Is the unit of CAD in centimeters or millimeters?

Commonly used units in CAD are millimeters and centimeters. The millimeter unit is suitable for designs with strict size requirements, while the centimeter unit is suitable for designs with relatively loose size requirements. When selecting units, judgment and conversion need to be made based on specific design needs and actual conditions. No matter which unit is chosen, it is necessary to ensure the consistency of the units and pay attention to unit conversion and calculation to ensure the accuracy and quality of the design.

The operating environment of this tutorial: Windows 10 system, AutoCAD 2021 version, Dell G3 computer.

CAD is the abbreviation of computer-aided design. It is an engineering method that uses computer technology to design, analyze, simulate and optimize. In CAD, the choice of length unit is very important because it determines the precision and accuracy of the design. In CAD software, common units are centimeters and millimeters, which may differ in different software and usage scenarios.

Commonly used units in CAD software include millimeters, centimeters, meters and inches. Internationally, millimeter (mm) is one of the most commonly used units, especially suitable for small-size design, such as electronic products, model making, etc. The design accuracy in millimeter units is relatively high and is suitable for areas with high size requirements.

The centimeter (cm) is often used for medium-sized designs, such as furniture, buildings, etc. Compared with millimeters, centimeter units are slightly less accurate and are more common in some designs with relatively loose size requirements.

In CAD software, you can generally choose the units to use freely. Users can choose the appropriate unit based on specific design needs and actual conditions. For example, when drawing a building floor plan, meters (m) are usually chosen as the unit, because the size of buildings is often larger, and the meter unit is more convenient and intuitive.

No matter which unit is used, it needs to be converted and calculated according to the design requirements and actual conditions. CAD software usually provides a unit conversion function, which can easily convert between different units to ensure the consistency and accuracy of the design.

In the design process, it is very important to choose the unit correctly. If the selected unit is inappropriate, it may lead to excessive deviation in design dimensions, affecting the quality and accuracy of the product. Therefore, in CAD design, it is necessary to select appropriate units according to specific application scenarios and design requirements to ensure the accuracy and reliability of the design.

To sum up, the commonly used units in CAD are millimeters and centimeters. The millimeter unit is suitable for designs with strict size requirements, while the centimeter unit is suitable for designs with relatively loose size requirements. When selecting units, judgment and conversion need to be made based on specific design needs and actual conditions. No matter which unit you choose, you need to ensure the consistency of the unit and pay attention to unit conversion and calculation to ensure the accuracy and quality of the design.

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