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Bulk Modulus

- Summary
- Calculate Bulk Modulus from Differential Change in Pressure and Volume
- Calculate Bulk Modulus from Youngs Modulus and Poisson’s Ratio
- Typical Values of Some Materials
- See Also

The bulk modulus measures a substance’s elastic resistance to change in volume when under uniform loading in all directions.

It can be thought of as an extension of the Youngs Modulus into three dimensions.

The formula for bulk modulus is:

(1)

Where V = initial volume, dP = change in pressure, dV = change in volume.

K can be alternatively calculated if the Youngs Modulus (also known as the Modulus of Elasticity) and the Poisson’s Ratio of the material are known. Here,

(2)

Where E = Youngs Modulus and = Poisson’s Ratio.

Bulk Modulus of Elasticity Calculator

Bulk Modulus of Elasticity Calculator using Youngs Modulus and Poisson’s Ratio

Typical Values of Some Materials

This table contains typical bulk modulus value ranges for different materials.

Material |
Bulk Modulus |

(GPa) | |

Aluminium | 64 – 78 |

Aluminium Alloys | 64 – 88 |

Boron Carbide (B_{4}C) |
200 – 240 |

Brass | 105 – 115 |

Brick | 5 – 27 |

Bronze | 104 – 125 |

Carbon (Diamond) | 550 – 670 |

Concrete | 6 – 28 |

Copper | 108 – 142 |

Cork | 0.01 |

Glass | 33 – 45 |

Gold | 125 |

Iron | 119 – 167 |

Magnesium | 35 |

Nickel | 158 – 175 |

Nylon | 3 – 8 |

Platinum | 236 – 283 |

Rubber | 257 |

Silver | 96 – 106 |

Solder (Tin-Lead) | 33 – 58 |

Steel | 138 – 179 |

Stone (Granite) | 22 – 58 |

Stone (Limestone) | 3 – 22 |

Stone (Marble) | 39 – 58 |

Tin | 42 – 60 |

Titanium | 93 – 111 |

Tungsten | 307 – 314 |

Zinc | 70 – 72 |

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