Density of granite in every unit
Granite is the reference rock most stone figures descend from. Solid, it runs 165–172 lb/ft³ (specific gravity 2.65–2.75); crushed, the voids bring a yard down to ordinary crushed-stone weights. The chart covers the forms it's actually bought in:
| Form | lb/ft³ | lb/yd³ | t/yd³ |
|---|---|---|---|
| Solid granite | 165–172 | ≈ 4,536 | ≈ 2.3 |
| Crushed granite (¾″) | 100–104 | 2,700–2,800 | 1.35–1.4 |
| Decomposed granite (DG) | ≈ 111 | ≈ 3,000 | ≈ 1.5 |
| Granite boulders (stacked) | ≈ 110–120 | ≈ 3,000–3,240 | 1.5–1.6 |
| Rock | lb/ft³ |
|---|---|
| Basalt / trap rock | 180–190 |
| Granite | 165–172 |
| Marble | 160–170 |
| Limestone | 150–170 |
| Sandstone | 140–150 |
| Concrete (for scale) | ≈ 150 |
How to use granite density in an estimate
Buying crushed or decomposed granite by the ton? The bulk figures above are what the stone calculator and tonnage calculator apply — area × depth × density, rounded the way the quarry sells. For countertops and slab work, weight per square foot is thickness × solid density: at 3 cm, roughly 17–19 lb/ft².
Granite density FAQ
What is the density of granite?
Solid granite runs 165–172 lb per cubic foot — a specific gravity of 2.65–2.75, or 2,650–2,750 kg/m³. Composition moves it a little: darker, mineral-heavy granites sit at the top of the range.
How much does a cubic foot of granite weigh?
About 168 lb for solid stone — the mid-range figure. A cubic yard of solid granite is therefore around 4,536 lb, or 2.3 short tons: heavier than concrete, which is mostly granite-family aggregate with lighter paste between.
How much does crushed granite weigh per yard?
About 2,700–2,800 lb (1.35–1.4 tons) per cubic yard — the voids between pieces drop it well below solid stone, in line with other crushed rock. Decomposed granite (DG) compacts denser, roughly 3,000 lb loose-measured per placed yard.
How much does a granite countertop weigh?
A standard 3 cm (1¼ in) slab weighs about 17–19 lb per square foot, so a 40 ft² kitchen run carries roughly 700–760 lb. Thinner 2 cm material runs 11–13 lb/ft²; check the cabinet run can take it before templating.
Is granite heavier than concrete?
Yes, solid to solid: granite at ~168 lb/ft³ against concrete at 150. By the cubic yard that is 4,536 lb versus 4,050 — which is why granite boulders always weigh more than they look like they should.