Gauge (or gage) sizes are numbers that indicate the thickness of a piece of sheet metal,
with a higher number referring to a thinner sheet. The equivalent thicknesses differ for each gauge size
standard, which were developed based on the weight of the sheet for a given material. The Manufacturers'
Standard Gage provides the thicknesses for standard steel, galvanized steel, and stainless steel. The Brown
and Sharpe Gage, also known as the American Wire Gage (AWG), is used for most non ferrous metals, such as
Aluminum and Brass. In the UK, the Birmingham Gage (BG) is used for a variety of metals and should not be
confused with the Birmingham Wire Gage (BWG), which is used for wires. Lastly, a standard exists for Zinc in
which a higher gauge number indicates a thicker sheet. The chart below can be used to determine the equivalent
sheet thickness, in inches or millimeters, for a gauge number from the selected gauge size standard. The weight
per unit area of the sheet can also be seen in pounds per square foot and kilograms per square meter.
Gauge size standard:
Thickness
Weight Per Area
Gauge
in
mm
lb/ft²
kg/m²
30.23916.0739.75447.624
40.22425.6959.14644.656
50.20925.3148.53441.668
60.19434.9357.92738.701
70.17934.5547.31535.713
80.16444.1766.70732.745
90.14953.7976.09929.777
100.13453.4165.48726.790
110.11963.0384.87923.822
120.10462.6574.26720.834
130.08972.2783.65917.866
140.07471.8973.04714.879
150.06731.7092.74613.405
160.05981.5192.44011.911
170.05381.3672.19510.716
180.04781.2141.9509.521
190.04181.0621.7058.326
200.03590.9121.4657.151
210.03290.8361.3426.553
220.02990.7591.2205.955
230.02690.6831.0975.358
240.02390.6070.9754.760
250.02090.5310.8534.163
260.01790.4550.7303.565
270.01640.4170.6693.267
280.01490.3780.6082.968
290.01350.3430.5512.689
300.01200.3050.4902.390
310.01050.2670.4282.091
320.00970.2460.3961.932
330.00900.2290.3671.793
340.00820.2080.3351.633
350.00750.1910.3061.494
360.00670.1700.2731.335
370.00640.1630.2611.275
380.00600.1520.2451.195
Thickness
Weight Per Area
Gauge
in
mm
lb/ft²
kg/m²
80.16814.2706.85833.482
90.15323.8916.25030.514
100.13823.5105.63827.527
110.12333.1325.03024.559
120.10842.7534.42221.591
130.09342.3723.81018.603
140.07851.9943.20215.636
150.07101.8032.89614.142
160.06351.6132.59012.648
170.05751.4612.34611.453
180.05161.3112.10510.278
190.04561.1581.8609.083
200.03961.0061.6157.888
210.03660.9301.4937.290
220.03360.8531.3716.692
230.03060.7771.2486.095
240.02760.7011.1265.497
250.02470.6271.0084.920
260.02170.5510.8854.322
270.02020.5130.8244.023
280.01870.4750.7633.725
290.01720.4370.7023.426
300.01570.3990.6403.127
310.01420.3610.5792.828
320.01340.3400.5472.669
Thickness
Weight Per Area
Gauge
in
mm
lb/ft²
kg/m²
00000000.500012.70020.808101.594
0000000.468611.90219.50195.213
000000.437511.11318.20788.894
00000.406310.32016.90982.555
0000.37509.52515.60676.195
000.34388.73314.30869.856
00.31257.93813.00563.496
10.28137.14511.70757.157
20.26566.74611.05353.966
30.25006.35010.40450.797
40.23445.9549.75547.627
50.21875.5559.10144.437
60.20315.1598.45241.267
70.18754.7637.80338.098
80.17194.3667.15434.928
90.15623.9676.50031.738
100.14063.5715.85128.568
110.12503.1755.20225.398
120.10942.7794.55322.229
130.09372.3803.89919.039
140.07811.9843.25015.869
150.07031.7862.92614.284
160.06251.5882.60112.699
170.05621.4272.33911.419
180.05001.2702.08110.159
190.04371.1101.8198.879
200.03750.9531.5617.620
210.03440.8741.4326.990
220.03120.7921.2986.339
