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WHAT IS MESH TO MICRON CONVERSION?
Mesh to Micron Conversion is the process of converting a mesh size into its equivalent micron (µm) opening size. It helps engineers, procurement professionals, and maintenance teams understand the actual size of particles that a filter screen or wire mesh can retain or allow to pass through.
In simple terms, mesh refers to the number of openings per linear inch in a woven wire screen, while a micron is a unit of measurement equal to one-millionth of a meter (0.001 mm). Since mesh indicates the number of openings and micron indicates the size of those openings, converting between the two makes it easier to select the right filtration screen for a specific application.
For example, a 100 Mesh stainless steel screen has an approximate opening size of 150 microns, meaning it can retain particles larger than about 150 µm under standard conditions. However, the exact micron value can vary depending on the wire diameter, weave pattern, and the applicable manufacturing standard.
Understanding Mesh to Micron Conversion is essential for selecting the correct filter mesh size for industrial filtration systems. Choosing the appropriate mesh improves filtration efficiency, reduces pressure drop, protects pumps and valves, minimizes maintenance, and extends the life of downstream equipment.
This Mesh to Micron Conversion Chart provides a quick and reliable reference for converting mesh sizes to micron values, helping you choose the most suitable screen for water treatment, chemical processing, food & beverage, pharmaceutical, oil & gas, paint, mining, and many other industrial applications.
Note: There is no exact mathematical formula to convert mesh to micron because the final opening size depends on factors such as wire diameter and wire weave. For accurate selection, always refer to a standard Mesh to Micron Conversion Chart or consult the mesh manufacturer.
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Request Assistance ↻| MESH SIZE (US) | OPENING SIZE | WIRE DIAMETER (mm) |
OPEN AREA (%) |
TYPICAL APPLICATIONS | ||
|---|---|---|---|---|---|---|
| MICRONS (µm) | MILLIMETERS (mm) | INCHES (in) | ||||
| 3 | 6,730 | 6.730 | 0.2650 | 1.60 | 81 | Coarse filtration, gravel, stones |
| 5 | 4,000 | 4.000 | 0.1570 | 1.20 | 74 | Coarse filtration, sand |
| 10 | 2,000 | 2.000 | 0.0787 | 0.80 | 64 | Water treatment, general filtration |
| 16 | 1,190 | 1.190 | 0.0469 | 0.56 | 60 | Water filters, strainers |
| 20 | 840 | 0.840 | 0.0331 | 0.46 | 56 | Liquid filtration, pump filters |
| 30 | 590 | 0.590 | 0.0232 | 0.32 | 53 | Fine filtration, chemicals |
| 40 | 420 | 0.420 | 0.0165 | 0.28 | 51 | Chemical processing, pharmaceutical filtration |
| 50 | 297 | 0.297 | 0.0117 | 0.23 | 48 | Food & Beverage processing, liquid filtration |
| 60 | 250 | 0.250 | 0.0098 | 0.18 | 47 | General industrial filtration |
| 70 | 210 | 0.210 | 0.0083 | 0.16 | 46 | Hydraulic systems, process filtration |
| 80 | 177 | 0.177 | 0.0070 | 0.14 | 45 | Valve protection, cooling water systems |
| 100 | 149 | 0.149 | 0.0059 | 0.10 | 44 | Fine filtration, Y Type Strainers |
| 120 | 125 | 0.125 | 0.0049 | 0.09 | 43 | Chemical transfer, fine process filtration |
| 140 | 105 | 0.105 | 0.0041 | 0.08 | 42 | Fine filtration for industrial liquids |
| 170 | 88 | 0.088 | 0.0035 | 0.06 | 41 | Paints, coatings, pigments |
| 200 | 74 | 0.074 | 0.0029 | 0.053 | 40 | Pharmaceutical, precision filtration |
| 230 | 63 | 0.063 | 0.0025 | 0.043 | 39 | Specialty chemicals |
| 270 | 53 | 0.053 | 0.0021 | 0.040 | 38 | Fine powder processing |
| 325 | 44 | 0.044 | 0.0017 | 0.05 | 33 | Pharmaceuticals, inks |
| 400 | 37 | 0.037 | 0.0015 | 0.06 | 32 | Ultra Fine Filtration |
| 500 | 25 | 0.025 | 0.0010 | 0.03 | 30 | Special Fine Filtration |
| 1000 | 15 | 0.015 | 0.0006 | 0.02 | 28 | Micron Level Filtration |
| ⓘ Note: Values are approximate and may vary depending on wire diameter, weaving pattern, and manufacturer specifications. | ||||||
HOW TO USE THIS CHART
1. Identify Requirement
Know the particle size (in microns) you want to remove from your fluid or process.
