Every perfume starts with one question: how much oil goes in the bottle? Get it wrong and a good oil smells thin, harsh or flat.
Think of the dose as the volume knob, not the song. The fragrance oil decides what your perfume smells like. The dose decides how loud it plays. This guide covers the usual ratios for each perfume strength, how to work out a batch by weight, and how to test before you scale.
The short answer
As general industry practice, finished perfumes carry roughly 20–30% fragrance oil for an extrait, 15–20% for an eau de parfum (some makers go up to 25%), 5–15% for an eau de toilette and 2–5% for an eau de cologne. Body mists sit lower still. The rest is mostly perfumer's alcohol.
These are conventions, not rules. Ranges vary by house, and no law fixes the percentage behind a label. Treat any chart as a starting point, then test the oil you actually plan to use.
Perfume strengths explained
The name on the bottle tells your customer roughly how concentrated the perfume is.
- Extrait de parfum (parfum). The most concentrated strength. It costs the most per bottle to make.
- Eau de parfum (EDP). The workhorse of most modern ranges. A balance of presence and cost.
- Eau de toilette (EDT). Lighter and brighter. A common choice for fresh and citrus directions.
- Eau de cologne (EDC). Light and fleeting.
- Body mist. The lightest format, sprayed generously.
- Perfume oil. Fragrance oil diluted in a carrier oil instead of alcohol, usually sold as a roll-on. Doses vary widely, so test carefully.
Fragrance oil to alcohol ratio chart
The ranges below are widely published industry conventions, not Aroma Labs specifications. They are typical starting points only.
| Strength | General industry range (oil %) | Oil in a 100 g batch | Perfumer's alcohol in a 100 g batch |
|---|---|---|---|
| Extrait de parfum | 20–30% | 20–30 g | 70–80 g |
| Eau de parfum | 15–20% (some makers up to 25%) | 15–25 g | 75–85 g |
| Eau de toilette | 5–15% | 5–15 g | 85–95 g |
| Eau de cologne | 2–5% | 2–5 g | 95–98 g |
| Body mist | roughly 1–3% (some sources up to 8%) | about 1–8 g | the rest, often with some water |
A quick way to read ratios: 20% oil is the same as 1 part oil to 4 parts alcohol. 25% is 1 to 3. 15% is roughly 1 to 5.7.
Every oil behaves differently, so treat the chart as a starting point. Check each product page or contact us for the recommended dose for that oil.
Worked examples, by weight
Weigh everything in grams on a digital scale that reads to at least 0.1 g, or better 0.01 g for small batches. Percentages here mean percent by weight.
A 10 g test batch at 20%
- Fragrance oil: 10 g × 0.20 = 2 g
- Perfumer's alcohol: 10 g − 2 g = 8 g
A 10 ml sample of a fragrance oil covers several small test batches at EDP strength.
A 100 g batch of eau de parfum at 18%
- Fragrance oil: 100 g × 0.18 = 18 g
- Perfumer's alcohol: 100 g − 18 g = 82 g
How many bottles will 1 kg of oil make?
Fill one of your bottles with a finished blend and weigh the liquid. That number is your fill weight. Multiply it by your oil percentage to get the oil per bottle, then divide 1,000 g by that figure.
For example, if your 50 ml bottle holds about 41 g of blend at 18%, each bottle uses about 7.4 g of oil. One kilo of oil then fills roughly 135 bottles, before losses from testing, filtering and spills. Your own numbers will differ with your bottle, your oil and your dose, so always run the sum on a real filled bottle.
Why weigh instead of measuring by volume
Fragrance oils and alcohol have different densities. Perfumer's alcohol is noticeably lighter than water, and fragrance oils vary from oil to oil. A 20% blend measured in millilitres won't be the same as a 20% blend measured in grams.
Weighing also makes batches repeatable. 18 g of oil and 82 g of alcohol comes out the same, whoever mixes it.
What changes the right dose
Two oils at the same percentage can perform very differently.
- The character of the oil. Heavy base notes like amber, woods, musk and oud often read strong at a modest dose. Bright citrus and fresh accords can feel weak at the same percentage because their top notes lift off fast. See how top, middle and base notes work.
