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Volumetric Flux

gpm/ft²tocm/s

Convert US gallons per minute per square foot (gpm/ft²) to centimetres per second (volumetric flux) (cm/s).

Factor1 gpm/ft² = 0.067908 cm/s

Converter

gpm/ft²

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

Result
1.00028cm/s

Rendered to 6 significant figures.

Formula

Formula
cm/s = gpm/ft² × 0.067908

Multiply any value in US gallons per minute per square foot by 0.067908 to obtain the value in centimetres per second (volumetric flux).

Worked example

Convert 14.73 gpm/ft² to cm/s.

  1. 01Start with 14.73 gpm/ft².
  2. 02Multiply by the conversion factor: 14.73 × 0.067908 = 1.00028 cm/s.
Result14.73 gpm/ft² = 1.00028 cm/s

Conversion table

gpm/ft²cm/s
10.067908
20.13582
50.33954
100.67908
201.3582
503.3954
1006.7908
20013.582
50033.954
100067.908

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gpm/ft² to cm/s?
1 gpm/ft² equals 0.067908 cm/s. To convert, multiply the value in US gallons per minute per square foot by 0.067908.
How do I convert 1 gpm/ft² to cm/s?
1 gpm/ft² = 0.067908 cm/s. For any value, multiply by 0.067908.
How do I convert cm/s back to gpm/ft²?
Divide by the same factor — or equivalently, multiply by 14.72581. So 1 cm/s = 14.7258 gpm/ft².
When would I need to convert US gallon per minute per square foot to centimetre per second (volumetric flux)?
Volumetric-flux conversions between gpm/ft² and cm/s 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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