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Volumetric Flux

L/m²/daytogpm/ft²

Convert litres per square metre per day (L/m²/day) to US gallons per minute per square foot (gpm/ft²).

Factor1 L/m²/day = 1.704376e-5 gpm/ft²

Converter

L/m²/day

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

Result
1.70438gpm/ft²

Rendered to 6 significant figures.

Formula

Formula
gpm/ft² = L/m²/day × 1.704376e-5

Multiply any value in litres per square metre per day by 1.704376e-5 to obtain the value in US gallons per minute per square foot.

Worked example

Convert 100000 L/m²/day to gpm/ft².

  1. 01Start with 100000 L/m²/day.
  2. 02Multiply by the conversion factor: 100000 × 1.704376e-5 = 1.70438 gpm/ft².
Result100000 L/m²/day = 1.70438 gpm/ft²

Conversion table

L/m²/daygpm/ft²
11.7044e-5
23.4088e-5
58.5219e-5
100.00017044
200.00034088
500.00085219
1000.0017044
2000.0034088
5000.0085219
10000.017044

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from L/m²/day to gpm/ft²?
1 L/m²/day equals 1.704376e-5 gpm/ft². To convert, multiply the value in litres per square metre per day by 1.704376e-5.
How do I convert 1 L/m²/day to gpm/ft²?
1 L/m²/day = 1.70438e-5 gpm/ft². For any value, multiply by 1.704376e-5.
How do I convert gpm/ft² back to L/m²/day?
Divide by the same factor — or equivalently, multiply by 58672.51. So 1 gpm/ft² = 58672.5 L/m²/day.
When would I need to convert litre per square metre per day to US gallon per minute per square foot?
Volumetric-flux conversions between L/m²/day 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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