Convert metric and imperial lengths — from nanometers and millimeters to miles, nautical miles, and astronomical scales.
A nautical mile is defined as exactly 1,852 meters and tracks Earth latitude arcs used in marine and aviation navigation. A statute (land) mile is 1,609.344 meters.
Yes. The international inch is defined as exactly 25.4 millimeters, which keeps engineering conversions consistent worldwide.
Light years are common in popular science. Professional astronomy often prefers parsecs (~3.26 light years) because they relate directly to parallax measurements.