How to Calculate Candle Fragrance Load Without Guessing
Fragrance load is one of the first numbers candle makers need to understand. It controls how much fragrance oil goes into the wax, but it also affects burn behavior, scent throw, cure time, and whether the wax can actually hold the oil you are adding.
The cleanest way to calculate fragrance load is to base it on the weight of the wax, not the final combined pour weight. That keeps the math simple and helps you compare batches consistently.
Fragrance oil weight = wax weight × fragrance load percentage
For example, if you are using 16 ounces of wax at a 10% fragrance load, the fragrance oil amount is 1.6 ounces. Your finished batch will weigh about 17.6 ounces before pouring.
What Fragrance Percentage Should You Use?
Most container waxes perform somewhere in the 6% to 10% range, but every wax and fragrance oil behaves differently. Always check your wax supplier's recommended fragrance range and the IFRA documentation for the specific fragrance oil before selling a finished candle.
Why Weight Matters More Than Volume
Use a digital scale and measure by weight. Fragrance oils vary in density, so a tablespoon or fluid ounce of one oil will not always weigh the same as another. Weight-based formulas make your batches easier to repeat and easier to scale.
Frequently Asked Questions
- Can I use more fragrance oil for stronger scent throw? Sometimes, but more oil is not always the fix. Too much fragrance can lead to sweating, poor burn behavior, wick issues, or a candle that never performs cleanly.
- Is the IFRA limit the same as the recommended fragrance load? No. The IFRA limit is a safety maximum for that fragrance category. Your wax may need a lower percentage to burn well.
