Digital vernier calipers can switch between metric and imperial units.

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Unit switching capability lets digital vernier calipers read in both metric and imperial units. These calipers include a unit toggle button that lets you switch the display between millimeters and inches, so you can work with either measurement system on the same instrument. This is practical because parts and drawings may specify different units, and being able to read in both formats saves time and reduces errors. In many models you can also choose how inches are displayed—decimal inches or fractions—but the essential point is that metric and imperial readings are both supported. The statement that they can switch between metric and imperial measures is the correct one because it accurately reflects the common functionality of digital vernier calipers.