For beginning candle makers, the idea of adding fragrance seems like a simple one. It's easy to assume there will be a certain number of drops they have to add or that maybe they're supposed to add whatever smells good. But experienced candle makers know the process isn't that simple. The proper amount of fragrance oils for candles relies on calculations based on the type and amount of wax being used, and the fragrance oils themselves can affect the final appearance of the candle.