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Candle Wax Calculator

Estimate the wax and fragrance for container candles from the weight of water that fills the jar. Runs locally in your browser.

for the water weight
grams (g)
weigh the jar empty, fill to the pour line with water, weigh again and subtract
sets a typical density
grams per millilitre
use the figure on your wax data sheet if you have one
% of wax weight
most container waxes take 6–10%
jars in the batch
Enter the water weight to calculate.

Wax weight = water weight × wax density, because 1 g of water is about 1 ml. Fragrance is a percentage of the wax weight and is added on top. These are estimates: densities vary by supplier, wax shrinks as it sets, and the first burn test shows whether the jar needs topping up.