Why you should measure fragrance in GRAMS not MLS

Many candle makers calculate their fragrance oils in volume using milliliters. However, this can create problems, as fragrances have different viscosities (the thickness of the oil). 

If you measure in this way you can end up accidentally adding too much of the thicker fragrance oils or too little of the thinner fragrance oil and you run the risk of miscalculating the amount of fragrance oil you really need to use. 

While this may not make a difference for smaller batches, for larger batches this small difference can really add up. Your candles will be far from perfect and this cost can add up!  In smaller batches, you'll end up with a fragrance that often lacks the desired scent strength. For larger batches, a fragrance overload means some of the fragrance will not bind with the wax, so it sits in its raw form in the body of the candle. 


Fragrance in its raw form, can: 

  • Soak into the candle wick, clogging it (which reduces the capillary action necessary to retain the flame). 
  • Sink to the bottom of the candle, which poses a real fire risk if the fragrance oil comes into contact with the naked flame.
  • Be blocked by the wax molecules, which reduces or blocks scent throw. 

Measuring your fragrance oil in weight (grams) instead of volume (milliliters) is the most accurate way to ensure you are using the right amount of fragrance and avoids so many potential candle making problems.