230.02810.7141.1695.710
240.02500.6351.0405.080
250.02190.5560.9114.450
260.01870.4750.7783.800
270.01720.4370.7163.495
280.01560.3960.6493.170
290.01410.3580.5872.865
300.01250.3180.5202.540
310.01090.2770.4542.215
320.01020.2590.4242.073
330.00940.2390.3911.910
340.00860.2180.3581.747
350.00780.1980.3251.585
360.00700.1780.2911.422
370.00660.1680.2751.341
380.00620.1570.2581.260
Thickness
Weight Per Area
Gauge
in
mm
lb/ft²
kg/m²
0000000.580014.7328.18539.962
000000.516513.1197.28935.587
00000.460011.6846.49231.694
0000.409610.4045.78028.222
000.36489.2665.14825.135
00.32498.2524.58522.386
10.28937.3484.08319.933
20.25766.5433.63517.749
30.22945.8273.23715.806
40.20435.1892.88314.076
50.18194.6202.56712.533
60.16204.1152.28611.162
70.14433.6652.0369.942
80.12853.2641.8138.854
90.11442.9061.6147.882
100.10192.5881.4387.021
110.09072.3041.2806.249
120.08082.0521.1405.567
130.07201.8291.0164.961
140.06411.6280.9054.417
150.05711.4500.8063.934
160.05081.2900.7173.500
170.04531.1510.6393.121
180.04031.0240.5692.777
190.03590.9120.5072.474
200.03200.8130.4522.205
210.02850.7240.4021.964
220.02530.6430.3571.743
230.02260.5740.3191.557
240.02010.5110.2841.385
250.01790.4550.2531.233
260.01590.4040.2241.096
270.01420.3610.2000.978
280.01260.3200.1780.868
290.01130.2870.1590.779
300.01000.2540.1410.689
310.00890.2260.1260.613
320.00800.2030.1130.551
330.00710.1800.1000.489
340.00630.1600.0890.434
350.00560.1420.0790.386
360.00500.1270.0710.345
370.00450.1140.0640.310
380.00400.1020.0560.276
390.00350.0890.0490.241
400.00310.0790.0440.214
Thickness
Weight Per Area
Gauge
in
mm
lb/ft²
kg/m²
281.000025.40037.152181.392
270.500012.70018.57690.696
260.37509.52513.93268.022
250.25006.3509.28845.348
240.12503.1754.64422.674
230.10002.5403.71518.139
220.09002.2863.34416.325
210.08002.0322.97214.511
200.07001.7782.60112.697
190.06001.5242.22910.884
180.05501.3972.0439.977
170.05001.2701.8589.070
160.04501.1431.6728.163
150.04001.0161.4867.256
140.03600.9141.3376.530
130.03200.8131.1895.805
120.02800.7111.0405.079
110.02400.6100.8924.353
100.02000.5080.7433.628
90.01800.4570.6693.265
80.01600.4060.5942.902
70.01400.3560.5202.539
60.01200.3050.4462.177
50.01000.2540.3721.814
40.00800.2030.2971.451
30.00600.1520.2231.088
20.00400.1020.1490.726
10.00200.0510.0740.363
Thickness
Gauge
in
mm
00000000.666616.932
0000000.625015.875
000000.588314.943
00000.541613.757
0000.500012.700
000.445211.308
00.396410.069
10.35328.971
20.31477.993
30.28047.122
40.25006.350
50.22255.652
60.19815.032
70.17644.481
80.15703.988
90.13983.551
100.12503.175
110.11132.827
120.09912.517
130.08822.240
140.07851.994
150.06991.775
160.06251.588
170.05561.412
180.04951.257
190.04401.118
200.03920.996
210.03490.886
220.03120.792
230.02780.706
240.02470.627
250.02200.559
260.01960.498
270.01740.442
280.01560.396
290.01390.353
300.01230.312
310.01100.279
320.00980.249
330.00870.221
340.00770.196
350.00690.175
360.00610.155
370.00540.137
380.00480.122
390.00430.109
400.00380.097
410.00340.086
420.00300.076
430.00270.069
440.00240.061
450.00210.053
460.00190.048
470.00170.043
480.00160.041
490.00130.033
500.00120.030
510.00110.027
520.00100.024
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How thick is 16 gauge steel
For metal thickness calculation, it’s very confusing to many people that steel sheet thickness is measured using a method that appears counter-intuitive. As regular measurements increase in number, so do weight and thickness.
