Volume of wax (ml) = Jar Volume × Fill % × Wax Density (g/ml). Fragrance oil is calculated as a percentage of the total wax weight. For example, a 200ml jar at 85% fill with soy wax (0.90 g/ml) gives 153ml volume → 137.7g wax. At 10% fragrance load, you need 13.77g fragrance oil and 123.9g wax.
Formula: Wax (g) = Jar Volume (ml) × Fill % × Wax Density. For example, a 200ml jar at 85% fill with soy wax (density 0.90 g/ml) needs 153ml volume → about 137.7g of wax. Always weigh, never eyeball.
Standard fragrance load is 6–10% of total wax weight. For 500g soy wax at 10%, add 50g fragrance oil. Beeswax can only bind 3–6% before it sweats or becomes a fire hazard. Always check the flash point of your fragrance oil.
With 1kg of soy wax: roughly 7 candles in 200ml jars (~137g wax each), 5 candles in 300ml jars (~191g each), or 10 candles in 150ml tins (~102g each). Use the calculator above for your exact jar and batch size.
Soy wax burns cleaner, longer, and is natural — great for eco-friendly candles. Holds 6–12% fragrance. Paraffin is cheaper with a stronger scent throw and holds up to 12% fragrance. Coconut-soy blends give the best of both. Beeswax is the most natural but expensive with very low fragrance capacity.
Add fragrance oil to soy wax at 60–65°C (140–150°F) — hot enough to bind but not so hot the fragrance burns off. Stir slowly for 2 minutes. For paraffin, add at 65–75°C. Always check your specific fragrance oil's flash point before working with it.