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Volumetric Flux

L/m²/daytogfd

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

Factor1 L/m²/day = 0.02454301 gfd

Converter

L/m²/day

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

Result
2.4543gfd

Rendered to 6 significant figures.

Formula

Formula
gfd = L/m²/day × 0.02454301

Multiply any value in litres per square metre per day by 0.02454301 to obtain the value in US gallons per square foot per day.

Worked example

Convert 100 L/m²/day to gfd.

  1. 01Start with 100 L/m²/day.
  2. 02Multiply by the conversion factor: 100 × 0.02454301 = 2.4543 gfd.
Result100 L/m²/day = 2.4543 gfd

Conversion table

L/m²/daygfd
10.024543
20.049086
50.12272
100.24543
200.49086
501.2272
1002.4543
2004.9086
50012.272
100024.543

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from L/m²/day to gfd?
1 L/m²/day equals 0.02454301 gfd. To convert, multiply the value in litres per square metre per day by 0.02454301.
How do I convert 1 L/m²/day to gfd?
1 L/m²/day = 0.024543 gfd. For any value, multiply by 0.02454301.
How do I convert gfd back to L/m²/day?
Divide by the same factor — or equivalently, multiply by 40.7448. So 1 gfd = 40.7448 L/m²/day.
When would I need to convert litre per square metre per day to US gallon per square foot per day?
Volumetric-flux conversions between L/m²/day 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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