I just love making blends and potions, but I can never remember the amount of essential oils to bases in different recipes that I'm trying to make.
For most lotions, creams, polishes etc an EO blend of 1%-2% is usually advisable. When making room sprays or perfumes, you would most likely use between 5% and 10% depending on the strength desired. It's always best to start with less and add more.
When blending carriers or bases with an essential oil or oil blend, here is a handy chart to keep on hand: