1I know my wax weight
Use the wax already on your scale, then calculate the fragrance oil to add.
Candle Fragrance Load Calculator
Free candle-making tool
Calculate how much fragrance oil to add to your candle wax
Start with the number you already have: your wax weight, a finished batch target, or a mold you measured with water. Enter the fragrance percentage from your product guide or tested recipe, and the calculator shows exactly how much wax and fragrance oil to weigh.
2I know my finished batch weight
Start with the total wax + fragrance amount you want and split it correctly.
3I measured my mold with water
Use a water measurement as a planning estimate when the mold capacity is not already known.
The calculator works out the recipe; it does not choose a safe fragrance percentage for you. Use the current guidance for your exact wax and fragrance, keep wax limits and fragrance/IFRA limits on the basis they are published on, and test the finished candle.
Enter what you know and get the exact weights to mix
Choose the starting measurement you already have, enter the fragrance percentage from your product guide or tested recipe, and see the wax, fragrance oil and finished batch weights instantly.
Weight-based recipeWax % and finished-batch % kept separateOptional product-limit checks
Fragrance recipe
What to weigh
Answer in
Enter a weight and fragrance percentage to see your live recipe.
Fragrance oil to weigh—use a scale, not mL
Wax to weigh—recipe wax amount
Finished batch—wax + fragrance
Helpful recipe equivalents
Fragrance as % of wax—
Fragrance as % of finished batch—
Fragrance per 1 lb wax—
Finished batch composition—
Optional product checks not added
Your recipe has been calculated. Add limits for your exact wax or fragrance only if you want the calculator to compare them.
Wax max · % of waxNot added
Fragrance / IFRA max · % of finished batchNot added
Show calculation
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How candle fragrance load math works
The calculation is straightforward once you know what the percentage is based on. These examples show the three calculator methods and why wax limits and fragrance/IFRA limits must be checked separately.
First, check what the percentage means
An “8% fragrance load” can produce different recipes depending on what the 8% is measured against.
% of wax weightFragrance = Wax × Load
Finished batch = Wax + Fragrance
Finished batch = Wax + Fragrance
% of finished productFragrance = Finished batch × Percentage
Wax = Finished batch − Fragrance
Wax = Finished batch − Fragrance
Many candle-wax product guides state fragrance load as a percentage of wax weight, so the calculator uses that as the default. If your source clearly says the percentage is based on the finished wax + fragrance product, choose that option instead.
Why the two percentages look different: 8 g fragrance added to 100 g wax is 8% of the wax, but only 8 ÷ 108 × 100 = about 7.41% of the finished 108 g formula.
Starting with a known wax weight
Use this method when the wax on your scale is the amount you intend to melt.
Worked example: 500 g wax at 8% of wax weight
Wax500 g
Fragrance load8% of wax
Fragrance oil40 g
Finished batch540 g
40 ÷ 540 × 100 ≈ 7.41% of the finished product. The same 8% wax-based recipe is 1.28 oz fragrance per 1 lb wax.
If the same “8%” is instead defined as 8% of the finished product, 500 g of starting wax needs about 43.48 g fragrance and produces about 543.48 g finished formula. The percentage basis changes the answer.
Starting with a finished batch weight
Use this when the combined wax + fragrance amount must finish at a specific total weight.
Wax-based loadWax = Target ÷ (1 + Load)
Fragrance = Target − Wax
Fragrance = Target − Wax
Finished-product basisFragrance = Target × Percentage
Wax = Target − Fragrance
Wax = Target − Fragrance
Worked example: 500 g finished target at 8% of wax
Finished target500 g
Wax462.96 g
Fragrance oil37.04 g
Check462.96 + 37.04 = 500 g
37.04 ÷ 462.96 = 8% of wax. The fragrance share of the finished formula is about 7.41%.
Starting with a mold-water measurement
Use this as a capacity planning estimate when you do not already know the candle's finished fill weight.
The calculator first estimates a finished scented formula weight from the measured water weight. It does this with an adjustable water conversion factor (sometimes called a water-to-formula factor). The default 0.86 is only a planning starting point—not a universal wax density or guaranteed mold conversion.
Worked example: 100 g water × 0.86 conversion factor at 8% of wax
Water measurement100 g
Estimated finished formula86 g
Wax79.63 g
Fragrance oil6.37 g
The 86 g total is an estimate. A tested factor for your exact mold/formula gives a stronger starting point.
For irregular molds or a dedicated capacity workflow, use the Water-to-Wax Volume Converter. This calculator keeps the water method because it is useful when the only measurement you have is mold water weight.
Check the wax limit and fragrance limit separately
They can be published on different percentage bases, so one “maximum %” box would be misleading.
Wax product maximumCompare Fragrance ÷ Wax × 100 with the maximum published for your exact wax.
Fragrance / IFRA limitCompare Fragrance ÷ Finished product × 100 with the current limit supplied for the exact fragrance and candle use.
IFRA quantitative restrictions are expressed as concentration in the finished consumer product. Candles are listed under IFRA Category 12 in the current guidance. The calculator can compare a limit you enter, but it does not decide compliance for you.
