Granite Weight Calculator
Volume
0.00 m³
Weight
0.00 kg
Granite is one of the heaviest and most durable natural stones used in construction, kitchen countertops, flooring, and architectural projects. Because of its density, estimating the exact weight of a granite slab is important for safe transportation, installation, and cost planning. Our Granite Weight Calculator helps you calculate the weight of any granite piece based on length, width, thickness, and material density — in seconds.
Whether you’re a builder, contractor, homeowner, or countertop installer, this tool gives you accurate, engineering-grade calculations without needing formulas or manual conversions.
Why Granite Weight Matters
Knowing the weight of granite is important for:
✔ Transportation & Lifting Safety
Granite slabs are extremely heavy. Calculating weight ensures you use proper equipment like cranes, clamps, or additional labor.
✔ Cost Estimation
Many suppliers calculate shipping, handling, and installation fees based on total weight.
✔ Structural Support
Countertops and flooring may require reinforcements depending on the slab weight.
✔ DIY Planning
Homeowners can better plan a remodel when they know how heavy each piece will be.
How the Granite Weight Calculator Works
The calculator uses three important factors:
1. Dimensions (Length × Width × Thickness)
Granite is usually measured in centimeters or inches. Common thicknesses include:
2 cm (¾ inch)
3 cm (1¼ inch)
4 cm for heavy-duty surfaces
The larger and thicker the slab, the more it weighs.
2. Granite Density (kg/m³)
Different granite types have different densities:
| Granite Type | Average Density |
|---|---|
| Standard Granite | 2700 kg/m³ |
| Black Galaxy | 2800 kg/m³ |
| Absolute Black | 2900 kg/m³ |
| High-Density Granite | 3000+ kg/m³ |
Our tool includes these presets plus a custom density option.
3. Unit Conversion
The calculator automatically handles conversions between:
Centimeters
Inches
Meters
Cubic meters
This ensures the final weight is highly accurate.
Example: Weight of a Standard 3 cm Granite Slab
Let’s calculate the weight of a countertop measuring 100 cm × 60 cm × 3 cm.
Convert to meters:
100 cm = 1.0 m
60 cm = 0.60 m
3 cm = 0.03 m
Volume = 1.0 × 0.60 × 0.03 = 0.018 m³
Multiply by density (2700 kg/m³):
Weight = 0.018 × 2700 = 48.6 kg
A single slab of this size weighs nearly 50 kg, which is why proper lifting safety is essential.
Common Granite Weight Estimates
These are approximate values based on average density:
2 cm slab → 54–60 kg per m²
3 cm slab → 80–90 kg per m²
Kitchen countertop (typical) → 45–120 kg
Full-size slab → 250–450 kg
Our calculator gives a far more precise weight based on your actual measurements.
Benefits of Using This Granite Weight Calculator
✔ Accurate weight calculations
Uses precise density formulas trusted by stone experts.
✔ Supports all granite types
From standard granite to heavy-density black stone.
✔ Custom thickness & density fields
Perfect for engineers and fabricators working with unique materials.
✔ Helps reduce installation risks
Know exactly how much manpower or lifting equipment you need.
✔ Saves time on manual math
Instant and error-free calculations for busy professionals.
Who Should Use This Tool?
This Granite Weight Calculator is ideal for:
Homeowners planning countertop installation
Stone dealers and granite suppliers
Kitchen and bath fabricators
Architects and civil engineers
Contractors and renovation companies
Movers and logistic companies
DIY remodelers
If you handle granite in any capacity, this tool gives you reliable, valuable data instantly.
Tips for Handling and Installing Granite Safely
Never lift granite slabs alone
Always use A-frames, clamps, and proper strapping
Transport large slabs vertically, not flat
Protect edges—they are the most fragile part
For 3 cm slabs, reinforce weak cutouts around sinks and cooktops
Check the total weight before placing on cabinets or flooring
For outdoor installation, consider stone density and weather exposure
Final Thoughts
Granite is a strong, beautiful, and durable stone — but its heavy weight requires proper planning. Our Granite Weight Calculator ensures you know exactly how much your slab weighs before you transport, lift, or install it. This helps prevent injuries, reduces installation errors, and ensures your project runs smoothly from start to finish.