number of pieces to 1. The result will give you the weight of granite per square foot.
- This calculator will help you to estimate the shipping quantity based on weight. Enter the entire quantity and you will have weight of entire cargo load.
- The result will include the total area in square feet (Sq Ft), total area in square meters (Sq Mtr), total weight in kilograms (KG), and total weight in pounds (LBS).
Density Reference by Stone Type
The density presets used in this calculator are based on typical measured ranges for each stone. Use the mid value for most calculations unless you have a lab-tested figure for your specific material.
| Stone | Low (kg/m³) | Mid (kg/m³) | High (kg/m³) | Notes |
|---|---|---|---|---|
| Granite | 2,600 | 2,750 | 3,050 | Absolute Black and similar pyroxene-rich varieties sit near the high end |
| Marble | 2,500 | 2,650 | 2,900 | Varies by origin and mineral composition |
| Quartzite | 2,600 | 2,700 | 2,800 | Dense and consistent; tight range |
| Sandstone | 2,000 | 2,300 | 2,600 | Wide range due to porosity variation between varieties |
| Limestone | 2,100 | 2,500 | 2,700 | Porous types at the low end; dense types approach marble |
| Travertine | 2,300 | 2,500 | 2,700 | Unfilled travertine with natural voids will weigh less than calculated |
Frequently Asked Questions
How do I calculate the weight of a granite slab?
Multiply the slab's length, height, and thickness (all in metres) to get the volume in cubic metres. Then multiply that volume by the density of granite in kg/m³. A typical granite slab at 2 cm thickness, 180 × 60 cm, using a mid-range density of 2,750 kg/m³:
Volume = 1.8 × 0.6 × 0.02 = 0.0216 m³. Weight = 0.0216 × 2,750 = 59.4 kg.
This calculator does all of that automatically. Enter your dimensions and number of pieces and the result appears instantly.
What is the weight of granite per square foot?
It depends on thickness and the specific granite variety. At the most common slab thickness of 2 cm and a mid-range density of 2,750 kg/m³:
Weight per sq ft = 2,750 × 0.02 ÷ 10.764 ≈ 5.11 kg/sq ft (approximately 11.26 lbs/sq ft).
At 3 cm thickness the figure rises to approximately 7.66 kg/sq ft. At 1.8 cm it is approximately 4.60 kg/sq ft. This calculator shows the per-sq-ft figure directly in the results once you enter your dimensions.
What is the weight of granite per square metre?
At 2 cm thickness and a density of 2,750 kg/m³, granite weighs approximately 55 kg per square metre. At 3 cm it is approximately 82.5 kg/m². At 1.8 cm it is approximately 49.5 kg/m².
Marble at 2 cm thickness and 2,650 kg/m³ comes to approximately 53 kg/m². Sandstone at 2.5 cm and 2,300 kg/m³ comes to approximately 57.5 kg/m².
The exact figure for your material and thickness is shown in the results table above.
What density value should I use for my granite?
Use the mid-range value (2,750 kg/m³) for most standard Indian granites — Kashmir White, Tan Brown, Steel Grey, and similar varieties. For dark iron- and pyroxene-rich granites such as Absolute Black (from Salem, Tamil Nadu) or Black Galaxy, use the high-range value (3,000–3,050 kg/m³). For light-coloured granites with high feldspar content, the lower range (2,600–2,650 kg/m³) is more accurate.
If you have a material test certificate (MTC) for your specific stone, use the measured density figure from that document by selecting "Enter custom density" in the dropdown.
How much does a marble slab weigh?
A standard marble slab at 180 × 60 cm and 2 cm thickness, using a mid-range density of 2,650 kg/m³:
Volume = 1.8 × 0.6 × 0.02 = 0.0216 m³. Weight = 0.0216 × 2,650 ≈ 57.2 kg.
A larger 240 × 120 cm slab at 2 cm thickness: Volume = 2.4 × 1.2 × 0.02 = 0.0576 m³. Weight = 0.0576 × 2,650 ≈ 152.6 kg.
Select Marble in the stone type dropdown above and enter your exact dimensions for a precise figure.
How much does sandstone weigh per square metre?
Sandstone has the widest density range of any common natural stone — 2,000 to 2,600 kg/m³ — because porosity varies significantly between varieties. At 2.5 cm thickness:
Low-density sandstone (2,000 kg/m³): approximately 50 kg/m². Mid-range (2,300 kg/m³): approximately 57.5 kg/m². Dense varieties (2,600 kg/m³): approximately 65 kg/m².
For Indian sandstones such as Dholpur, Agra Red, or Kota, the mid-range figure (2,300 kg/m³) is a reasonable starting point. Select Sandstone above and enter your dimensions and thickness for a precise result.
How many granite slabs fit in a 20-foot shipping container?
A standard 20-foot container has a payload capacity of approximately 21,700–28,000 kg and an internal volume of approximately 33 CBM. The limiting factor for stone is almost always weight, not volume.
Using this calculator: enter your slab dimensions and thickness, set pieces to 1, and note the weight per piece. Divide 21,000 - 27,500 kg by the weight per slab to get a rough piece count. Deduct around 3–10% for packing materials, wooden bundles, and stacking constraints.
For a detailed container loading estimate, use our Granite Shipping Container Capacity Calculator.
Is this calculator accurate for Indian granite and stone?
Yes. The density ranges in this calculator are validated against material test certificates and slab-level weighing data from Stone Galleria's own processing facilities in Kishangarh (Rajasthan), Jalore, and Pali — and cross-referenced with quarry data from suppliers in Andhra Pradesh and Tamil Nadu. The calculation method (volume × density) is the same used by freight companies, stone processors, and structural engineers worldwide.
The result is an estimate, not a certified weight. Actual slab weight can vary within the density range due to natural mineral variation, surface finish, and moisture content. For certified shipping weights, slabs should be weighed at dispatch.
What is the difference between kg/m³ and g/cm³?
They are the same measurement expressed in different scale units. 1 g/cm³ = 1,000 kg/m³. Granite at 2,750 kg/m³ is therefore 2.75 g/cm³. Both are commonly used in stone industry specifications — kg/m³ in freight and construction, g/cm³ in material test certificates and geology references.
The density conversion table shown below the calculator results shows the selected density in all common units simultaneously: g/cm³, lb/in³, lb/ft³, kg/ft³, and kg/m³.
Learn More: Recommended Blogs
To further enhance your understanding of granite, its weight, and shipping calculations, we recommend reading the following blogs: