Enter the bottle size and the concentration; see instantly how many ml and grams each component needs. Add as many components as you like and set the densities yourself. No account required.
Whether the concentration is read in ml or in grams.
Percentages are read in millilitres.
The upper bound is the fragrance oil's IFRA limit.
Base, fixative and extras; one of them fills the remainder.
Each component in ml and grams.
The concentration is taken by volume (v/v): ml = volume × share ⁄ 100. Default densities: fragrance oil 0.95 · base 0.79 · alcohol 0.789 · water 1.0 g/ml.
Your setup is kept in the address bar; whoever opens the link finds the same calculation ready.
This page does one-off maths. Storing the concentration house by house for every perfume, keeping batch notes and seeing the cost per bottle all live in the app.
Open the appSee all featuresThere are two modes, and the same percentage gives a different result in each, because the components have different densities. In volumetric (v/v) mode the percentages are read in millilitres: 25% oil in a 50 ml bottle means 12.5 ml of oil. In gravimetric (w/w) mode the percentages are read in grams; the bottle volume is held constant and the total mass is solved for.
Volumetric: ml = volume × share ⁄ 100 · g = ml × density
Gravimetric: M = volume ⁄ Σ((share ⁄ 100) ⁄ density) · g = M × share ⁄ 100
Professional perfumery works by weight as standard, and IFRA limits are defined by weight too. For home makers working with a syringe, the volumetric calculation stays practical. We covered the difference in a separate article, with numbers.
| Component | Density (g/ml) | Note |
|---|---|---|
| Fragrance oil | 0.95 | Can range from 0.90 to 1.05 depending on the composition |
| Premixed base | 0.79 | Ready base with fixative |
| Alcohol (ethanol) | 0.789 | Perfumer's alcohol |
| Distilled water | 1.00 | Risk of cloudiness above 5% |
| Fixative (DPG) | 1.03 | Improves longevity |
| Hedion | 0.998 | Volume and softness |
| Iso E Super | 0.93 | Woody floor |
If you buy oil by weight but measure it by volume, the conversion is one line: ml = grams ⁄ density. At an average density of 0.95 g/ml, 1 gram of oil is about 1.05 ml and 1 ml is about 0.95 grams; 50 grams of oil is 52.6 ml. With alcohol the gap is larger: 100 grams of alcohol takes up 127 ml. The calculator prints the ml and gram figures side by side for every row, so you never have to do this by hand — the full grams-to-ml table is in a separate article.
Working with a premixed base, two rows are enough: the oil and the base. Building your own base, you can add distilled water, fixative, Hedion or Iso E Super alongside the alcohol and give each its own share. The row marked fill the rest automatically takes whatever percentage is left over — so the total always comes to 100%.
Is the 25% in a perfume formula by volume or by weight? The formula for each method, how much they actually differ, and which one you should be using.
Read the articleFragrance oil has a density of about 0.95 g/ml, so 1 gram is roughly 1.05 ml. The conversion formula, a ready-made table, densities for alcohol and premixed base, and how to measure your own oil's density.
Read the articleWhat you need to make perfume at home, how fragrance oil and alcohol are blended, and how to make your first bottle. A practical walkthrough for hobby perfumers.
Read the article