What does mg or % nicotine mean

The way an e-liquid company measures their nicotine determines how they display it on their bottles. It used to be that in the UK it was always displayed as mg because of the metric system and outside of the uk it was displayed in %. See the chart below.

  •      0mg = 0mg/mL = 0% Nicotine
  •      1.5mg =1.5mg/ml = 0.15% Nicotine
  •      3mg = 3mg/mL = 0.3% Nicotine
  •      6mg = 6mg/mL = 0.6% Nicotine
  •      12mg = 12mg/mL = 1.2% Nicotine
  •      18mg = 18mg/mL = 1.8% Nicotine
  •      20mg = 20mg/mL = 2.0% Nicotine

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