Candle Fragrance Calculator
Calculate exact fragrance oil amounts from wax weight and load percent, with density conversions, batch scaling, and jar-filling planning assistance.
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Helping Notes
Fields match the Craftybase calculator: Quantity, Container Size (oz/lb/g), Fragrance Load %, and Wax Gravity—nothing extra.
Ounces are treated as fluid ounces for input; we convert to weight using wax gravity (default 0.86). Pounds/grams are treated as weight directly.
Fragrance load is percent of wax (not of total). Results are totals for your entire batch in the selected unit.
Results
Wax
Fragrance
Total
What Is a Candle Fragrance Calculator?
A Candle Fragrance Calculator determines precisely how much fragrance oil (FO) to use for any wax batch and intended fragrance load. Because loads are defined as a percentage of wax weight rather than finished blend weight, manual math often causes under‑ or over‑scenting. This tool eliminates guesswork: enter wax mass (or target finished mass), choose a load percentage, and—optionally—supply fragrance density to convert between weight and milliliters. It also handles scaling for multi‑jar pours, reverse calculations (how much wax you need for a known bottle of FO), and mixed unit inputs. Accurate dosing protects wick performance, minimizes sweating or seepage, and helps achieve consistent hot and cold throw from test burn to production. Whether you’re formulating new scents or standardizing recipes across teams, the calculator provides fast, reliable numbers for repeatable results.
About the Candle Fragrance Calculator
The calculator uses straightforward mass relationships and unit conversions. Specify fragrance load as a percentage (for example, 6–10% for many soy blends—always follow your wax supplier’s limits). The engine multiplies wax mass by the selected fraction to get FO mass, then converts to volume using density when needed. If you plan by finished blend (wax + FO) per jar, it solves the inverse: compute wax required so that FO remains the chosen percentage of wax. Geometry is unnecessary here, but capacity planning is easy by multiplying per‑jar targets across quantity. Clear outputs reduce material waste, control cost per candle, and improve scent consistency. Use this tool alongside good manufacturing practices: weigh everything, record batch data, and verify burn tests before scaling a formula to production.
Load fraction: f = %load ÷ 100
FO from wax mass: mFO = mwax × f
Wax from finished target: mwax = mblend/(1+f), mFO = mblend − mwax
FO volume from density: VFO,mL = mFO,g/ρg/mL
Conversions: g = oz × 28.3495 mL = fl‑oz × 29.5735
Actual load check: %load = 100 × mFO/mwax
How to Use This Candle Fragrance Calculator
- Choose your workflow: (a) enter wax mass to get FO mass; or (b) enter finished blend per jar to solve wax and FO.
- Set fragrance load percentage. Stay within your wax manufacturer’s maximum allowable load for best adhesion and throw.
- Optionally enter FO density to see milliliters. If using bottle sizes, this helps plan how many candles one bottle will make.
- For multiple jars, enter quantity; the calculator multiplies totals and provides per‑jar and batch‑level numbers.
- Record results in your recipe card, then weigh precisely. Always test‑burn and adjust wick size before full production.
Examples
- Metric batch: 500 g wax at 8% → mFO = 40 g. If ρ = 0.92 g/mL → ≈ 43.48 mL.
- Two jars, 8 oz finished each, 7%: Total blend = 16 oz → mwax ≈ 14.95 oz; mFO ≈ 1.05 oz.
- Production run: 20 candles × 7 oz finished, 6% → Total blend = 140 oz; mwax ≈ 132.08 oz; mFO ≈ 7.92 oz.
- Reverse planning: 60 mL FO at ρ = 0.95 g/mL → mFO = 57 g; at 9% → mwax ≈ 633.33 g.
Formula Snippets Ready for Rendering
FAQs
Is fragrance load based on wax weight or total blend?
Industry practice uses a percentage of wax weight. The calculator preserves that definition to keep results consistent across batches.
What load percentage should I choose?
Select a value within your wax’s recommended range. Higher isn’t always better; excess FO can cause sweating or poor burn.
Do I measure fragrance by weight or volume?
Weigh for accuracy. If you must measure by volume, use density to convert and then validate by weight whenever possible.
Can I mix units (grams and ounces)?
Yes. Enter any supported units; results normalize internally, and conversions are shown for clarity.
How do I plan per‑jar fills?
Enter finished blend per jar and quantity; the calculator solves wax and FO per jar and scales totals for the batch.
Will a higher load improve hot throw?
Sometimes, but not guaranteed. Wick, vessel, FO chemistry, and cure time matter. Test increments rather than maxing out immediately.
Can I use essential oils instead of fragrance oils?
Some work, many do not. Check safety data, flash points, and performance in your wax system before production.
Do different waxes allow different maximum loads?
Yes. Soy, paraffin, coconut, and blends vary. Always follow your wax supplier’s maximum to avoid adhesion or sweating issues.
What density should I use for FO?
Use the supplier’s specification if available; otherwise assume ~0.90–1.05 g/mL and confirm by weighing 10 mL for accuracy.
How long should candles cure before testing?
Many soy blends benefit from 7–14 days. Follow your system’s guidance and keep notes to refine timelines.
Does temperature affect dosing?
Temperature affects mixing, not the calculated mass. Add FO at the wax’s recommended incorporation temperature for best adhesion.
How do I scale a recipe for a bigger batch?
Multiply all masses by the same factor. The calculator handles scaling automatically when you change jar count or target total.