The inch-based measurement system (also known as the imperial system) is primarily used in countries such as the United States, the United Kingdom (in certain industries), Canada (partially), and in international industries, especially in sectors with strong ties to the U.S. Here are the key industries where inch-based measurements are commonly used:

1. Aerospace Industry

The dimensions of aircraft and space components are often given in inches, especially in the U.S. (e.g., bolts, hydraulic pipes, sheet thicknesses).

NASA and American aerospace companies (such as Boeing and Lockheed Martin) still use the imperial system in their projects.

2. Automotive Industry

In the U.S., many car parts (e.g., bolt sizes, tire sizes, threads) are still measured in inches.

European and Asian automotive companies primarily use the metric system, but inch-based measurements remain popular in the aftermarket and tuning industry.

3. Construction and Engineering

In the U.S. and Canada, construction plans and materials (e.g., pipes, lumber, bolts) are measured in inches and feet.

Popular sizes of drywall and plywood sheets include 4x8 feet.

4. Tool and Machinery Manufacturing

Hand tools, wrenches, and bolts made in the U.S. often have inch-based dimensions (e.g., 3/8-inch wrench).

Industrial machines used in the U.S. are often designed based on inch specifications.

5. Electronics and IT Industry

Screen sizes of televisions, monitors, and laptops are measured in inches (e.g., 15.6 inches, 27 inches).

Cable diameters and pin spacing in integrated circuits (e.g., 2.54 mm = 0.1 inch) are often based on the inch system.

Remember that 1 inch is 2.54 cm.

Convert 2.54 cm to millimetres by multiplying this value by 10. So 1 inch is 25.4 mm.