| Liquid | Compressibility, k |
| Pa-1 x 10-11 | Atm-1 x 10-6 |
| Carbon disulfide | 93 | 94 |
| Ethyl alcohol | 110 | 111 |
| Glycerine | 21 | 21 |
| Mercury | 3.7 | 3.8 |
| Water | 45.8 | 46.4 |
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Compressibility is the fractional change in volume per unit increase in pressure. For each atmosphere increase in pressure, the volume of water would decrease 46.4 parts per million. The compressibility k is the reciprocal of the Bulk modulus, B. (Data from Sears, Zemansky, Young, and Freedman, University Physics, 10th Ed., Section 11-6. )
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