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Volumetric Flux

m³/m²/htogpm/ft²

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

Factor1 m³/m²/h = 0.4090502 gpm/ft²

Converter

m³/m²/h

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

Result
0.40905gpm/ft²

Rendered to 6 significant figures.

Formula

Formula
gpm/ft² = m³/m²/h × 0.4090502

Multiply any value in cubic metres per square metre per hour by 0.4090502 to obtain the value in US gallons per minute per square foot.

Worked example

Convert 1 m³/m²/h to gpm/ft².

  1. 01Start with 1 m³/m²/h.
  2. 02Multiply by the conversion factor: 1 × 0.4090502 = 0.40905 gpm/ft².
Result1 m³/m²/h = 0.40905 gpm/ft²

Conversion table

m³/m²/hgpm/ft²
10.40905
20.8181
52.0453
104.0905
208.181
5020.453
10040.905
20081.81
500204.53
1000409.05

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from m³/m²/h to gpm/ft²?
1 m³/m²/h equals 0.4090502 gpm/ft². To convert, multiply the value in cubic metres per square metre per hour by 0.4090502.
How do I convert 1 m³/m²/h to gpm/ft²?
1 m³/m²/h = 0.40905 gpm/ft². For any value, multiply by 0.4090502.
How do I convert gpm/ft² back to m³/m²/h?
Divide by the same factor — or equivalently, multiply by 2.444688. So 1 gpm/ft² = 2.44469 m³/m²/h.
When would I need to convert cubic metre per square metre per hour to US gallon per minute per square foot?
Volumetric-flux conversions between m³/m²/h and gpm/ft² 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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