Length Converter

A free online conversion calculator that convert between meters, feet, inches, kilometers, and miles. Get accurate results instantly without any software installation. Length and distance units scatter across measurement systems that rarely align: construction blueprints use feet and inches, European road signs use kilometers, fabric measurements cite yards, and scientific instruments report in nanometers. Cross-referencing these without a converter wastes time on projects spanning international teams and mixed standards. Switch between metric units (nm, µm, mm, cm, m, km) and imperial units (inch, foot, yard, mile, nautical mile) with a single input field that updates all units at once. Engineering and surveying precisions are supported. Input any measurement in meters, kilometers, miles, feet, inches, centimeters, or millimeters and see all equivalents render simultaneously. The converter supports fractional inch notation for woodworking and decimal precision toggles for engineering tolerances. Distance calculations run through client-side JavaScript with no backend calls. Architectural dimensions and proprietary survey measurements stay private to your browser, which is critical when handling confidential construction or patent data.