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Volumetric Flux

m/daytogfd

Convert metres per day (volumetric flux) (m/day) to US gallons per square foot per day (gfd).

Factor1 m/day = 24.54301 gfd

Converter

m/day

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

Result
24.543gfd

Rendered to 6 significant figures.

Formula

Formula
gfd = m/day × 24.54301

Multiply any value in metres per day (volumetric flux) by 24.54301 to obtain the value in US gallons per square foot per day.

Worked example

Convert 1 m/day to gfd.

  1. 01Start with 1 m/day.
  2. 02Multiply by the conversion factor: 1 × 24.54301 = 24.543 gfd.
Result1 m/day = 24.543 gfd

Conversion table

m/daygfd
124.543
249.086
5122.72
10245.43
20490.86
501227.2
1002454.3
2004908.6
50012272
100024543

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from m/day to gfd?
1 m/day equals 24.54301 gfd. To convert, multiply the value in metres per day (volumetric flux) by 24.54301.
How do I convert 1 m/day to gfd?
1 m/day = 24.543 gfd. For any value, multiply by 24.54301.
How do I convert gfd back to m/day?
Divide by the same factor — or equivalently, multiply by 0.0407448. So 1 gfd = 0.0407448 m/day.
When would I need to convert metre per day (volumetric flux) to US gallon per square foot per day?
Volumetric-flux conversions between m/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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