Linjaler

Linjaler (rulers) are measuring instruments used to measure length and to draw straight lines. They are common in schools, offices, workshops, and design studios. Linjaler can be used for everyday measurements as well as for technical drawing, drafting, and construction tasks. They range in length from a few centimeters to one meter or more and are made from wood, plastic, or metal.

There are several main types of linjaler. Straight rulers provide a single edge with graduation marks. Folding or jointed rulers extend or collapse for portable measurement. Specialized rulers include set squares and triangles for drawing precise right angles and angles, and architect’s or technical scales that display multiple ratio scales on a single tool. Transparent or semi-transparent linjaler are common in drafting because they allow underlying lines to show through.

Markings on linjaler vary. Most display metric graduations in millimeters and centimeters, and many also include dual or imperial scales (inches and fractions). Some rulers feature multiple scales for technical drawing, such as 1:50 or 1:100, enabling users to convert real-world dimensions to a drawing scale. Protective coatings, grip textures, and non-slip backs are sometimes added to improve accuracy and handling.

Linjaler are used for measuring objects, marking straight lines, and assisting in education and professional drawing. Proper care—keeping edges clean, avoiding bending metal rulers, and storing flat—helps preserve accuracy and longevity. See also measuring instruments, drafting tools, set squares, and tapes used for longer measurements.