How much wax do I need for an 8 oz candle?

An 8 oz jar filled to 90% (the usual headspace) holds about 7.2 fl oz of wax, which at a typical soy density of 0.86 g/mL is about 6.5 oz by weight — about 183 g. Weigh wax, never measure it by volume.

How do I calculate wax weight from container volume?

Multiply the liquid volume by the fill level (about 90%), convert to milliliters (1 fl oz = 29.57 mL), and multiply by wax density — about 0.86 g/mL for soy. That gives grams; divide by 28.35 for ounces by weight. The calculator above does the whole chain.

What fragrance load should I use?

6% is the safe default most wax and fragrance makers publish (6 oz fragrance per 100 oz wax). Soy and paraffin commonly tolerate 6-10%; coconut and parasoy blends can hold more — but never exceed the max load printed on your wax's data sheet, or the oil can weep out of the finished candle.

How many candles does 1 lb of wax make?

About two-and-a-half eight-oz jars, or five four-oz tins. One pound is 454 g of wax, and an 8 oz jar at 90% fill takes about 183 g of that, plus fragrance oil at your load percent.

Candle Wax Calculator

Container count and size in — wax by weight, fragrance oil by load, and per-container pours out. Weigh it; never scoop it.

The short answer

Formula. Wax (oz by weight) = jars × jar fluid ounces × fill % × wax density (soy ≈ 0.86); fragrance oil = wax weight × fragrance load %.

Example. Six 8-oz jars filled to 90% take 38.76 oz (2.42 lb) of soy wax plus 2.33 oz of fragrance oil at a 6% load.

Your candles

Number of containers

Container size (fl oz)

The size it's sold as, e.g. "8 oz jar".

Fill level (%)

90% leaves headspace for a wick and a clean burn.

Wax density (g/mL)

Soy ≈ 0.86, paraffin ≈ 0.9 — check your wax's spec.

Fragrance load (%)

6% is the safe default; obey your wax's max load.

How this calculator works

Candle making is one honest unit conversion, done once and reused forever. A container sold as "8 oz" holds 8 fluid ounces of volume, but wax is bought and weighed by weight — the two meet through density. At the typical soy value of 0.86 g/mL, one fluid ounce (29.57 mL) weighs about 25.4 g, or 0.9 oz by weight; so an 8-oz jar filled to 90% takes roughly 7.2 fl oz ≈ 183 g ≈ 6.5 oz of wax. Multiply by the number of containers and you have your melt-pot target.

Fragrance load is a percentage of the wax weight — 6% means 6 oz of fragrance oil per 100 oz of wax, added when the wax is at the fragrance's flash-point-safe temperature and stirred properly. Two schools split on whether "the batch" is wax-only or wax-plus-fragrance; this calculator uses the common convention (load on wax weight), so a 100 oz wax batch at 6% gets 6 oz of oil for a 106 oz total pour. Never exceed the maximum load your wax's data sheet states — overload oil weeps, sweats and can become a fire risk at the wick.

The details that separate hobby pours from sellable candles live around the arithmetic. Headspace (the reason for 90% fill) prevents soot and tunneled first burns; wax density genuinely differs between soy (≈0.86), paraffin (≈0.9) and coconut blends, and cheap scales that drift 5 g matter more at 100-candle batches; and "one lb fills four 8-oz jars" folk math quietly assumes barely half the jar gets filled — this page's numbers will differ from folk math because the folk math skips the density step. For irregular containers (concrete vessels, teacups), measure water volume to the intended fill line in milliliters, divide by 29.57 to get fl oz, and type that in.

Sources & review date

Soy wax density of about 0.86 g/mL (wax weighs less than water per volume) and a 6–10% fragrance load are typical craft-industry figures — editable inputs.

Last reviewed: October 2026. Numbers that drift (fees, prices, densities) are editable inputs on this page.

Candle wax FAQs

How much wax per 8 oz jar exactly?

About 6.5 oz by weight at 90% fill with soy (density 0.86). If a supplier told you "1 lb per three 8-oz jars," they are using a denser wax or filling higher — trust your scale and your wax's spec sheet over rules of thumb.

Do I include fragrance oil in the wax weight?

The usual convention: fragrance is a percent of the wax weight, added on top. If you prefer "load on total pour," just lower the percentage slightly (6% on total ≈ 6.4% on wax-only) — consistency between batches matters more than the convention.

Why does my candle look smaller than the container's size?

Because the label size is fluid volume, wax is weighed, and you left 10% headspace. A "9 oz" candle in an 8 oz jar usually means the maker filled to the brim and rounded up — compare wax weight, not label folklore.

How do I scale from a test candle to a batch?

Weigh everything in your test pour — wax grams, fragrance grams, container — then multiply by the batch count here and keep dyes and additives in the same per-container ratios. The calculator keeps the pour honest; your notes keep the recipe repeatable.

Assumptions this tool makes: containers are straight-sided so volume scales linearly with fill level; density is the value you enter (soy ≈ 0.86 g/mL, paraffin ≈ 0.9, reviewed October 2026 — use your wax's spec); fragrance load is on wax weight. Estimates are for planning pours — always verify with your wax and fragrance suppliers' data sheets, and follow candle-safety standards if you sell.