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Crafts Calculators

Candle Wax Calculator

Verified formula Updated Jun 2026 Private — runs on your device

Enter details
ml
%
g/ml
Verified formula Private

Wax needed

243.0

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the Candle Wax Calculator

The Candle Wax Calculator works out your wax needed in an instant. Enter container volume, number of containers and fill level and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the container volume.
  2. Enter the number of containers.
  3. Enter the fill level.
  4. Enter the wax density.
  5. Read off your wax needed — the calculator updates automatically, with no button to press.

Formula

The Candle Wax Calculator uses the formula:

Wax needed = Container volume × Number of containers × Fill level ÷ 100 × Wax density

Worked example

For example, with container volume of 300 ml, number of containers of 1, fill level of 9% and wax density of 0.9 g/ml, the wax needed is 243.0.

Inputs used
Container volume 300 ml
Number of containers 1
Fill level 9%
Wax density 0.9 g/ml
Results
Wax needed 243.0

Results are estimates for educational use, not professional advice.

Key terms explained

Density
Mass per unit volume, calculated as mass ÷ volume.
Volume
The amount of three-dimensional space an object occupies, measured in cubic units.

Frequently asked questions

Multiply container volume by fill level and wax density. A 300 ml jar filled to 90% with 0.9 g/ml wax needs about 243 g.

Leaving headroom, often about 10%, prevents overflow and leaves room for the wick and any fragrance oil.

Soy and paraffin waxes are roughly 0.9 g/ml when melted and set. Check your wax for an exact figure.

For precise recipes, yes. Fragrance can be a few percent of weight, so reduce wax slightly if you add a lot.

The Candle Wax Calculator uses the formula: Wax needed = Container volume × Number of containers × Fill level ÷ 100 × Wax density. For example, with container volume of 300 ml, number of containers of 1, fill level of 9% and wax density of 0.9 g/ml, the wax needed is 243.0.

Enter the container volume. Enter the number of containers. Enter the fill level. Enter the wax density. Read off your wax needed — the calculator updates automatically, with no button to press.

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