2. Find the Micron Size
Locate the micron size in the chart that matches your filtration requirement.
3. Select Mesh Size
Choose the corresponding mesh size that provides the required filtration.
4. Validate & Apply
Verify other factors like wire diameter, open area and pressure drop for final selection.
UNDERSTANDING MESH AND MICRON
What is Mesh?
Mesh refers to the number of openings per linear inch in a screen.
Example:
100 mesh means there are 100 openings per inch.
What is Micron?
Micron (µm) is a unit of length equal to one millionth of a meter.
It defines the actual size of the opening in the mesh.
Mesh vs Micron
As the mesh number increases, the opening size (microns) decreases.
Factors Affecting Filtration
- ✓Mesh Size / Micron Rating
- ✓Wire Diameter
- ✓Open Area (% of free flow)
- ✓Fluid Viscosity
- ✓Pressure Differential
- ✓Type of Contaminant
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FREQUENTLY ASKED QUESTIONS
What is the difference between mesh and micron?
Mesh and micron are two different methods of measuring particle or opening size.
- Mesh refers to the number of openings per linear inch of a screen.
- Micron (µm) is the actual size of each opening, where 1 micron equals one-millionth of a meter (0.001 mm).
As the mesh number increases, the opening size generally becomes smaller. However, the exact micron size may vary depending on the wire diameter and weave pattern.
Is a higher mesh number better?
Not necessarily.
A higher mesh number provides finer filtration because it has smaller openings. However, choosing the correct mesh depends on your application.
- 20 Mesh – Coarse filtration
- 60 Mesh – Medium filtration
- 100 Mesh – Fine filtration
- 325 Mesh – Very fine filtration
Using an unnecessarily fine mesh can increase pressure drop and reduce flow rate.
How do I choose the correct mesh size?
Selecting the right mesh depends on several factors:
- Required particle removal size
- Fluid viscosity
- Flow rate
- Pressure drop
- Type of contaminant
- Filtration objective
- Operating temperature
Our Mesh to Micron Conversion Chart provides a useful starting point, but final selection should always consider the complete process conditions.
Does wire diameter affect micron size?
Yes.
Two screens with the same mesh count can have different opening sizes if their wire diameters differ.
- Thicker wire reduces the opening size.
- Thinner wire increases the opening size.
This is why mesh count alone should never be used for critical filtration applications.
What is the open area of a mesh screen?
Open area is the percentage of the screen available for fluid to pass through.
Higher open area offers:
- Better flow rate
- Lower pressure drop
- Longer service life
- Improved filtration efficiency
The open area depends on both mesh count and wire diameter.
Can I use the same mesh size for all applications?
No.
Different industries require different filtration levels based on the process and contaminants involved.
Typical mesh recommendations include:
- Water Treatment – 20 to 80 Mesh
- Oil & Gas – 40 to 100 Mesh
- Chemical Processing – 60 to 200 Mesh
- Food & Beverage – 80 to 150 Mesh
- Pharmaceutical – 100 to 325 Mesh
Always select the mesh size according to your process requirements, filtration objective, and operating conditions.
What is the relationship between mesh size and micron size?
Mesh size and micron size are inversely related.
- As the mesh number increases, the opening size decreases.
- Smaller openings capture finer particles.
Approximate Mesh to Micron Conversion:
- 10 Mesh – 2,000 µm
- 20 Mesh – 840 µm
- 40 Mesh – 420 µm
- 60 Mesh – 250 µm
- 100 Mesh – 149 µm
- 200 Mesh – 74 µm
- 325 Mesh – 44 µm
These values are approximate and may vary depending on the wire diameter, weave pattern, and manufacturer.
Why are mesh-to-micron conversions only approximate?
