Does brick float?
Does brick float?
No
1,900 kg/m³ against water's 1,000
Brick sinks. At 1,900 kg/m³ it is 1.90 times denser than water.
Why
Floating is decided by density alone — mass divided by volume — compared against the fluid. Weight has nothing to do with it directly: a 200-tonne ship floats and a 2-gram pebble sinks, because the ship encloses enough air to bring its average density below that of water. That is also the only reason a steel hull works.
The numbers
- Density
- 1,900 kg/m³ (1,600–2,100)
- Relative to fresh water
- 1.900×
- Floats in fresh water
- No
- Floats in seawater
- No
Compared with other materials
| Material | Density | Floats |
|---|---|---|
| epoxy resin | 1,150 kg/m³ | No |
| acrylic (PMMA) | 1,180 kg/m³ | No |
| polycarbonate | 1,200 kg/m³ | No |
| lignum vitae | 1,230 kg/m³ | No |
| PLA | 1,240 kg/m³ | No |
| flexible PVC | 1,250 kg/m³ | No |
| silicone rubber | 1,250 kg/m³ | No |
| PETG | 1,270 kg/m³ | No |
| neoprene | 1,300 kg/m³ | No |
| rigid PVC | 1,400 kg/m³ | No |
Common questions
- Does brick float in water?
- No — at 1,900 kg/m³ it is denser than water's 1,000.
- Does weight decide whether something floats?
- No, density does. A 200-tonne ship floats and a small pebble sinks, because the ship encloses enough air to bring its average density below water.
Related pages
- Brick properties Density, melting point, strength
- Does air float? Yes
- Does expanded polystyrene foam float? Yes
- Does rigid polyurethane foam float? Yes
- Does EVA foam float? Yes
- Does balsa float? Yes
- Does corrugated cardboard float? Yes
- Does cork float? Yes
- Does western red cedar float? Yes
Sources
- Typical range compiled from manufacturer specifications — At One Place