Relative Permittivity Values for Common Materials
On this page, you can find the relative permittivity (dielectric constant) values for different materials, taken at room temperature (approximately 20°C or 68°F).
| Air | 1.0006 |
| Alcohol | 15 - 30 |
| Alumina | 8 - 11.5 |
| Bakelite | 3.5 - 5.5 |
| Barium strontium titanate (BST) | 200 - 500 |
| Barium titanate | 120 - 160 |
| Benzene | 2.3 |
| Calcium | 3 |
| Carbon tetrachloride | 2.24 |
| Diamond | 5.5 - 10 |
| Ethanol | 24.3 |
| Gallium arsenide | 12 - 13.5 |
| Gasoline | 2.25 |
| Germanium | 16 |
| Glass | 4 - 10 |
| Glycerin | 42.5 |
| Granite | 7 - 9 |
| Graphite | 10 - 15 |
| Ice (at 0°C) | 3.15 |
| Lead lanthanum titanate | 1200 - 1700 |
| Lead magnesium niobate (PMN) | 3000 - 8000 |
| Lead zirconate titanate (PZT) | 1000 - 2000 |
| Lithium niobate | 40 - 85 |
| Lithium tantalate | 46 - 52 |
| Marble | 8 |
| Mercury | 1.05 |
| Methanol | 30 |
| Mica | 2.5 - 7.5 |
| Nylon | 3 - 5 |
| Olive oil | 3 |
| Paper | 2.3 - 3.5 |
| Paraffin wax | 2 - 2.5 |
| Petroleum ether | 1.8 |
| Polyester | 3.2 - 3.8 |
| Polyethylene | 2.25 - 2.6 |
| Polyimide | 3 - 3.5 |
| Polypropylene | 1.8 - 2.4 |
| Polystyrene | 2.4 - 3 |
| Porcelain | 4.5 - 7 |
| Potassium chloride | 4.9 |
| Polyvinyl Chloride (PVC) | 3 - 4 |
| Pyrex | 4 - 5 |
| Rubber | 2.25 - 3 |
| Sapphire | 9 - 11.5 |
| Silicon | 11.5 - 12.5 |
| Silicon carbide | 9 - 10 |
| Silicon dioxide (Quartz) | 3.8 - 4.5 |
| Silicon nitride | 7-9.5 |
| Sodium chloride | 5.5 |
| Strontium titanate | 300 - 400 |
| Styrofoam | 1.05 |
| Sulfur | 3.5 |
| Teflon (PTFE) | 2 - 2.3 |
| Transformer oil | 2.2 - 2.5 |
| Vacuum | 1 |
| Water | 78.3 |
| Zinc oxide | 8.1 - 9.3 |
The values listed here are approximate and may vary depending on the specific material and its composition, temperature, frequency, and other factors.
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