In fact, not right in metal thickness calculation! The thickness of the metal sheet stock is measured in Gauge, and Gauge refers back to a system in which the physical measurement properties decrease as the rating number increases.
But the gauge measuring system is the opposite of flexible plastic measurement. When we do the flexible plastic thickness measurements, the physical number increases with an increase in thickness.
Fun-Fact – how thick is 16 gauge steel
It’s excellent information! Few people understand why steel or metal thickness decreases as the gauge increases (i.e., 16 gauge thickness Mild Steel sheet is higher thickness than 20 gauge steel).
Explanation of 16 gauge steel thickness: The story comes from the early evolution of a steel gauge determination method that used the specific measurement on a 1″ thick steel plate.
The 1″ thickness of the metal(Steel) was measured by reducing fractions numbers such as 1/14″ thick, 1/16″ thick, 1/20″ thick, and so on. The below number became an easy identifier and eventually was adopted as the “gauge number.”
Thus, 1/16″ shifted 16 gauge, and 1/20″ shifted 20 gauge. The thought makes sense, but without explanation, the converse number is usually confusing by taking the gauge number and turning it into a fractional format.
Let’s also understand the gauge theory explanation for the calculation of flexible plastic thickness.
When it comes to applying plastic or material, thickness comes into consideration. To find a way to convert plastic flexible film thickness gauge having the relationship between Mil, mm, and gauge unit, check out the plastic gauge thickness chart and calculation formula.
So, what is Plastic Gauge Thickness?
The plastic film thickness is frequently described as Gauge, or calculated in Mil unit, equivalent to a thousand an inch. Other ways to express plastic thickness are including Micron and mm(Millimeter) units.
It displays the plastic material’s thickness correctly in any place and time; there is a plastic gauge thickness chart to help you move among these units.
For newcomers to design and making, lots of plastic measurement variations may be confusing; the conversion chart can ensure they find the material’s proper thickness.
Plastic Gauge Thickness Chart – Plastic Film/Sheet Thickness Gauge Conversion
The conversion relationship between these thickness units is: a Mil is 1000 times an inch, and the Gauge is (100) x (Mils). To go from Mils to Microns, it needs to multiply mils x 25.4.
So the calculation formulas for plastic Gauge are as below.
Mil = 1000 x Inch
Micron = Mil x 25.4
Micron = Gauge x 0.254
Gauge = 100 x Mil
Gauge = Micron x 3.937
GaugeMilMicronMillimeterInch300.307.6200.00760.0003350.358.8900.00890.0004400.4010.1600.01020.0004450.4511.4300.01140.0005500.5012.7000.01270.0005550.5513.9700.01400.0006600.6015.2400.01520.0006650.6516.5100.01650.0007700.7017.7800.01780.0007750.7519.0500.01910.0008800.8020.3200.02030.0008850.8521.5900.02160.0009900.9022.8600.02290.0009950.9524.1300.02410.00101001.0025.4000.02540.00101101.1027.9400.02790.00111201.2030.4800.03050.00121301.3033.0200.03300.00131401.4035.5600.03560.00141501.5038.1000.03810.00151601.6040.6400.04060.00161701.7043.1800.04320.00171801.8045.7200.04570.00181901.9048.2600.04830.00192002.0050.8000.05080.00202102.1053.3400.05330.00212202.2055.8800.05590.00222302.3058.4200.05840.00232402.4060.9600.06100.00242502.5063.5000.06350.00252602.6066.0400.06600.00262702.7068.5800.06860.00272802.8071.1200.07110.00282902.9073.6600.07370.00293003.0076.2000.07620.0030
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