What type of accuracy is important when using calipers?

When using calipers, absolute accuracy is paramount. Absolute accuracy refers to the degree to which a measured value reflects the true value of the quantity being measured. In the context of calipers, which are tools used to make precise measurements of length, width, and depth, it is crucial that these calipers provide measurements that are correct and true, as even slight errors can lead to significant discrepancies in any work or projects relying on those measurements.

This is especially important in fields such as machining, engineering, and woodworking, where precise dimensions can greatly impact the fit and function of assembled components. While relative accuracy, precision accuracy, and linear accuracy are relevant concepts in measurement, they do not capture the essential requirement of establishing that a caliper is yielding measurements that are true and correct—this is what absolute accuracy ensures.