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Volumetric Flux

in/mintogfd

Convert inches per minute (volumetric flux) (in/min) to US gallons per square foot per day (gfd).

Factor1 in/min = 897.6851 gfd

Converter

in/min

Accepts numbers or expressions, e.g. 150 + 14.7

Result
897.685gfd

Rendered to 6 significant figures.

Formula

Formula
gfd = in/min × 897.6851

Multiply any value in inches per minute (volumetric flux) by 897.6851 to obtain the value in US gallons per square foot per day.

Worked example

Convert 1 in/min to gfd.

  1. 01Start with 1 in/min.
  2. 02Multiply by the conversion factor: 1 × 897.6851 = 897.685 gfd.
Result1 in/min = 897.685 gfd

Conversion table

in/mingfd
1897.69
21795.4
54488.4
108976.9
2017954
5044884
10089769
2001.7954e+5
5004.4884e+5
10008.9769e+5

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from in/min to gfd?
1 in/min equals 897.6851 gfd. To convert, multiply the value in inches per minute (volumetric flux) by 897.6851.
How do I convert 1 in/min to gfd?
1 in/min = 897.685 gfd. For any value, multiply by 897.6851.
How do I convert gfd back to in/min?
Divide by the same factor — or equivalently, multiply by 0.001113976. So 1 gfd = 0.00111398 in/min.
When would I need to convert inch per minute (volumetric flux) to US gallon per square foot per day?
Volumetric-flux conversions between in/min and gfd are routine in membrane filtration (RO, UF, MF, NF permeate flux), hydraulic loading specification, water-treatment design, hydrometallurgy and packed-bed column loading, and environmental engineering. LMH (L/m²/h) and gfd (gal/ft²/day) dominate membrane datasheets; m³/m²/h and m³/m²/day cover SI engineering ladders; m/day and cm/s appear as superficial velocity in hydromet and packed-bed work. Volumetric flux is the same physical quantity as superficial velocity (m³/m²/s ≡ m/s) but is kept distinct from the velocity and flow categories because the engineering intent is volumetric throughput per unit area, not bulk motion or total throughput.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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