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Candle Wax Calculator

A candle wax calculator converts container water volume in ounces to wax mass using a fill factor (0.86 for soy), then applies fragrance load as a percent of wax. Four 8 oz soy tins at 8% fragrance need about 27.5 oz of wax and 2.2 oz of oil, plus 10% extra wax for the melting pot.

Quick Summary & Direct Answer
Making

How much soy wax is in an 8 oz candle?

An 8 oz container holds 8 oz of water. Soy wax at 0.86 of that mass is 6.88 oz (195 g). At an 8% fragrance load the oil is 0.55 oz (16 g). Buy a little extra for the pour pot.

Key Takeaways

  • Container ounces are water volume, not wax mass.
  • Fragrance percent is of wax weight, a common candle-making convention.
  • UK and Australian makers can read grams on the same card.
  • Flashpoint and IFRA limits are not computed here.

Wax to melt

30.3 oz

Wax (no extra)27.52 oz / 780 g
Fragrance2.2 oz / 62 g
Wax with 10% extra858 g

Results can be wrong. This calculator is unofficial. Figures can be incomplete, rounded, or not updated. Use them at your own risk and check a tape, datasheet, ball band, or official chart before cutting, mixing, buying, or publishing. Jar ounces are water volume. Soy/paraffin factors are typical fill ratios, not a specific wax batch. Fragrance percent is of wax mass. Limits of liability are in the terms of service.

Frequently asked questions

No. 8 oz is usually the water volume of the jar. Soy wax is lighter, so the wax mass is lower.

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Publisher notes · reviewed 29 October 2026

Jar ounces are water volume, not wax mass

Soy fill 0.86 converts 8 oz of water volume to 6.88 oz of wax. Fragrance load is a percent of that wax. Ten percent extra wax fills the pouring pitcher. IFRA maxima are not computed.

Load percent

6–10% is a common soy range. The oil supplier’s IFRA document is the cap.

Worked examples

  • Four 8 oz soy tins at 8%

    27.5 oz wax before extra; 2.2 oz fragrance.

Limits of this page

  • Wick size is not calculated.
  • Container fill lines below the shoulder reduce volume.

Sources