There is no universal mesh-to-micron conversion because the actual opening size depends on several factors:
- Wire diameter
- Weave pattern
- Manufacturing tolerances
- Material type
- International standards
For this reason, mesh-to-micron conversion charts should be used as a practical reference rather than an exact specification.
What does micron mean?
A micron (µm) is a unit of length equal to:
- 0.001 millimeter
- 0.000039 inch
- One-millionth of a meter
Microns are commonly used to specify filter ratings and particle sizes in industrial filtration applications.
What industries use mesh-to-micron conversion charts?
Mesh-to-micron conversion charts are widely used across many industries, including:
- Water Treatment
- Oil & Gas
- Chemical Processing
- Pharmaceutical
- Food & Beverage
- Paint & Ink
- Mining
- Power Plants
- HVAC
- Marine
- Pulp & Paper
- Process Industries
These charts help engineers and maintenance teams select the appropriate filtration media for their applications.
Which is more accurate—mesh or micron?
Micron is generally more accurate.
Micron measures the actual opening size of the filter media, whereas mesh simply indicates the number of openings per linear inch.
- Mesh does not account for wire thickness.
- Micron provides a more precise filtration specification.
For critical filtration applications, micron rating is the preferred measurement.
What mesh size removes sand?
The recommended mesh size depends on the sand particle size:
- Fine Sand – 40 to 60 Mesh
- Medium Sand – 20 to 40 Mesh
- Coarse Sand – 10 to 20 Mesh
The ideal mesh size should be selected based on the particle size distribution and the process flow conditions.
What mesh size is commonly used for water filtration?
Common mesh sizes used in water filtration include:
- 20 Mesh
- 40 Mesh
- 60 Mesh
- 80 Mesh
- 100 Mesh
The most suitable mesh depends on the contaminants being removed, the required filtration efficiency, and the system operating conditions.
What is the difference between nominal and absolute filtration?
Nominal filtration removes a high percentage of particles at the rated size, but not all of them.
Absolute filtration is designed to remove nearly all particles at the specified size under defined test conditions.
- Nominal filtration is suitable for general-purpose applications.
- Absolute filtration is preferred for critical processes requiring maximum particle removal.
The appropriate filtration rating depends on the cleanliness requirements of your application.
Does a finer mesh always improve filtration?
Not always.
A finer mesh provides smaller openings but may also affect overall system performance.
- Reduce flow rate
- Increase pressure drop
- Require more frequent cleaning
- Increase maintenance costs
The best mesh size is the one that balances filtration efficiency with flow performance and operating costs.
How often should industrial strainers be cleaned?
Cleaning frequency depends on several operating factors, including:
- Contaminant load
- Fluid type
- Flow rate
- Pressure differential
- Operating conditions
A rising differential pressure across the strainer is one of the most common indicators that cleaning or maintenance is required.
What materials are mesh screens made from?
Industrial mesh screens are manufactured from a variety of materials to suit different applications.
- Stainless Steel 304
- Stainless Steel 316
- Duplex Stainless Steel
- Monel
- Hastelloy
- Inconel
- Brass
- Bronze
- Carbon Steel (with protective coatings)
Material selection depends on corrosion resistance, operating temperature, pressure, and chemical compatibility.
How do I select the right industrial strainer?
When selecting an industrial strainer, consider the following factors:
- Required micron rating
- Mesh size
- Flow rate
- Pressure rating
- Fluid type
- Temperature
- Connection type
- Material of construction
- Cleaning method
- Installation orientation
Choosing the correct combination ensures reliable filtration, longer service life, and optimal system performance.
Can ASRE Engineering help me choose the right mesh size?
Yes.
Our filtration specialists can help you select the appropriate mesh size, micron rating, and industrial strainer configuration based on your:
- Operating conditions
- Contaminant characteristics
- Flow requirements
- Performance objectives
Contact ASRE Engineering for expert guidance and customized filtration solutions tailored to your application.
Is this Mesh to Micron Conversion Chart accurate?
Yes. This Mesh to Micron Conversion Chart is designed as a reliable engineering reference based on commonly accepted industry values.
However, actual opening dimensions may vary depending on:
- Wire diameter
- Weave pattern
- Manufacturing tolerances
- Industry standards
For critical filtration applications, always verify the specifications with the mesh manufacturer or consult the ASRE Engineering team for technical assistance.
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