- Your alcohol. Use proper perfumer's alcohol. Other alcohols can add a harsh opening that no dose will fix.
- Your format and price point. A higher dose raises your cost per bottle. Match the strength to what your customer is paying for.
- Your market. Different markets have their own rules on fragrance products. Check what applies where you sell, and ask us about the specific oil you plan to use. Check each product page or contact us for the recommended dose for that oil.
More oil isn't always better. Past a point, a blend can turn cloudy, sticky or sharp on skin. That's a sign to step back, not push further.
Let the blend rest before you judge it
A freshly mixed perfume rarely smells finished. The alcohol and oil need time to settle together. Perfumers call this maceration. It is standard practice to rest an alcohol-based blend for a few weeks in a cool, dark place, in a sealed bottle, before final evaluation.
Resting times vary from oil to oil, so check each product page or contact us for guidance on the oil you are using. Smell the blend on day one and again at the end. The change is often striking.
Test your blend before you scale
Evaluate before you scale. A simple testing path saves expensive mistakes.
- Strip. Smell the oil on a paper strip to check the direction.
- Side-by-side doses. Mix two or three small batches, for example 15%, 18% and 22% for an EDP, and label them clearly.
- Rest. Let every batch macerate for the same time.
- Skin. Patch-test a diluted blend on a small area of skin and check it over the day.
- Small run. Make a short run in your final bottle and live with it for a while before a full production order.
Want to compare several oils this way? Build a Tester Box of 10 oils, 10 ml each, and run the same test on each.
Signature or Essential: which grade for which strength?
Our oils come in two grades. Same scent character, different job.
- Signature is our fine-fragrance grade. Use it for extraits, eaux de parfum and any product where the scent is the product.
- Essential is our production grade, built for cost per kilo and batch-to-batch consistency. Use it for body mists and lighter, volume-led ranges.
The right dose depends on the oil as well as the grade. Check each product page or contact us for the recommended dose for that oil.
Not sure which fits your range? Compare them on our Pricing page, or test both in the same base and let your nose decide.
Where to go next
- Building a range from scratch? Read our step-by-step guide to starting a fragrance business.
- Ready to mix? Follow how to make perfume with fragrance oil.
Frequently asked questions
How much fragrance oil do I add to perfumer's alcohol?
It depends on the strength. As general industry practice, an eau de parfum typically uses roughly 15–20% fragrance oil by weight, sometimes up to 25%, with perfumer's alcohol making up the rest. An extrait goes higher, an eau de toilette lower.
How much fragrance oil for a 10 ml perfume?
At 20%, a 10 ml perfume needs about 2 ml of fragrance oil and 8 ml of perfumer's alcohol. Because oil and alcohol have different densities, weighing is more accurate. Fill one bottle, weigh the liquid, and take 20% of that weight as oil.
How much fragrance oil is in an eau de parfum?
Most eaux de parfum sit around 15–20% fragrance oil as general industry practice, and some makers go up to 25%. Check each product page or contact us for the recommended dose for that oil.
What is the ratio of oil to alcohol in perfume?
A common starting point is 1 part oil to 4 parts alcohol, which is 20%. For a stronger extrait, many makers move towards 1 to 3 (25%). For a lighter eau de toilette, 1 to 9 (10%) is a typical place to start.
Can fragrance oil be used as perfume without alcohol?
Yes, as a perfume oil. Fragrance oil can be diluted in a suitable carrier oil and sold as a roll-on. Don't apply a concentrate undiluted to skin. Dilute it, patch-test, and check each product page or contact us to find out whether the oil you've chosen suits a carrier-oil format, and at what dose.
What are the perfume concentration levels?
From strongest to lightest: extrait de parfum, eau de parfum, eau de toilette, eau de cologne and body mist. Each step down uses less oil and more alcohol.
How long should perfume macerate?
General practice is to rest an alcohol-based blend for a few weeks in a cool, dark place before final evaluation. Resting times vary by oil, so check each product page or contact us for guidance on the oil you are using.
Test your ratio with the oil you'll actually use
A chart gets you close. Your own test batch gets you there. Start with a USD 12, 10 ml sample of the fragrance oil you plan to launch with, or compare several at once with a Tester Box. Planning a full range? Start with our fragrance business guide.
