Candle Wax Calculator

This calculator converts a candle container's volume into the weight of wax needed to fill it, accounting for how full you actually want to pour it and which wax you're using. Fill Volume is Container Volume times Fill Percentage -- pouring to 100% is unrealistic in practice, so most candle makers target 85-90% to leave room for the wick and avoid overflow during a hot pour. Wax Weight then applies a density factor specific to the wax type: soy (0.86), paraffin (0.90), beeswax (0.96), and coconut (0.92) are commonly cited approximate specific gravities relative to water, though exact density varies by specific blend and manufacturer.

Container Volume and Fill Percentage are mathematically tied in their effect on Wax Weight -- since Wax Weight is a straight product of the two, both move the result by the same magnitude, in the same direction, while switching Wax Type shifts the same fill volume up or down by roughly 10-12% depending which of the four waxes you select, since denser waxes weigh more for the same poured volume. Candles per 10 lb Slab is a rough yield estimate assuming zero waste, which real pours rarely achieve. This calculator does not add extra wax for fragrance oil or dye load -- fragrance is typically 6-10% of wax weight and should be calculated on top of the figures shown here.