Candle Wax Calculator
Work out how much wax and fragrance oil your candles need from vessel volume, fill level, wax type and fragrance load, per vessel and for the whole batch. Calculates in your browser.
Total wax needed
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Show the math
Wax is sold by weight, so we turn your vessel volume into a wax weight using the wax's density, allowing for a fill short of the brim:
wax = volume × (fill ÷ 100) × density
fragrance = wax × load ÷ 100
total = (wax + fragrance) × vessels
Densities are typical values, weigh a known volume of your own wax for the best accuracy. Keep fragrance within your wax's rated maximum so it binds properly, and always burn-test a new combination before selling.
What this does
A candle wax calculator works out how much wax and fragrance oil your candles need from vessel volume, fill level, wax type, and fragrance load.
How to use it
- Enter the vessel volume and count.
- Set the fill level.
- Pick the wax type.
- Read the wax and fragrance per batch.
How it works
Wax is sold by weight, so volume is converted using the wax density (the presets are typical values; weigh a known volume of your wax for accuracy). Keep fragrance within your wax’s rated maximum so it binds.
wax = volume × fill ÷ 100 × density
Understanding your result
Wax is sold by weight but vessels are measured by volume, so the density conversion is doing the real work here, and a small overage covers what sticks to the pour pot. Keep fragrance within your wax’s rated load, from the supplier, so it binds rather than pooling, and remember different waxes have different throw and shrinkage, so a second top-up pour is often needed.
Example
A 240 mL jar of soy wax at 90% fill needs about 194 g of wax.
Last updated .
Frequently asked questions
How is the wax amount found?
Wax is sold by weight, so we convert your vessel volume to a wax weight using the wax’s density and your fill level: wax = volume × fill ÷ 100 × density.
How much fragrance oil do I add?
Fragrance is a percentage of wax weight. Use your wax supplier’s rated maximum fragrance load and stay within it so the scent binds instead of seeping out.
Are the wax densities exact?
They’re typical values. For best accuracy, weigh a known volume of your own wax — brands vary — and always burn-test a new recipe.
Do you store anything?
No — every calculation runs locally in your browser.
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