How much fragrance oil per pound of wax?

At an 8 percent fragrance load, use 1.28 oz (36 g) of fragrance oil per pound of wax. At 10 percent, use 1.6 oz (45 g). Never exceed your wax's manufacturer maximum (usually 10 to 12 percent) or any individual fragrance's IFRA Category 12 cap, whichever is lower.

How much fragrance oil per pound of soy wax?

Most soy waxes accept 8 to 10 percent fragrance load. At 8 percent that is 36 g per 454 g of soy. At 10 percent it is 45 g. Going above 10 percent on soy usually causes sweating and weaker cold throw, not stronger.

How much fragrance oil for an 8 oz candle?

An 240 ml jar of soy holds about 216 g of total fill. At 8 percent load that is 199 g of wax and 17 g of fragrance oil. At 10 percent it is 195 g of wax and 22 g of fragrance oil. The calculator above does the maths for any vessel and batch size.

How much fragrance oil for a 4 oz candle?

A 4 oz (120 mL) jar of soy holds about 108 g of total fill. At 8 percent load that's 99 g of wax and 9 g of fragrance oil. At 10 percent it's 97 g of wax and 11 g of fragrance oil. Halve the 8 oz numbers and you're within a gram.

How do I calculate fragrance oil for candles?

Fill the empty vessel with water and weigh the water to get total candle weight (1 mL of water is 1 g). Multiply by your fragrance load percentage. Worked example: 216 g of fill at 8 percent gives 17 g of fragrance oil and 199 g of wax. This calculator runs that maths live for any vessel, wax and batch size.

How do I calculate the percentage of fragrance oil for candles?

Fragrance percentage is fragrance grams divided by total candle weight, multiplied by 100. Example: 18 g of fragrance in a 200 g candle is 18 divided by 200 times 100, which is 9 percent. Use total candle weight (wax plus fragrance), not wax weight alone, or your label will overstate the load.

Can you blend more than one fragrance oil in a candle?

Yes. Most chandlers stop at three fragrances per blend. Beyond that the notes muddy and throw weakens. Each fragrance must independently stay under its IFRA Category 12 limit at its share of the total load, which is why the calculator caps the slider against the binding fragrance, not just the wax.

What is the maximum fragrance load for soy wax?

Most soy waxes accept 8 to 10 percent fragrance load. Going above 10 percent causes the oil to seep out (sweating) and weakens cold throw rather than strengthening it.

Why doesn't more fragrance equal stronger throw?

Wax has a finite capacity to bind fragrance molecules. Past that point the oil pools and seeps instead of dispersing into the melt pool, which actually weakens throw.

How does flash point affect pour temperature?

Pour at least 5°C below the lowest flash point in your blend. The calculator's flash strip flags the binding fragrance, suggests a safe pour temperature, and warns when the wax's minimum pour is hotter than the FO can tolerate. In that case, swap to a higher-flash fragrance or a lower-pouring wax.

Free Calculator

Fragrance Oil Calculator

Exact fragrance oil for any vessel, with IFRA caps, flash-point checks, and blends of up to three FOs.

Wax familySpecific wax (optional)

Industry-standard soy container wax. Forgiving, smooth tops with proper heat-gun finish.

Batch input

Wax weight mode will show 200 g from this vessel.

Vessel capacity (filled to the brim)

Wax density used: 0.90 g/mL.Batch size (candles)

Fragrance load (% of wax weight): 8% (max 10%)

Wax-relative, matches supplier TDS. 8% of wax ≈ 7.41% of the finished candle (IFRA basis).

Add this much fragrance oil

16 g

½ oz · 17 mL

Density 0.95 g/mL (industry default)

Wax per candle200 g

FO per candle16 g

Wax for batch200 g

FO for batch16 g

Total pour weight216 g

Build the safety label from this recipe

Single fragrance or blend up to 3

Most chandlers stop at three fragrances. Beyond that the notes muddy and throw weakens. Each fragrance keeps its own IFRA Category 12 cap, and the label below merges allergens and hazard data across the whole mix.

FragranceShare %

Up to 3 total. Shares auto-rebalance.

Additives used

Safety preview

Add a fragrance to populate hazard data.

US (ASTM F2417 + Prop 65 where applicable)

US federal law does not require fragrance allergen disclosure on candles. The allergen list below is shown as good practice. California Prop 65 warnings apply separately. IFRA 51st Amendment (2024-06) + ASTM F2417-26 fire-safety statement.

ClaimsSoy wax · Vegan · Paraffin-free

Universal fire-safety guidance (never leave unattended, trim wick to 5 mm, stop at 10 mm wax, keep from children and pets) belongs on every finished candle label. Label Studio turns this recipe into a print-ready warning label with a scannable QR that resolves to the ingredient and hazard sheet.

Open Label Studio →Free. Auto-fills allergens and hazard icons from this blend, and generates a QR that links to a public ingredient and safety page.

One 240 ml jar of soy at a 10 percent fragrance load, single fragrance oil.

Work out the finished fill
240 ml × 0.9 g/mL = 216 g of finished candle.
Back out the wax
Wax = 216 g ÷ 1.10 = 196 g.
Fragrance is the remainder
216 g minus 196 g = 20 g of fragrance oil.
Check the caps
10 percent must sit at or below both the wax manufacturer maximum and the fragrance's IFRA Category 12 cap. If the oil caps at 8 percent, the calculator drops the dose to 16 g.

Answer

196 g of wax plus 20 g of fragrance oil, provided the IFRA cap allows 10 percent.

Load percentage is fragrance mass as a percentage of wax mass, which is why the wax is divided rather than multiplied.

Choose your wax and vessel, then add one fragrance or blend up to three. Each FO keeps its own IFRA Category 12 (candles) safe-use cap, the binding lowest-flash-point fragrance drives the pour-temperature ceiling, and the safety preview merges allergens and hazard data across the whole mix.

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