No universal “safe maximum” is hard-coded for soy, paraffin, coconut, beeswax or another broad wax family. Exact products differ. Use the current documentation for the exact wax and fragrance you are using.
Weigh the fragrance oil and test the finished candle
Accurate arithmetic makes the recipe repeatable, but it does not replace product guidance or candle testing.
Measure fragrance oil by weight. Do not treat mL and grams as interchangeable unless you know the exact oil density and intentionally convert it. After making the recipe, follow the processing guidance for the exact materials and test the complete candle—including wick behavior, appearance and burn performance.
| Wax weight | 6% of wax | 8% of wax | 10% of wax |
|---|---|---|---|
| 100 g | 6 g | 8 g | 10 g |
| 500 g | 30 g | 40 g | 50 g |
| 1 kg | 60 g | 80 g | 100 g |
| 1 lb wax | 0.96 oz | 1.28 oz | 1.60 oz |
If you are blending several fragrance oils, calculate the total fragrance amount here first, then divide that amount with the Fragrance Oil Blending Calculator. When the full candle formula is known, use the Candle Wick Size Estimator for starting wick candidates and confirm them with burn testing.
Candle fragrance load FAQs
Simple answers to the percentage, weighing, product-limit and mold-water questions that most often cause fragrance recipe mistakes.
Is fragrance load based on wax weight or finished candle weight?
It depends on the source you are following. Many candle-wax product guides state fragrance load as a percentage of wax weight. An 8% wax-based load means 8 g fragrance for every 100 g wax. Other limits or specifications can be stated as a percentage of the finished product. Choose the calculator basis that matches the exact wording of your source.
What does 8% fragrance load mean?
On the usual wax-weight basis, 8% means 8 parts fragrance for every 100 parts wax by weight. For example, 500 g wax uses 40 g fragrance and makes a 540 g finished scented batch.
Why does 8% of wax become about 7.4% of the finished batch?
Because the finished batch includes both wax and fragrance. With 100 g wax + 8 g fragrance, the total is 108 g. Fragrance is therefore 8 ÷ 108 × 100 = 7.4074% of the finished formula. The calculator shows both versions so you can compare limits on the correct basis.
How much fragrance oil do I use for 1 lb of wax?
On a wax-weight basis, 6% = 0.96 oz, 8% = 1.28 oz, and 10% = 1.60 oz fragrance per 1 lb (16 oz) wax. These are math examples, not recommended fragrance loads for every wax.
What fragrance load should I use for soy wax?
There is no single percentage that is correct for every soy wax. Use the current fragrance guidance for the exact wax product you own, then check any applicable limit for the exact fragrance oil. The calculator should scale a percentage you already have—it should not invent one.
Why are there two different maximum-fragrance fields?
Because they answer different questions. A wax product's maximum fragrance load is commonly stated as % of wax weight. A fragrance/IFRA quantitative limit is expressed for the finished consumer product. Keeping the two fields separate prevents a misleading one-number “maximum” check.
Does an IFRA limit tell me how much fragrance my wax can hold?
No. A fragrance restriction and a wax capacity limit are different constraints. Your recipe needs to respect the applicable information for both exact products. The calculator can compare both when you enter them, but one does not replace the other.
What is the maximum fragrance load for soy, paraffin, coconut or beeswax?
There is no reliable universal maximum for a whole wax family. Commercial waxes and blends have different formulations and published limits. Check the technical information for the exact wax you are using.
Will a higher fragrance load always give a stronger hot throw?
No. Fragrance percentage alone cannot predict hot throw. Wax formulation, fragrance chemistry, wick, candle diameter, processing, cure conditions and burn testing all matter. More fragrance is not automatically better.
Should I measure fragrance oil in grams or mL?
For this recipe calculator, use a weight measurement on a scale—grams, weight ounces or pounds. Fragrance oils can have different densities, so mL and grams are not automatically interchangeable.
Can I enter ounces and show the answer in grams?
Yes. Input and answer units are independent. The calculator keeps the same physical amount internally, so switching between grams, ounces and pounds does not turn the rounded display number into a new quantity.
How does the mold-water method work?
Weigh the water that fills the mold to your intended pour line. The calculator multiplies that water weight by the selected water conversion factor to estimate the finished scented formula weight, then splits that estimate into wax and fragrance. The default 0.86 factor is a planning starting point, not a universal wax density.
Should I use the water method for an irregular silicone mold?
You can use the water shortcut here when that is the measurement you have. For a dedicated capacity-planning workflow, use the Water-to-Wax Volume Converter first, then bring the planned candle weight back to this fragrance calculator.
Can this calculator prove my candle is safe or IFRA compliant?
No. It performs recipe arithmetic and compares limits that you enter. Use current documentation for the exact wax, fragrance and intended candle application, follow the material instructions, and complete appropriate finished-candle testing.
How do I divide the fragrance amount between several fragrance oils?
Calculate the total fragrance amount here first. Then use the Fragrance Oil Blending Calculator to divide that total between the oils in your blend. This keeps “how much fragrance?” separate from “how should I split the fragrance blend?”
Turn the fragrance recipe into a tested candle
Use the next calculator for wax planning, mold capacity, fragrance blending, wick starting points, processing temperature or burn-test data.