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Volumetric Flux

gpm/ft²tom³/m²/s

Convert US gallons per minute per square foot (gpm/ft²) to cubic metres per square metre per second (m³/m²/s).

Factor1 gpm/ft² = 0.00067908 m³/m²/s

Converter

gpm/ft²

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

Result
0.067908m³/m²/s

Rendered to 6 significant figures.

Formula

Formula
m³/m²/s = gpm/ft² × 0.00067908

Multiply any value in US gallons per minute per square foot by 0.00067908 to obtain the value in cubic metres per square metre per second.

Worked example

Convert 100 gpm/ft² to m³/m²/s.

  1. 01Start with 100 gpm/ft².
  2. 02Multiply by the conversion factor: 100 × 0.00067908 = 0.067908 m³/m²/s.
Result100 gpm/ft² = 0.067908 m³/m²/s

Conversion table

gpm/ft²m³/m²/s
10.00067908
20.0013582
50.0033954
100.0067908
200.013582
500.033954
1000.067908
2000.13582
5000.33954
10000.67908

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from gpm/ft² to m³/m²/s?
1 gpm/ft² equals 0.00067908 m³/m²/s. To convert, multiply the value in US gallons per minute per square foot by 0.00067908.
How do I convert 1 gpm/ft² to m³/m²/s?
1 gpm/ft² = 0.00067908 m³/m²/s. For any value, multiply by 0.00067908.
How do I convert m³/m²/s back to gpm/ft²?
Divide by the same factor — or equivalently, multiply by 1472.581. So 1 m³/m²/s = 1472.58 gpm/ft².
When would I need to convert US gallon per minute per square foot to cubic metre per square metre per second?
Volumetric-flux conversions between gpm/ft² and m³/m²/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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