Fragrance Oil Percentage Calculator
Enter your wax and fragrance oil weights to check the fragrance load percentage of an existing recipe — or work forward from a target %. Confirm whether your candle's FL% is within the safe range.
Enter the fragrance oil already in your recipe to see the percentage you are running.
Enter to see fragrance cost per candle and batch total.
Results
Check the fragrance percentage of your candle
This calculator leads with the question most makers actually have: what percentage am I running? You already poured a candle — or you are following someone else's recipe — and you want to confirm the fragrance load rather than build a new one from scratch. Enter your wax weight and the fragrance oil weight, and the "Check My FL%" tab returns the exact percentage:
FL% = (FO weight ÷ wax weight) × 100
Example: 0.8 oz fragrance ÷ 8 oz wax × 100 = 10%
There is also a forward tab — Target FL% → FO weight — for when you do want to work the other direction and get the fragrance weight for a target percentage. But the default is the check, because verifying a load is the more common reason people reach for a fragrance-oil-percentage tool.
Reading your result
The calculator does not just return a number — it tells you what the number means for your wax. Every wax has a ceiling on how much fragrance it can hold, so the same 10% that is perfect for soy is well over the limit for beeswax. Your result is flagged as one of three states:
| Status | What it means | What to do |
|---|---|---|
| Within safe range | Your load is comfortably under the wax maximum | Nothing — you are good |
| Approaching maximum | You are in the top 10% of the wax's capacity | Fine, but do not push higher |
| Exceeds maximum | More oil than the wax can bind | Reduce — expect sweating and poor burn |
Is my fragrance load too high?
A load reads as "too high" the moment it passes the maximum for your wax — 10% for most soy, paraffin, and coconut container waxes, and 6% for beeswax. Above the ceiling, the extra oil is not doing what you hoped. It cannot bind into the wax, so it separates and sweats to the surface, saturates the wick, and frequently makes hot throw worse. If the calculator flags your recipe as over the limit, the fix is to reduce fragrance, not to add more wax to "dilute" it — though adding wax does work if you want to keep the same amount of fragrance and bring the percentage down.
Why measure against wax weight
Fragrance percentage is always the ratio of fragrance oil to wax, never to the total poured weight or the jar size. A candle with 8 oz of wax and 0.8 oz of fragrance is 10%, full stop. Calculating against total fill weight instead makes every recipe read lower than it truly is, which is how makers accidentally exceed their wax's limit while thinking they are safe. Measure both wax and fragrance by weight on a scale, and always divide by the wax.
Want to build a recipe from a target instead of checking one? The fragrance load calculator is organized around setting a target and getting the fragrance weight.
Frequently Asked Questions
How do I calculate fragrance oil percentage?
Divide the weight of fragrance oil by the weight of wax and multiply by 100: FL% = (FO ÷ wax) × 100. For example, 0.8 oz of fragrance in 8 oz of wax is 10%. Use wax weight, not total candle weight, and measure both by weight. The "Check My FL%" tab above does this for you.
What percentage is my candle running?
You need two numbers: the wax weight and the fragrance oil weight per candle. Percentage is fragrance divided by wax, times 100. 1 oz of fragrance in 1 pound (16 oz) of wax is 6.25%; 1.28 oz in that pound is 8%. The calculator returns the exact figure and whether it is within your wax's safe range.
Is my fragrance load too high?
Most container waxes cap at 10% and beeswax at 6%. If your percentage is above the maximum for your wax, it is too high — the wax cannot bind the excess, so it sweats, clogs the wick, and can reduce hot throw. The calculator flags your result as within range, approaching maximum, or over the limit.
Is fragrance percentage based on wax weight or total weight?
On wax weight. Fragrance load is the ratio of fragrance oil to wax, not to the finished candle or jar size. A candle with 8 oz of wax and 0.8 oz of fragrance is 10% regardless of the container. Dividing by total fill weight is the most common mistake and makes every recipe read lower than it is.
What fragrance percentage should I be running?
For most soy and coconut container candles, 8–10% is the working range, 10% the max. The classic 1 oz per pound is 6.25% — a fine light start. Beeswax runs 3–6%. Below the range, you have room to increase; above the max, reduce. Always confirm against the IFRA limit on your specific fragrance oil for candles you sell.