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Volumetric Flux

m/daytoLMH

Convert metres per day (volumetric flux) (m/day) to litres per square metre per hour (LMH).

Factor1 m/day = 41.66667 LMH

Converter

m/day

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

Result
41.6667LMH

Rendered to 6 significant figures.

Formula

Formula
LMH = m/day × 41.66667

Multiply any value in metres per day (volumetric flux) by 41.66667 to obtain the value in litres per square metre per hour.

Worked example

Convert 1 m/day to LMH.

  1. 01Start with 1 m/day.
  2. 02Multiply by the conversion factor: 1 × 41.66667 = 41.6667 LMH.
Result1 m/day = 41.6667 LMH

Conversion table

m/dayLMH
141.667
283.333
5208.33
10416.67
20833.33
502083.3
1004166.7
2008333.3
50020833
100041667

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from m/day to LMH?
1 m/day equals 41.66667 LMH. To convert, multiply the value in metres per day (volumetric flux) by 41.66667.
How do I convert 1 m/day to LMH?
1 m/day = 41.6667 LMH. For any value, multiply by 41.66667.
How do I convert LMH back to m/day?
Divide by the same factor — or equivalently, multiply by 0.024. So 1 LMH = 0.024 m/day.
When would I need to convert metre per day (volumetric flux) to litre per square metre per hour?
Volumetric-flux conversions between m/day and LMH 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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