Woven Mesh Opening
Convert with explicit units, definitions and assumptions.
Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Geometric estimate for square woven mesh. This is not an ASTM/ISO sieve-number certification.
Example Calculation
- Mesh count: 100 wires per inch
- Wire diameter: 0.1 mm
100 wires/inch with 0.1 mm wire leaves a nominal opening of 154 µm.
Method references
Frequently asked questions
How do I use this calculator?
Enter mesh count, wire diameter. The result updates automatically. Use Reset to restore the example values.
What method does it use?
opening(µm) = (25.4 / mesh count − wire diameter) × 1000. Geometric estimate for square woven mesh. This is not an ASTM/ISO sieve-number certification.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.