længder

Längder is the Swedish term for lengths, referring to the measurement of how long something is along a linear dimension or the distance between two points. In everyday language, längd describes the size of an object, while in mathematics and physics it denotes the length of a line, a curve, or a path.

Length is measured in units. The SI base unit is the meter (m). Common submultiples and multiples include the centimeter (cm), millimeter (mm), and kilometer (km). In various contexts, such as textiles or construction, other units may be used, including decimeters or feet and yards. Conversions include: 1 m = 100 cm = 1000 mm; 1 km = 1000 m; 1 inch = 2.54 cm; 1 yard = 0.9144 m.

Tools and procedures: Measuring längder requires appropriate instruments. Rulers and tape measures are used for short to moderate lengths; calipers for precise small parts; laser distance meters for longer spans. Measurement uncertainty arises from instrument precision, alignment, and reading errors, and is typically expressed as a tolerance or margin of error.

Applications: Length measurements are foundational in science, engineering, construction, packaging, and fashion. They enable specification, tolerancing, and quality control. In mathematics, the concept extends to the length of curves and the metric distance between points in space, linking practical measurement with theoretical concepts. See also concepts of length, measurement, and SI units.