What is the density of brick?

1,900 kg/m³ (1,600–2,100), or 1.90 g/cm³.

No. At 1,900 kg/m³ it is denser than water.

Brick

Density of brick

1,900 kg/m³ (1,600–2,100)

1.90 g/cm³ · 118.6 lb/ft³

A standard fired clay brick weighs 2 to 3 kg depending on format and carries 20-50 MPa in compression, but only 1.5-3 MPa in tension, which is why brickwork is designed never to be pulled apart and why walls need buttressing or ties rather than being asked to bend. Fired brick expands slightly and irreversibly for years after leaving the kiln as it takes moisture back up, which is what movement joints in long walls exist to absorb. Firebrick is a different material altogether: lower density, higher alumina, and rated to 1400 °C or more.

Properties

Density: 1,900 kg/m³ (1,600–2,100) — 1.90 g/cm³
Tensile strength: 1.5–3 MPa
Young's modulus: 15 GPa
Thermal conductivity: 0.7 W/(m·K)
Thermal expansion: 6 µm/(m·K)
Floats in water: No
Magnetic: No

What it is used for

Load-bearing and cladding walls
Chimneys and fireplaces
Paving and garden walls
Kiln and furnace linings (as firebrick)

How it compares

Water is 1,000 kg/m³. Anything with a shorter bar than water floats in it.

air 1.2 kg/m³

expanded polystyrene foam 20 kg/m³

rigid polyurethane foam 40 kg/m³

Water — the float line 1,000 kg/m³

brick 1,900 kg/m³

tungsten 19,250 kg/m³

gold 19,300 kg/m³

platinum 21,450 kg/m³

Water is 1,000 kg/m³. Anything below that floats.
Material	Density	Relative to water
rigid polyurethane foam	40 kg/m³	0.04×
expanded polystyrene foam	20 kg/m³	0.02×
air	1.2 kg/m³	0.00×
brick ←	1,900 kg/m³	1.90×
platinum	21,450 kg/m³	21.45×
gold	19,300 kg/m³	19.30×
tungsten	19,250 kg/m³	19.25×

Does it rust?

Brick contains no iron, so it cannot rust. Whether it degrades depends on the material, not on oxidation.

Is it magnetic?

Brick is not a metal and has no ferromagnetic response.

Common questions

What is the density of brick?: 1,900 kg/m³ (1,600–2,100), or 1.90 g/cm³.
Does brick float?: No. At 1,900 kg/m³ it is denser than water.
Is brick magnetic?: Brick is not a metal and has no ferromagnetic response.

Does brick float? No
Concrete 2,400 kg/m³
Gypsum board (drywall) 700 kg/m³
Tungsten carbide 14,900 kg/m³
Reinforced concrete 2,500 kg/m³
Graphite 2,200 kg/m³
Porcelain 2,400 kg/m³
Plaster 1,100 kg/m³
Silicon carbide 3,210 kg/m³

Sources

Typical range compiled from manufacturer specifications — At One Place

How these figures are compiled and checked