Candle Wax Calculator
Calculate the exact amount of wax and fragrance oil needed for your candle container, based on volume, wax density, and fragrance load.
Fill in the required fields to see your result.
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Wax is lighter than water, so a container's volume (in ml) isn't the same as its weight in wax — this calculator handles that density conversion for you.
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How to Measure Your Candle Container
Fill your container with water up to your intended pour line, then weigh it (subtracting the container's own weight) — water weight in grams equals volume in milliliters. This gives you an accurate volume even for oddly shaped containers.
How to Calculate Wax and Fragrance Amounts
Total fill weight = Container Volume × Wax Density. Fragrance weight = Total Fill Weight × Fragrance Load %. Wax needed = Total Fill Weight − Fragrance Weight.
Candle Wax Calculator Formula
- Total Fill Weight = Container Volume (ml) × Wax Density (g/ml)
- Fragrance Weight = Total Fill Weight × (Fragrance Load % ÷ 100)
- Wax Weight = Total Fill Weight − Fragrance Weight
How Much Wax Do I Need for My Candle?
Depends on your container's volume and your wax's density — wax is lighter than water, so volume and weight aren't the same number. This calculator converts between them using your wax's specific density.
Candle Wax Measurement Examples
Soy wax candle: 400 ml container, 0.9 density, 8% fragrance load. Total = 360g. Fragrance = 28.8g. Wax = 331.2g.
Paraffin wax candle: 250 ml container, 0.86 density, 7% fragrance load. Total = 215g. Fragrance ≈ 15.1g. Wax ≈ 199.9g.
Common Wax Densities
Soy wax is typically about 0.9 g/ml, beeswax about 0.96 g/ml, and paraffin varies by blend — always check your specific wax's density from the manufacturer for the most accurate result.
Common Candle Wax Measurement Mistakes
Filling to the container's full capacity instead of your intended pour line — leave headspace (typically 0.5-1 inch) for the wick and safety. Exceeding your wax's recommended maximum fragrance load, which can cause oil to "sweat" out onto the candle's surface. Using a generic density figure instead of your specific wax's actual density, which can meaningfully shift the calculated weight.
How to Use This Calculator
Enter your container's volume (fill it with water and weigh it if you don't know the volume), your wax's density, and your desired fragrance load percentage.
Formula & Methodology
Total Fill Weight = Container Volume × Wax Density. Fragrance Weight = Total Fill Weight × Fragrance Load %. Wax Needed = Total Fill Weight − Fragrance Weight.
Example: 400ml container, soy wax (0.9 density), 8% fragrance load
Total fill weight = 400 × 0.9 = 360g. Fragrance = 360 × 8% = 28.8g. Wax needed = 360 − 28.8 = 331.2g.
Wax density varies by type: soy is typically about 0.9 g/ml, beeswax about 0.96 g/ml, and paraffin varies by blend — use your specific wax's density for the most accurate result. This calculates fill weight only; leave headspace (typically 0.5-1 inch) below the rim for the wick and safety, and measure your container's volume up to your intended fill line, not to the very top.
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Frequently Asked Questions
- How do I find my container's volume if I don't know it?
- Fill the container with water up to your intended pour line, then weigh it (subtracting the empty container's weight). Water weight in grams equals volume in milliliters.
- What wax density should I use?
- Soy wax is typically about 0.9 g/ml, beeswax about 0.96 g/ml. If you know your specific wax's density from the manufacturer, use that for the most accurate result.
- What fragrance load should I use?
- 6-10% is typical for most container candles. Check your specific wax and fragrance oil's recommended maximum load — exceeding it can cause "sweating" (oil pooling on the surface) or a weak, inconsistent burn.
- Why isn't wax weight the same as container volume?
- Wax is lighter than water — most candle wax has a specific gravity below 1.0, meaning a given volume of wax weighs less than the same volume of water. This calculator converts volume to the correct wax weight using your wax's density.
- Should I fill the container all the way to the top?
- No — leave headspace (typically 0.5-1 inch) below the rim for the wick and to prevent the flame from being too close to the container's edge. Measure volume up to your intended fill line, not the container's full capacity.
Last updated 7/12/2026