Enter how much fragrance oil you have, the concentration and the bottle size. You get the number of full bottles, the total mixture and what is left over. No account needed.
Weighed it on a scale? Pick grams, and it is converted at 0.95 g/ml.
Bottle count rounds down: a leftover too small to fill a bottle is not counted. The base figure is a volumetric calculation.
100 grams of fragrance oil is about 105.3 ml (at a density of 0.95 g/ml). Used at 25% concentration that gives you 421 ml of mixture: eight full 50 ml bottles with 21 ml left over. Drop the concentration and the count goes up: the same 100 grams gives 10 bottles at 20% and 14 bottles at 15%.
Three lines. Convert the oil to a volume, run the concentration backwards, then divide by the bottle:
oil_ml = grams ⁄ density (skip this step if you measured in ml)
total_ml = oil_ml × 100 ⁄ concentration
bottles = floor(total_ml ⁄ bottle_ml) · left over = total_ml − bottles × bottle_ml
With the amount of oil fixed, concentration is the only variable. Lowering it by a few points visibly raises the bottle count, but it also weakens the scent, so this is as much a formulation decision as a cost one:
| Concentration | Total mixture (ml) | 50 ml bottles | Left over (ml) |
|---|---|---|---|
| 15% | 701.75 | 14 bottles | 1.75 |
| 18% | 584.8 | 11 bottles | 34.8 |
| 20% | 526.32 | 10 bottles | 26.32 |
| 22% | 478.47 | 9 bottles | 28.47 |
| 25% | 421.05 | 8 bottles | 21.05 |
| 30% | 350.88 | 7 bottles | 0.88 |
This is one of the most common mistakes. 100 grams of fragrance oil is not 100 ml. At an average density of 0.95 g/ml, 100 grams is about 105.3 ml. So someone measuring on a scale has roughly 5% more volume than someone measuring with a syringe, and may get one extra bottle out of it. If your supplier sells oil by weight, run the calculation in grams. More detail: the grams to ml conversion table.
The other side of the reverse calculation: once you know what a single bottle takes, you can estimate the yield in your head. For a 50 ml bottle:
| Concentration | Oil (ml) | Oil (g) | Base (ml) | Base (g) |
|---|---|---|---|---|
| 15% | 7.5 | 7.13 | 42.5 | 33.58 |
| 18% | 9 | 8.55 | 41 | 32.39 |
| 20% | 10 | 9.5 | 40 | 31.6 |
| 22% | 11 | 10.45 | 39 | 30.81 |
| 25% | 12.5 | 11.88 | 37.5 | 29.63 |
| 30% | 15 | 14.25 | 35 | 27.65 |
For the full set of bottle sizes and concentrations see how much fragrance oil a 50ml perfume needs; for how to choose the concentration in the first place, read what percentage of fragrance oil to use.
This page tells you how many bottles you get. For the ml and gram figure of every component, use the concentration calculator.
Perfume calculatorSee all featuresFragrance 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 articleA 50ml perfume at 25% needs 12.5ml (11.88g) of fragrance oil. Concentration tables for 30, 50 and 100ml bottles, the formula behind them, and why the gram figure never matches the millilitre one.
Read the articleThe cost of a homemade perfume bottle is materials plus packaging. The unit-price formula, a worked 50ml example, the line items people forget, and how to get to a profit margin.
Read the article