# Dilution factor

The dilution factor (DF) refers to the ratio of the volume of the initial (concentrated) solution to the volume of the final (dilute) solution, that is V_{1} : V_{2}.

A dilution factor can be calculated by dividing the final volume by the initial volume.

DF = V_{2} / V_{1}

where

- V
_{1}: Initial volume - V
_{2}: Final volume

#### Work example

Your friend diluted 100 mL of concentrated orange juice with 400 mL water. What is the dilution factor?

DF = V_{2} / V_{1}

= (100 mL + 400 mL)/ 100 mL

= 5

That means your friend's diluted orange juice is 5 times less concentrated than the concentrated one.