Convert Frazier (cfm/ft²) to Micrometres per Pascal Second
1 Frazier (cfm/ft² at 125 Pa) (cfm/ft² @125 Pa) = 40.64 micrometres per pascal second (µm/(Pa·s)). 1 µm/(Pa·s) = 0.02460629921 cfm/ft² @125 Pa. Example: 15 cfm/ft² @125 Pa = 15 × 40.64 = 609.6 µm/(Pa·s).
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1 cfm/ft² @125 Pa = 40.64 µm/(Pa·s)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk Frazier to micrometre per pascal second converter to paste a column from Excel.
How to Convert Frazier (cfm/ft²) to Micrometre per Pascal Second
- 1 cfm/ft² @125 Pa = 40.64 µm/(Pa·s)
- 1 µm/(Pa·s) = 0.02460629921 cfm/ft² @125 Pa
- Example: convert 15 cfm/ft² @125 Pa to µm/(Pa·s): 15 cfm/ft² @125 Pa = 15 × 40.64 µm/(Pa·s) = 609.6 µm/(Pa·s)
Reference conditions. cfm/ft² @125 Pa: Measured at 125 Pa (0.5 inH₂O) as in ASTM D737; assumes flow proportional to pressure difference.
Formula
µm/(Pa·s) = cfm/ft² @125 Pa × 40.64
Derivation from SI units:
- 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).
- Air permeance P = flow per unit area per unit pressure difference = 10⁻⁶ m/(Pa·s) (ISO 5636-1).
One unit is a measured value, so the factor is approximate. Frazier (cfm/ft²) definition: Frazier (cfm/ft² at 125 Pa); Micrometre per Pascal Second definition: micrometre per pascal second.
Worked examples
- A reading of 5 cfm/ft² @125 Pa converts to 203.2 µm/(Pa·s).
5 cfm/ft² @125 Pa × 40.64 = 203.2 µm/(Pa·s) - A value of 50 cfm/ft² @125 Pa is 2032 µm/(Pa·s).
50 cfm/ft² @125 Pa × 40.64 = 2032 µm/(Pa·s)
Frazier (cfm/ft²) to Micrometre per Pascal Second conversion table
| Frazier (cfm/ft²) (cfm/ft² @125 Pa) | Micrometres per Pascal Second (µm/(Pa·s)) |
|---|---|
| 0.5 cfm/ft² @125 Pa | 20.32 µm/(Pa·s) |
| 1 cfm/ft² @125 Pa | 40.64 µm/(Pa·s) |
| 2 cfm/ft² @125 Pa | 81.28 µm/(Pa·s) |
| 5 cfm/ft² @125 Pa | 203.2 µm/(Pa·s) |
| 10 cfm/ft² @125 Pa | 406.4 µm/(Pa·s) |
| 20 cfm/ft² @125 Pa | 812.8 µm/(Pa·s) |
| 50 cfm/ft² @125 Pa | 2032 µm/(Pa·s) |
| 100 cfm/ft² @125 Pa | 4064 µm/(Pa·s) |
| 200 cfm/ft² @125 Pa | 8128 µm/(Pa·s) |
| 500 cfm/ft² @125 Pa | 20320 µm/(Pa·s) |
Where it's used
Frazier (cfm/ft²) are used for woven and nonwoven filter media, while micrometres per pascal second appear in paper and board air permeance (ISO 5636). Both measure air permeance (air flow per unit area per unit pressure difference), so the conversion is a fixed factor.
Frazier (cfm/ft²) to other air permeance units
| Conversion | 1 cfm/ft² @125 Pa equals |
|---|---|
| Frazier to micrometre per pascal second | 40.64 µm/(Pa·s) |
| Frazier to Gurley second | 3.126991894 s/100 mL |
| Frazier to Bendtsen | 3584.448 mL/min (Bendtsen) |
| Frazier to millimetre per second at 100 Pa | 4.064 mm/s @100 Pa |
| Frazier to millimetre per second at 200 Pa | 8.128 mm/s @200 Pa |
Frequently asked questions
How many micrometres per pascal second are in 1 Frazier (cfm/ft² at 125 Pa)?
1 cfm/ft² @125 Pa = 40.64 µm/(Pa·s).
How do I convert Frazier (cfm/ft² at 125 Pa) to micrometres per pascal second?
Multiply the value in cfm/ft² @125 Pa by 40.64. For example, 15 cfm/ft² @125 Pa × 40.64 = 609.6 µm/(Pa·s).
Is the cfm/ft² @125 Pa to µm/(Pa·s) 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
- ASTM D737 Standard Test Method for Air Permeability of Textile Fabrics, ASTM International .
- 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.
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 Frazier (cfm/ft²) to Micrometres per Pascal Second. Retrieved October 29, 2026, from https://scientificconverters.com/air-permeance/frazier-to-micrometers-per-pascal-second/
IEEE
Scientific Converters, "Convert Frazier (cfm/ft²) to Micrometres per Pascal Second," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/air-permeance/frazier-to-micrometers-per-pascal-second/