Mesh to Micron Converter

Convert between mesh size and micron (µm) particle size for sieve screens, filters, and particle analysis.

Last updated: March 2026 | By Patchworkr Team

Input Mesh

Enter a value to see conversion

Standard Conversion Table (US Standard)

Mesh SizeMicron (µm)

4 mesh4750 µm

6 mesh3350 µm

8 mesh2360 µm

10 mesh2000 µm

12 mesh1700 µm

14 mesh1400 µm

16 mesh1180 µm

18 mesh1000 µm

20 mesh850 µm

25 mesh710 µm

30 mesh600 µm

35 mesh500 µm

40 mesh425 µm

45 mesh355 µm

50 mesh300 µm

60 mesh250 µm

70 mesh212 µm

80 mesh180 µm

100 mesh150 µm

120 mesh125 µm

140 mesh106 µm

170 mesh90 µm

200 mesh75 µm

230 mesh63 µm

270 mesh53 µm

325 mesh45 µm

400 mesh38 µm

500 mesh25 µm

635 mesh20 µm

What Is Mesh Size?

Mesh size is a way to describe particle screening and sieve openings. In most standard usage, the mesh number tells you how many openings there are per linear inch of screen. A screen labeled 100 mesh has more openings per inch than a 40 mesh screen, so its openings are smaller and it captures finer material.

Microns (also written as µm or micrometers) are a direct unit of length used to measure particle size. One micron equals one-millionth of a meter. When people search for mesh to micron or micron to mesh, they are usually trying to compare sieve opening sizes with actual particle dimensions.

The relationship between mesh and microns is inverse: higher mesh numbers generally correspond to smaller micron values. For example, 100 mesh is about 150 microns, while 200 mesh is about 75 microns in common US standard references. This is why mesh size charts are widely used in filtration, powder processing, laboratory sieving, mining, food production, chemicals, and pharmaceuticals.

It is important to understand that mesh is not a pure length unit. Mesh depends on the number of openings per inch, and real-world conversion can vary with sieve standard and wire thickness. That is why the most practical way to convert mesh size to microns is to use a standard reference table for exact values and an approximation only when a non-standard input is entered.

Why Mesh and Micron Don’t Convert Exactly

Mesh and micron are not directly interchangeable because mesh measures openings per inch, while microns measure actual size. Wire thickness and sieve construction affect the final opening size, which is why standard charts are used instead of a single exact formula.

How to Use This Mesh to Micron Converter

Convert Mesh to Microns or Microns to Mesh

Step 1: Choose the conversion direction. Use Mesh → Micron when you know the sieve size, or Micron → Mesh when you know the particle size in micrometers.

Step 2: Enter the value you want to convert.

Step 3: The converter first checks the built-in US Standard mesh size chartfor an exact match.

Step 4: If your value is not one of the standard reference points, the tool returns an estimated conversion so you still get a useful working number.

Exact vs Approximate Mesh Conversion

Exact conversion: Uses the standard mesh-to-micron table for known sieve sizes such as 40 mesh, 60 mesh, 100 mesh, 200 mesh, and 400 mesh.

Approximate conversion: For non-standard values, the tool uses the formula Micron ≈ 15000 ÷ Mesh and Mesh ≈ 15000 ÷ Micron.

Approximate values are helpful for quick estimation, but standard tables are the better choice for specification, quality control, and technical documentation.

Why Professionals Use Mesh Charts

Engineers, lab technicians, powder processors, and manufacturers often search for a mesh to micron chart because mesh values do not translate perfectly into microns across every screen type. A standard chart gives fast, practical reference points for screening, grading, filtering, and comparing particle sizes.

Mesh to Micron Conversion Examples

100 Mesh to Microns

100 mesh = 150 µm

This is one of the most common search queries. A 100 mesh screen is often used where a fine, but not ultra-fine, particle separation is needed.

200 Mesh to Microns

200 mesh = 75 µm

200 mesh is significantly finer than 100 mesh and is commonly referenced in powder sizing, filtration, and laboratory analysis.

400 Mesh to Microns

400 mesh = 38 µm

A 400 mesh screen is very fine and is used when much smaller particle sizes must be separated or controlled.

150 Microns to Mesh

150 µm ≈ 100 mesh

This reverse conversion is useful when a technical document gives particle size in microns but your screen or sieve spec is listed in mesh.

Frequently Asked Questions

What does 100 mesh mean?

100 mesh means there are 100 openings per linear inch of screen. In common US standard references, that corresponds to roughly 150 microns.

Is higher mesh finer or coarser?

Higher mesh is finer. More openings per inch means each opening is smaller, so higher mesh numbers correspond to smaller particle sizes.

How do you convert mesh to micron (µm)?

The best method is to use a standard mesh-to-micron chart for exact reference values. For non-standard estimates, a common shortcut is micron ≈ 15000 ÷ mesh.

How do you convert micron (µm) to mesh?

To convert micron to mesh, use a standard reference chart whenever possible. For estimation only, mesh ≈ 15000 ÷ micron can be used.

How many microns is 100 mesh?

100 mesh is approximately 150 microns.

How many microns is 200 mesh?

200 mesh is approximately 75 microns.

Can mesh be converted to microns exactly?

Not universally. Mesh depends on sieve construction and standard, while microns are a direct size measurement. Exact values usually come from standard reference charts, not a single universal equation.

What is the mesh to micron formula?

There is no exact universal formula, but a common approximation is micron ≈ 15000 ÷ mesh. For accurate results, use a standard mesh-to-micron chart.

Are all mesh standards the same?

No. US Standard, Tyler, British, and other systems can differ. This converter is based on a US Standard reference table, which is widely used for practical industrial conversion.