What is the formula to convert mesh to microns?

The standard formula is: Microns = 25,400 ÷ Mesh Size. For example, 400 mesh = 25,400 ÷ 400 = 63.5 microns (theoretical). In practice, actual particle sizes are slightly smaller due to wire thickness and sieving efficiency, so we also show practical values in the converter.

What is 600 mesh to micron?

The theoretical size for 600 mesh is 25,400 ÷ 600 ≈ 42.3 microns. In practical industrial use, 600 mesh is typically treated as about 20 microns because particles must be smaller than the sieve opening to pass consistently.

What is 1000 mesh to micron?

The theoretical size for 1000 mesh is 25,400 ÷ 1000 = 25.4 microns. Practical particle sizes for 1000 mesh fillers are usually around 10 microns for calcite and GCC.

How do I convert microns to mesh size?

To convert microns to mesh, use the inverse formula: Mesh Size = 25,400 ÷ Microns. For example, 38 microns corresponds theoretically to about 668 mesh, but in practice is associated with 400 mesh for mineral fillers. Our converter uses a practical lookup table to return realistic mesh values.

Mesh to Micron Converter Online - Free Calculator Tool

Convert 600 mesh to micron, 800 mesh to micron, and any mesh size instantly. Free online calculator for calcite powder, dolomite powder, and industrial mineral particle size calculations.

Particle size is often specified in mesh (e.g. 400 mesh, 800 mesh) or microns. Our calcite and dolomite powders are available in a range of mesh sizes; use this tool to convert between units. For a full reference, see our mesh to micron conversion chart and how to calculate mesh size.

Enter Mesh Size:

Conversion Result

Enter a mesh size to see the result

Formula: Microns = 25,400 ÷ Mesh Size

Enter Micron Size:

Conversion Result

Enter a micron size to see the result

Formula: Mesh = 25,400 ÷ Microns

What is Mesh Size?

Mesh size refers to the number of openings per linear inch in a sieve. Higher mesh numbers indicate finer particles.

What are Microns?

A micron (μm) is one-millionth of a meter. It's the standard unit for measuring particle sizes in industrial applications.

Conversion Formula

Microns = 25,400 ÷ Mesh Size
Mesh Size = 25,400 ÷ Microns

Quick Reference Table

Mesh Size	Theoretical (µm)	Practical (µm)	Typical Applications	Calcite/Dolomite Use
200	127	74	Coarse fillers, construction	Building materials, concrete
300	84.7	50	Standard industrial use	General purpose fillers
400	63.5	38	Paints, plastics, rubber	Most common for industrial use
500	50.8	25	Fine applications	Premium paints, fine plastics
600	42.3	20	High-end coatings	Premium coatings, fine papers
800	31.8	15	Ultra-fine applications	High-end paints, smooth finishes
1000	25.4	10	Superfine applications	Premium paper coatings
1200	21.2	8	Ultra-premium applications	Specialty coatings
1500	16.9	5	Nano-level applications	High-end specialty products

How to Use This Calculator

Enter any mesh size (1-2000)
Get instant micron conversion
View typical applications
Perfect for mineral selection

Pro Tips

400-600 mesh is most common
Smaller particles = smoother finish
Higher mesh = higher cost
Consider your application needs

GSM to Micron Conversion Calculator

Looking for a GSM to micron conversion calculator? GSM (grams per square metre) and microns (µm) measure different properties — GSM measures paper/film weight per area, while microns measure particle size or film thickness. Here's how they relate:

For paper and films: Thickness (microns) = GSM ÷ Density (g/cm³). For example, 80 GSM paper with density 1.2 g/cm³ ≈ 67 microns thick.
For mineral powders: GSM is not directly applicable — use mesh-to-micron conversion instead. Our converter above handles this: enter the mesh number to get microns.

For mesh to micron conversion (mineral powder particle sizes), use the calculator above. For paper/film GSM to micron thickness, divide GSM by the material density. For a full reference, see our mesh to micron conversion chart and how to calculate mesh size.

Related Resources

Mesh Size Conversion Chart

Full reference table, formula, and how to calculate mesh size. See our conversion chart.

View Chart

Mesh Size Selection Guide

Choosing the right mesh size for your application.

Read Guide

Calcite vs Dolomite

Compare calcite and dolomite powder properties.

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