Question: how many drops of essential oil per 10ml rollerball?
Answer: handy chart showing HOW MANY DROPS of essential oil to use in a 10ml roller bottle-- 2 drops (1% dilution) for kids; 4 drops (2% dilution) for adults for a blend used most days; 10 drops (5% dilution) for adults for a blend used occasionally: Find this Pin and more on Healthy Living by Cara Morrison.