Enter the total lumens and the volume in litres into the calculator to determine the lumens per litre. This calculator helps in evaluating the light intensity per unit volume.

Lumens Per Litre Formula

The following formula is used to calculate the lumens per litre.

LL = L / V

Variables:

  • LL is the lumens per litre (lm/L)
  • L is the total lumens (lm)
  • V is the volume in litres (L)

To calculate the lumens per litre, divide the total lumens by the volume in litres.

What is Lumens Per Litre?

Lumens per litre is a measure of light intensity per unit volume. It is used to quantify the amount of visible light present in a given space and is particularly useful in the fields of lighting design and horticulture. This measurement can help determine the efficiency and effectiveness of lighting systems in illuminating spaces or growing plants.

How to Calculate Lumens Per Litre?

The following steps outline how to calculate the Lumens Per Litre.


  1. First, determine the total lumens (L) provided by the light source.
  2. Next, determine the volume of the space (V) in litres.
  3. Use the formula from above = LL = L / V.
  4. Finally, calculate the Lumens Per Litre (LL).
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Total lumens (L) = 800 lm

Volume of the space (V) = 10 L