Essential Oil Dilution Calculator
Mix a scented blend to a precise strength — enter a carrier volume and a target percentage and get the drops (and millilitres) of essential oil to add. For enjoyment and home fragrance, not medical or therapeutic use.
Blend at a strength you can repeat
Getting a home fragrance blend right is a matter of proportion: the essential oil should be a set percentage of the carrier. Fix that ratio and you can scale a favourite reed-diffuser or room blend up or down and get the same scent every time, instead of guessing drop by drop.
Diffusing into water instead of a carrier oil? Use the Diffuser Drops Calculator to match the drops to your tank and room. Prefer flame-free scent? The Wax Melt Quantity Calculator sizes cubes to a room.
Frequently Asked Questions
How many drops are in a millilitre of essential oil?
About 20 drops per millilitre is the standard working figure, so a 2% dilution of a 30 mL carrier is roughly 12 drops. The real number varies with the oil's viscosity and the dropper's orifice — thicker oils give fewer, larger drops — so the calculator lets you change the drops-per-millilitre if you've measured your own dropper.
What dilution should I use?
For scenting purposes it depends on the blend: reed and room diffuser bases are often 1–5%, while a lightly scented carrier oil for the home might sit around 1–2%. This tool is for making a space or blend smell good, not for anything applied to skin — if a product is meant for the body, follow guidance made specifically for that use.
Do I measure by drops or by volume?
Either — the calculator gives you both. Drops are convenient for small home blends straight from the bottle; measuring by volume in millilitres is more precise and repeatable for larger batches. For consistency from one blend to the next, weighing or measuring by volume beats counting drops.
Are these blends safe for skin, children, or pets?
Treat the results as scenting ratios only, not safety guidance. Undiluted and even diluted essential oils can irritate skin and can be harmful to children and pets, and some oils are unsafe around animals altogether. Keep oils and blends out of reach, ventilate the room, and follow the specific safety information for each oil and for anyone or any pet in the home.
For home-fragrance and enjoyment only — not medical or therapeutic advice, and not a guide to skin-safe or ingestible use. Essential oils can be hazardous to children and pets. Follow each oil’s safety information and consult a qualified professional for any health-related use.