Convert Gurley Seconds to Bendtsen (mL/min)
Gurley Seconds and Bendtsen millilitres per minute are inversely related: mL/min (Bendtsen) = 11208.53984 ÷ s/100 mL, so 20 s/100 mL = 560.426992 mL/min (Bendtsen).
Also searched as Gurley seconds to mL/min Bendtsen, Gurley seconds in mL/min Bendtsen, Gurley seconds into Bendtsen millilitres per minute, s/100 mL to mL/min Bendtsen, s/100 mL in Bendtsen millilitres per minute, s/100 mL into Bendtsen millilitre per minute, Gurley second to Bendtsen millilitre per minute, s/100 mL to Bendtsen millilitres per minute converter and Gurley seconds to Bendtsen milliliters per minute.
1 s/100 mL = 11208.53984 mL/min (Bendtsen)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk Gurley second to Bendtsen converter to paste a column from Excel.
How to Convert Gurley Second to Bendtsen (mL/min)
- mL/min (Bendtsen) = 11208.53984 ÷ s/100 mL
- s/100 mL = 11208.53984 ÷ mL/min (Bendtsen)
- Example: convert 20 s/100 mL to mL/min (Bendtsen): 11208.53984 ÷ 20 = 560.426992 mL/min (Bendtsen)
Reference conditions. s/100 mL: 100 mL through 6.45 cm² (1 in²) at 1.22 kPa (TAPPI T 460, ISO 5636-5); assumes air flow proportional to pressure difference. mL/min (Bendtsen): 10 cm² test area at 1.47 kPa (ISO 5636-3); assumes flow proportional to pressure difference.
Formula
mL/min (Bendtsen) = 11208.53983988 ÷ s/100 mL
Derivation from SI units:
- Gurley t = seconds for 100 mL of air through 6.45 cm² at 1.22 kPa, so P = 100 mL ÷ (6.45 cm² × 1.22 kPa × t) ≈ 127.08 ÷ t µm/(Pa·s).
- Bendtsen reads mL/min through 10 cm² at 1.47 kPa: 1 mL/min ÷ (10 cm² × 1.47 kPa) = 0.011338 µm/(Pa·s).
- Solving for mL/min (Bendtsen): mL/min (Bendtsen) = 11208.53983988 ÷ s/100 mL (a higher s/100 mL means a lower mL/min (Bendtsen))
One unit is a measured value, so the factor is approximate. Gurley Second definition: Gurley second; Bendtsen (mL/min) definition: Bendtsen millilitre per minute.
Worked examples
- A sack paper of 20 s/100 mL is about 560.426992 mL/min (Bendtsen).
11208.53984 ÷ 20 = 560.426992 mL/min (Bendtsen) - 50 s/100 mL is about 224.1707968 mL/min (Bendtsen).
11208.53984 ÷ 50 = 224.1707968 mL/min (Bendtsen)
Gurley Second to Bendtsen (mL/min) conversion table
| Gurley Seconds (s/100 mL) | Bendtsen (mL/min) (mL/min (Bendtsen)) |
|---|---|
| 1 s/100 mL | 11208.53984 mL/min (Bendtsen) |
| 5 s/100 mL | 2241.707968 mL/min (Bendtsen) |
| 10 s/100 mL | 1120.853984 mL/min (Bendtsen) |
| 20 s/100 mL | 560.426992 mL/min (Bendtsen) |
| 30 s/100 mL | 373.6179947 mL/min (Bendtsen) |
| 50 s/100 mL | 224.1707968 mL/min (Bendtsen) |
| 100 s/100 mL | 112.0853984 mL/min (Bendtsen) |
| 200 s/100 mL | 56.0426992 mL/min (Bendtsen) |
| 500 s/100 mL | 22.41707968 mL/min (Bendtsen) |
| 1000 s/100 mL | 11.20853984 mL/min (Bendtsen) |
Where it's used
Gurley seconds are converted to Bendtsen mL/min for European mills and customers. Bendtsen ≈ 11,208 ÷ Gurley seconds.
Gurley Second to other air permeance units
| Conversion | 1 s/100 mL equals |
|---|---|
| Gurley second to Bendtsen | 11208.53984 mL/min (Bendtsen) |
| Gurley second to micrometre per pascal second | 127.0809506 µm/(Pa·s) |
| Gurley second to Frazier | 3.126991894 cfm/ft² @125 Pa |
| Gurley second to millimetre per second at 100 Pa | 12.70809506 mm/s @100 Pa |
| Gurley second to millimetre per second at 200 Pa | 25.41619011 mm/s @200 Pa |
Frequently asked questions
How do I convert Gurley to Bendtsen?
Bendtsen (mL/min) ≈ 11,208 ÷ Gurley (s/100 mL); 20 s ≈ 560.426992 mL/min (Bendtsen).
What is the formula for Gurley seconds to Bendtsen millilitres per minute?
mL/min (Bendtsen) = 11208.53984 ÷ s/100 mL. The two systems are inversely related, so divide the constant by the value; do not multiply. For example, 11208.53984 ÷ 20 = 560.426992 mL/min (Bendtsen).
Why does a higher s/100 mL give a lower mL/min (Bendtsen)?
Gurley Seconds counts length per unit mass (an indirect system), while Bendtsen millilitres per minute counts mass per unit length (a direct system). A finer yarn has a higher indirect number and a lower direct number.
Is the s/100 mL to mL/min (Bendtsen) conversion exact?
Not exactly. The Gurley second is a measured value (100 mL through 6.45 cm² (1 in²) at 1.22 kPa (TAPPI T 460, ISO 5636-5); assumes air flow proportional to pressure difference.). The Bendtsen millilitre per minute is a measured value (10 cm² test area at 1.47 kPa (ISO 5636-3); 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 5, Gurley method.
- TAPPI T 460 om-21 Air resistance of paper (Gurley method), TAPPI .
- ISO 5636 Paper and board — Determination of air permeance (Part 3: Bendtsen method; Part 5: Gurley method), International Organization for Standardization , Part 3, Bendtsen method.
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 Gurley Seconds to Bendtsen (mL/min). Retrieved October 29, 2026, from https://scientificconverters.com/air-permeance/gurley-seconds-to-bendtsen/
IEEE
Scientific Converters, "Convert Gurley Seconds to Bendtsen (mL/min)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/air-permeance/gurley-seconds-to-bendtsen/