While accuracy at smaller increments isn’t as great, digital calipers are still extremely accurate tools. They can easily switch between systems for more accurate measurements, conversions, and comparisons. However, your accuracy may not be much better than 0.001 inches for a 6-inch caliper and it can be even worse for longer sets. Don’t let this discourage you. They can still measure much smaller than a tape measure and are much more accurate. Even if they only guarantee accuracy down to 0.001 inches, you can still get a much more accurate measurement at smaller intervals than you can any other tool.