How much wax for an 8 oz (240 ml) candle jar?
Short answer
194 g (6.9 oz) of soy wax
For one 8 oz jar — 240 ml brim capacity — poured to 90% full. Denser waxes need more, and the charts below give every combination.
The most common single-wick container size there is, and the one most recipes online are written around.
The reason the number surprises people is that two different measurements share a name. A vessel sold as 8 oz holds 8 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 240 g of water holds only about 216 g of wax. Then you leave headspace, and the figure drops again to 194 g.
Every wax type in an 8 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 | 194 g | 6.9 oz |
| Coconut soy blend | 0.92 g/ml | 199 g | 7 oz |
| Coconut apricot | 0.92 g/ml | 199 g | 7 oz |
| Paraffin (container) | 0.9 g/ml | 194 g | 6.9 oz |
| Paraffin (pillar) | 0.9 g/ml | 194 g | 6.9 oz |
| Beeswax | 0.958 g/ml | 207 g | 7.3 oz |
| Rapeseed (canola) blend | 0.92 g/ml | 199 g | 7 oz |
| Palm | 0.9 g/ml | 194 g | 6.9 oz |
| Gel wax | 0.95 g/ml | 205 g | 7.2 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 an 8 oz jar in soy (container blend) as you pour higher.
| Fill level | Usable volume | Wax per candle | In ounces |
|---|---|---|---|
| 80% | 192 ml | 173 g | 6.1 oz |
| 85% | 204 ml | 184 g | 6.5 oz |
| 90%typical | 216 ml | 194 g | 6.9 oz |
| 95% | 228 ml | 205 g | 7.2 oz |
| 100% | 240 ml | 216 g | 7.6 oz |
Going from 80% to a brim-full pour changes the wax needed by 43 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 an 8 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% | 12 g | 0.41 oz | 206 g |
| 8%typical | 16 g | 0.55 oz | 210 g |
| 10% | 19 g | 0.69 oz | 214 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 | 1.17 kg | 1.22 kg | 2.7 lb |
| 12 | 2.33 kg | 2.45 kg | 5.4 lb |
| 24 | 4.67 kg | 4.9 kg | 10.8 lb |
| 50 | 9.72 kg | 10.21 kg | 22.5 lb |
How many 8 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 | 8 oz candles |
|---|---|---|
| 1 kg | 1000 g | 4 |
| 5 lb | 2268 g | 11 |
| 10 lb | 4536 g | 22 |
| 5 kg | 5000 g | 24 |
Change any of it
The calculator below is already set to a 8 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
194.4 g
Wax for 1 candle
194.4 g
Usable volume per vessel
216 ml
90% of 240 ml
Show the calculation
- 1
Usable volume after headspace
240 ml × 90%
= 216 ml
- 2
Wax weight at 0.9 g/ml
216 ml × 0.9 g/ml
= 194.4 g
- 3
Batch total
194.4 g × 1
= 194.4 g
Frequently asked questions
How much wax do I need for an 8 oz candle jar?+
About 194 g (6.9 oz) of soy wax, poured to 90% of the 240 ml brim capacity. Wax is sold by weight and the 8 oz on the vessel is a volume, so the two are never the same number.
How much wax for a 240 ml jar?+
194 g (6.9 oz) of soy wax at a 90% fill. A 240 ml vessel is the same thing as an 8 oz one — suppliers label the same jar either way depending on the market. Multiply the 240 ml by your fill level, then by the wax density, and you have it.
Why doesn't an 8 oz jar take 8 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 6.9 oz.
How much fragrance oil for an 8 oz candle?+
At 8% of wax weight, 16 g (0.55 oz) of fragrance oil for 194 g (6.9 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 8 oz candles will 10 lb of wax make?+
About 22, 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 8 oz vessel needs about 207 g (7.3 oz) — roughly 6% more by weight for exactly the same candle.
What if I fill the jar right to the brim?+
216 g (7.6 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: 6 oz and 9 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.