Convert Micrometres per Pascal Second to Frazier (cfm/ft²)
1 micrometre per pascal second (µm/(Pa·s)) = 0.02460629921 Frazier (cfm/ft² at 125 Pa) (cfm/ft² @125 Pa). 1 cfm/ft² @125 Pa = 40.64 µm/(Pa·s). Example: 15 µm/(Pa·s) = 15 × 0.02460629921 = 0.3690944882 cfm/ft² @125 Pa.
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1 µm/(Pa·s) = 0.02460629921 cfm/ft² @125 Pa
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk micrometre per pascal second to Frazier converter to paste a column from Excel.
How to Convert Micrometre per Pascal Second to Frazier (cfm/ft²)
- 1 µm/(Pa·s) = 0.02460629921 cfm/ft² @125 Pa
- 1 cfm/ft² @125 Pa = 40.64 µm/(Pa·s)
- Example: convert 15 µm/(Pa·s) to cfm/ft² @125 Pa: 15 µm/(Pa·s) = 15 × 0.02460629921 cfm/ft² @125 Pa = 0.3690944882 cfm/ft² @125 Pa
Reference conditions. cfm/ft² @125 Pa: Measured at 125 Pa (0.5 inH₂O) as in ASTM D737; assumes flow proportional to pressure difference.
Formula
cfm/ft² @125 Pa = µm/(Pa·s) × 0.0246062992126
or cfm/ft² @125 Pa = µm/(Pa·s) ÷ 40.64
Derivation from SI units:
- Air permeance P = flow per unit area per unit pressure difference = 10⁻⁶ m/(Pa·s) (ISO 5636-1).
- 1 cfm/ft² = 0.00508 m/s; at 125 Pa that is 0.00508 ÷ 125 = 4.064 × 10⁻⁵ m/(Pa·s) = 40.64 µm/(Pa·s).
One unit is a measured value, so the factor is approximate. Micrometre per Pascal Second definition: micrometre per pascal second; Frazier (cfm/ft²) definition: Frazier (cfm/ft² at 125 Pa).
Worked examples
- A reading of 1 µm/(Pa·s) converts to 0.02460629921 cfm/ft² @125 Pa.
1 µm/(Pa·s) × 0.02460629921 = 0.02460629921 cfm/ft² @125 Pa - A value of 10 µm/(Pa·s) is 0.2460629921 cfm/ft² @125 Pa.
10 µm/(Pa·s) × 0.02460629921 = 0.2460629921 cfm/ft² @125 Pa
Micrometre per Pascal Second to Frazier (cfm/ft²) conversion table
| Micrometres per Pascal Second (µm/(Pa·s)) | Frazier (cfm/ft²) (cfm/ft² @125 Pa) |
|---|---|
| 0.01 µm/(Pa·s) | 0.0002460629921 cfm/ft² @125 Pa |
| 0.1 µm/(Pa·s) | 0.002460629921 cfm/ft² @125 Pa |
| 0.5 µm/(Pa·s) | 0.01230314961 cfm/ft² @125 Pa |
| 1 µm/(Pa·s) | 0.02460629921 cfm/ft² @125 Pa |
| 2 µm/(Pa·s) | 0.04921259843 cfm/ft² @125 Pa |
| 5 µm/(Pa·s) | 0.1230314961 cfm/ft² @125 Pa |
| 10 µm/(Pa·s) | 0.2460629921 cfm/ft² @125 Pa |
| 20 µm/(Pa·s) | 0.4921259843 cfm/ft² @125 Pa |
| 50 µm/(Pa·s) | 1.230314961 cfm/ft² @125 Pa |
| 100 µm/(Pa·s) | 2.460629921 cfm/ft² @125 Pa |
Where it's used
Micrometres per Pascal Second are used for paper and board air permeance (ISO 5636), while Frazier (cfm/ft² at 125 Pa) appear in woven and nonwoven filter media. Both measure air permeance (air flow per unit area per unit pressure difference), so the conversion is a fixed factor.
Micrometre per Pascal Second to other air permeance units
| Conversion | 1 µm/(Pa·s) equals |
|---|---|
| micrometre per pascal second to Frazier | 0.02460629921 cfm/ft² @125 Pa |
| micrometre per pascal second to Gurley second | 127.0809506 s/100 mL |
| micrometre per pascal second to Bendtsen | 88.2 mL/min (Bendtsen) |
| micrometre per pascal second to millimetre per second at 100 Pa | 0.1 mm/s @100 Pa |
| micrometre per pascal second to millimetre per second at 200 Pa | 0.2 mm/s @200 Pa |
Frequently asked questions
How many Frazier (cfm/ft² at 125 Pa) are in 1 micrometre per pascal second?
1 µm/(Pa·s) = 0.02460629921 cfm/ft² @125 Pa.
How do I convert micrometres per pascal second to Frazier (cfm/ft² at 125 Pa)?
Multiply the value in µm/(Pa·s) by 0.02460629921, or divide it by 40.64. For example, 15 µm/(Pa·s) × 0.02460629921 = 0.3690944882 cfm/ft² @125 Pa.
Is the µm/(Pa·s) to cfm/ft² @125 Pa conversion exact?
Not exactly. The Frazier (cfm/ft² at 125 Pa) is a measured value (Measured at 125 Pa (0.5 inH₂O) as in ASTM D737; assumes flow proportional to pressure difference.). Results are good to about 5 significant figures.
Sources
- ISO 5636 Paper and board — Determination of air permeance (Part 3: Bendtsen method; Part 5: Gurley method), International Organization for Standardization , Part 1, definition of air permeance.
- ASTM D737 Standard Test Method for Air Permeability of Textile Fabrics, ASTM International .
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Micrometres per Pascal Second to Frazier (cfm/ft²). Retrieved October 29, 2026, from https://scientificconverters.com/air-permeance/micrometers-per-pascal-second-to-frazier/
IEEE
Scientific Converters, "Convert Micrometres per Pascal Second to Frazier (cfm/ft²)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/air-permeance/micrometers-per-pascal-second-to-frazier/