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Volumetric Flux

LMHtom³/m²/h

Convert litres per square metre per hour (LMH) to cubic metres per square metre per hour (m³/m²/h).

Factor1 LMH = 0.001 m³/m²/h

Converter

LMH

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

Result
1m³/m²/h

Rendered to 6 significant figures.

Formula

Formula
m³/m²/h = LMH × 0.001

Multiply any value in litres per square metre per hour by 0.001 to obtain the value in cubic metres per square metre per hour.

Worked example

Convert 1000 LMH to m³/m²/h.

  1. 01Start with 1000 LMH.
  2. 02Multiply by the conversion factor: 1000 × 0.001 = 1 m³/m²/h.
Result1000 LMH = 1 m³/m²/h

Conversion table

LMHm³/m²/h
10.001
20.002
50.005
100.01
200.02
500.05
1000.1
2000.2
5000.5
10001

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from LMH to m³/m²/h?
1 LMH equals 0.001 m³/m²/h. To convert, multiply the value in litres per square metre per hour by 0.001.
How do I convert 1 LMH to m³/m²/h?
1 LMH = 0.001 m³/m²/h. For any value, multiply by 0.001.
How do I convert m³/m²/h back to LMH?
Divide by the same factor — or equivalently, multiply by 1000. So 1 m³/m²/h = 1000 LMH.
When would I need to convert litre per square metre per hour to cubic metre per square metre per hour?
Volumetric-flux conversions between LMH and m³/m²/h 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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