How much wax for a 12 oz (360 ml) candle jar?
Short answer
292 g (10.3 oz) of soy wax
For one 12 oz jar — 360 ml brim capacity — poured to 90% full. Denser waxes need more, and the charts below give every combination.
Usually double wicked. Wide enough that a single wick will tunnel in most waxes.
The reason the number surprises people is that two different measurements share a name. A vessel sold as 12 oz holds 12 fluid ounces, which is a volume. Wax is bought and weighed in ounces of mass. Soy sits at about 0.9 g per millilitre, noticeably lighter than water, so a space that would hold 360 g of water holds only about 324 g of wax. Then you leave headspace, and the figure drops again to 292 g.
Every wax type in a 12 oz jar
Density is the only thing that changes between these rows. Same vessel, same 90% fill, different wax.
| Wax | Density | Wax per candle | In ounces |
|---|---|---|---|
| Soy (container blend) | 0.9 g/ml | 292 g | 10.3 oz |
| Coconut soy blend | 0.92 g/ml | 298 g | 10.5 oz |
| Coconut apricot | 0.92 g/ml | 298 g | 10.5 oz |
| Paraffin (container) | 0.9 g/ml | 292 g | 10.3 oz |
| Paraffin (pillar) | 0.9 g/ml | 292 g | 10.3 oz |
| Beeswax | 0.958 g/ml | 310 g | 10.9 oz |
| Rapeseed (canola) blend | 0.92 g/ml | 298 g | 10.5 oz |
| Palm | 0.9 g/ml | 292 g | 10.3 oz |
| Gel wax | 0.95 g/ml | 308 g | 10.9 oz |
The spread between the lightest and densest wax here is about 6%. On a single candle that is nothing. Across a hundred it is a noticeable amount of wax you either did not order or did not use.
How much your fill level changes it
This is the variable most charts hide. A single-figure rule like “multiply by 0.86” has a fill level baked into it that nobody tells you about. Here is what actually happens to a 12 oz jar in soy (container blend) as you pour higher.
| Fill level | Usable volume | Wax per candle | In ounces |
|---|---|---|---|
| 80% | 288 ml | 259 g | 9.1 oz |
| 85% | 306 ml | 275 g | 9.7 oz |
| 90%typical | 324 ml | 292 g | 10.3 oz |
| 95% | 342 ml | 308 g | 10.9 oz |
| 100% | 360 ml | 324 g | 11.4 oz |
Going from 80% to a brim-full pour changes the wax needed by 65 g — more than the difference between any two waxes on this page. If you only get one thing right, get the fill level right.
Fragrance oil for a 12 oz candle
Fragrance is measured as a percentage of wax weight, not of the finished candle. Soy (container blend) holds up to about 10% before it starts to sweat.
| Load | Fragrance oil | In ounces | Finished pour |
|---|---|---|---|
| 6% | 17 g | 0.62 oz | 309 g |
| 8%typical | 23 g | 0.82 oz | 315 g |
| 10% | 29 g | 1 oz | 321 g |
The finished pour column is the wax plus the oil, which is what the filled vessel will actually weigh before you add the jar itself. It is worth noting because the oil takes up space too — at a high load you can slightly overfill a vessel you measured for wax alone.
Batch totals
Wax clings to the melt pot, the jug and the thermometer. The second column is the arithmetic; the third adds 5% so the last jar in the batch is not short. Figures are soy (container blend).
| Candles | Wax needed | Plus 5% wastage | In pounds |
|---|---|---|---|
| 6 | 1.75 kg | 1.84 kg | 4.1 lb |
| 12 | 3.5 kg | 3.67 kg | 8.1 lb |
| 24 | 7 kg | 7.35 kg | 16.2 lb |
| 50 | 14.58 kg | 15.31 kg | 33.8 lb |
How many 12 oz candles from a bag of wax
Rounded down, wastage already deducted — a part-filled jar is not a candle. This is the number to check before you place a wax order.
| Bag size | Weight | 12 oz candles |
|---|---|---|
| 1 kg | 1000 g | 3 |
| 5 lb | 2268 g | 7 |
| 10 lb | 4536 g | 14 |
| 5 kg | 5000 g | 16 |
Change any of it
The calculator below is already set to a 12 oz vessel. Switch the wax, move the fill level, or set a batch size and it recalculates, showing its working each time.
Wax per candle
291.6 g
Wax for 1 candle
291.6 g
Usable volume per vessel
324 ml
90% of 360 ml
Show the calculation
- 1
Usable volume after headspace
360 ml × 90%
= 324 ml
- 2
Wax weight at 0.9 g/ml
324 ml × 0.9 g/ml
= 291.6 g
- 3
Batch total
291.6 g × 1
= 291.6 g
Frequently asked questions
How much wax do I need for a 12 oz candle jar?+
About 292 g (10.3 oz) of soy wax, poured to 90% of the 360 ml brim capacity. Wax is sold by weight and the 12 oz on the vessel is a volume, so the two are never the same number.
How much wax for a 360 ml jar?+
292 g (10.3 oz) of soy wax at a 90% fill. A 360 ml vessel is the same thing as a 12 oz one — suppliers label the same jar either way depending on the market. Multiply the 360 ml by your fill level, then by the wax density, and you have it.
Why doesn't a 12 oz jar take 12 oz of wax?+
Because fluid ounces measure volume and ounces measure weight. Soy wax is about 0.9 g per ml, so the same space holds roughly 10% less wax by weight than it would water. Leave headspace on top of that and you land near 10.3 oz.
How much fragrance oil for a 12 oz candle?+
At 8% of wax weight, 23 g (0.82 oz) of fragrance oil for 292 g (10.3 oz) of wax. That is the percentage most makers run soy at. Measure it against the wax weight, not the finished candle weight — the two give different answers.
How many 12 oz candles will 10 lb of wax make?+
About 14, allowing 5% for wax left in the pot and jug. Without that allowance the arithmetic says slightly more, but the last jar always comes up short.
Does the answer change if I use beeswax?+
Yes. Beeswax is denser than soy at 0.958 g per ml against 0.9, so the same 12 oz vessel needs about 310 g (10.9 oz) — roughly 6% more by weight for exactly the same candle.
What if I fill the jar right to the brim?+
324 g (11.4 oz) of soy. It is not recommended: no headspace means the wick sits at the rim and a lid will touch the wax. 90% is the usual target.
Other sizes
Next to this size: 10 oz and 14 oz.
For an odd vessel with no printed capacity, the full guide covers the water-displacement method. To price what you make, use the cost calculator.