With a micrometer.
Usually in terms of gauge, 22 ga steel is .0299 in thick, the actual thickness for different materials
varies aluminum of the same gauge is somewhat thinner than steel, galvanized steel is a little thicker than plain steel of the same gauge. A micrometer is one way to measure it, there are gauge plates that have slots for each size.
Sheet metal thickness can be determined by measuring it. Several specialty tools are available to tell how thing the sheet metal is in actual measurement or by guage, a form of measurement that is used for various types of sheet metal thickness.
Measure the thickness of multiple sheets (Say, ten or twenty) then divide the answer by the number of sheets to get the thickness of a single sheet.
ON the cad offset the bend radius from the internal radius of the sheet metal part by 40% of the total sheet thickness,and measure the chord length of the radius. that will be the developed length.
.0229
Micrometer.
If it is steel, the thickness is 0.0359 ins (35.9 thou), or 0.9119 mm. See Wikipedia 'Sheet Metal Gauge' for a full table of thicknesses
deceptive mesurment
stack up 100 of the same type of piece of paper, measure the thickness with a very accurate ruler, divide this thickness by 100
The blank size of sheet metal can be calculated using the bend allowance. This number is based on the metal thickness and the tool radius in the brake.
meter
Sheet metal is metal formed by an industrial process into thin, flat pieces. Sheet metal is one of the fundamental forms used in metalworking, and it can be cut and bent into a variety of shapes. Countless everyday objects are fabricated from sheet metal. Thicknesses can vary significantly.
Sheet metal thickness can be measured in mm. Sheet's thickness is very less.