Geotextile Materials Selection

Mesh to Micron Conversion

Geotextiles are available in a range of woven and nonwoven fabrics to accommodate applications that require stabilization, aggregate separation, or filtration. As one of the top U.S. geotextile fabric suppliers, GEI Works offers a variety of geotextile materials for many applications and industries. The geotextile function depends widely on the micron sizes and fabric make.

When choosing geotextile types, one of the most commonly asked questions concerns US sieve mesh size to micron size. To answer the question, a mesh to micron size chart is available below for some of our standard fabrics:

Available Geotextiles Types

Nonwoven Geotextiles Woven Geotextiles
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Questions about geotextile materials? We can help! Call the GEI Works team at +1-772-646-0597 or submit a form.

Complete Mesh Size to Micron Chart

Listed on all of our geotextile materials specification charts is a property called AOS or Apparent Opening Size. The value for the AOS will be listed in US Sieve. Match the US Sieve for your fabric to find the size in inches, millimeters and microns.

U.S. Sieve Inches Microns Millimeters
3 0.2650 6730 6.730
4 0.1870 4760 4.760
5 0.1570 4000 4.000
6 0.1320 3360 3.360
7 0.1110 2830 2.830
8 0.0937 2380 2.380
10 0.0787 2000 2.000
12 0.0661 1680 1.680
14 0.0555 1410 1.410
16 0.0469 1190 1.190
18 0.0394 1000 1.000
20 0.0331 841 0.841
25 0.0280 707 0.707
30 0.0232 595 0.595
35 0.0197 500 0.500
40 0.0165 400 0.400
45 0.0138 354 0.354
50 0.0117 297 0.297
60 0.0098 250 0.250
70 0.0083 210 0.210
80 0.0070 177 0.177
100 0.0059 149 0.149
120 0.0049 125 0.125
140 0.0041 105 0.105
170 0.0035 88 0.088
200 0.0029 74 0.074
230 0.0024 63 0.063
270 0.0021 53 0.053
325 0.0017 44 0.044
400 0.0015 37 0.037

Geotextile Micron Size Chart

Fabric US Sieve (AOS) Micron Sizes
3.1 oz. Nonwoven 50 297
3.5 oz. Nonwoven 50 297
4 oz. Nonwoven 70 210
6 oz. Nonwoven 70 210
8 oz. Nonwoven 80 177
10 oz. Nonwoven 100 149
12 oz. Nonwoven 100 149
16 oz. Nonwoven 100 149
Woven 200 40 400
Woven 315 40 400

Material Micron Sizes

The chart below is designed to serve as a guide for classifying your material with micron/US Sieve rating.

US Sieve Micron Size Typical Material
28 700 Beach Sand
60 250 Fine Sand
200 74 Portland Cement
325 44 Silt


Questions about woven vs. nonwoven geotextile fabric? We can help! Call our team at +1-772-646-0597 or submit a form.

Geotextile Materials Application Chart

To help select woven vs. nonwoven geotextile fabric for various applications, the following table has been developed. Geotextile Fabrics are manufactured in different weights to accommodate specific project needs for durability, drainage, and other factors. GEI Works is a one of the top geotextile fabric suppliers, so contact our knowledgeable staff for help after reviewing the chart.

Product Type Application
Nonwoven Fabric
  • Subsurface Drainage and Filtration
  • Erosion Protection
  • Asphalt Overlays
  • Stabilization and Separation
  • Railroads Only Use Heavy Weight Nonwovens
  • Pond Underlayments
Woven Slit Film Fabric
  • Stabilization and Separation
  • Silt Fence
Woven Monofilament Fabric
  • Subsurface Drainage and Erosion Protection (mainly in gap graded soils)
High Strength Wovens
  • Stabilization and Reinforcement
Grids
  • Stabilization and Reinforcement
Drainage Nets
  • In-Plane Drainage (when combined with light weight nonwovens)
Pre-Fabricated Drainage Structure
  • Subsurface Drainage
Matting
  • Erosion Protection
Combination of Grids and Nonwoven Fabric
  • Special Stabilization and Reinforcements Where Separation is Needed (i.e. under sewer lines or in soils prone to pumping)

Natural Fiber Products

As an alternative to synthetic geotextile materials, coir can also be implemented to help with erosion control and stabilization in your location. Unlike geotextiles, coir is a natural, biodegradable product. Our coir offerings include:

Need help determining which geotextile material will work best for your location? Give us a call at +1-772-646-0597 or submit a form.