Candle Wax Calculator
Find out exactly how much wax and fragrance oil you need — per candle or for an entire production batch.
Batch Settings
Internal capacity of your jar or tin
Typical: 6–10% for soy wax
8%
0% — no buffer
20% — large buffer
Results
Wax / candle
0g
Fragrance / candle
0g
Total Wax
0 kg
Total Fragrance
0 ml
Fill / candle
0g
Wax (kg)
0.000 kg
Fragrance (ml)
0 ml
How Much Wax Do You Need Per Candle?
Wax is measured by weight (grams), not by volume (ml). A jar that holds 300ml of liquid doesn't need 300g of wax — the density of soy wax is about 0.86 g/ml, so a 300ml jar needs roughly 258g of total fill.
From that total fill, the fragrance oil takes up a share. At 8% fragrance load: fragrance = 258 × 0.08 = 20.6g. Wax = 258 − 20.6 = 237.4g.
Why Add a Waste Buffer?
Some wax always sticks to the pouring pot and some overflow occurs. A 5–10% buffer ensures you don't run short mid-batch. For large batches, use a smaller buffer; for hand-pouring small runs, 8–10% is safe.