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4 min read / 17 December 2023 / yasmin sharp

Calculating How Much Wax to Use When Making Candles

Discover the art of candle making and master the skill of determining the perfect amount of wax for your projects.

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Perhaps one of the most difficult aspects of candle making is knowing how much wax you need to make a candle.

It’s an important part of the process, because by having the right materials to hand you can save valuable time and money.

We’ve put together a guide on how much wax you need to make a candle, other factors you may need to consider and step-by-step instructions on what calculations you need to use.

How much wax per candle do I need?

Because wax turns to liquid when melted you can use water to calculate the volume of the container that will hold the candle:

  • Using a measuring jug: Fill the container to the level you want the top of the candle to rest at. Then take note of the measurement in millimetres once you have emptied the water into the container.
  • Using weighing scales: Place the empty container onto your measuring scales and set them to ‘zero’. Remove the container and fill with water to the level you’d like the top of the candle to sit at. Return the container to the scales and take note of the measurement. One gram will be equivalent to one millimetre of wax.

Once you have the volume of the container you will then need to multiply it by 0.9.

This is because wax has a lower density (900 kg/m3) and once multiplied the figure will give you the grammage you need for the container.

However, this will not take into account any additional fragrance you may want to add to the container, so be sure to make allowance for this in your final calculations.

Tray of candle making equipment

How to use your own candle wax calculator

Using the information above you can make your own manual candle wax calculator.

For example, if you have a container with a 25cl capacity, the volume would be 250g/ml. Ideally, you want to have a wax level that sits about 1 cm from the top of the container, so you should fill it with 200ml of water. You can then use the following calculation:

200 x 0.9 = 180 grams

The 200 figure represents the amount of water in the container, the 0.9 is used to convert the water density to the wax weight and the final figure is how many grams of wax is needed.

If you have more than one container, you simply multiply the total (180g, for example) by the number of cancel containers. So, if you have 10 candle containers of the same size, the calculation would be:

180 x 10 = 1800 grams

Rows of candles with their wicks being held up on a wooden table

How much wax per candle is needed if you are using fragrances?

As we mentioned above, the initial calculation does not account for any fragrances you may want to add to the container.

This will also require a gram calculation that needs to be added into the final figure. For example, if you wanted to add a 10% fragrance load to a single candle container, the calculation would look like this:

180 x 0.1 = 18 grams (the 0.1 is used to represent the 10% fragrance load).

This would alter the original calculation for the wax, so to get the final number of grams needed for the candle that includes the fragrance, the calculation would be:

180 x 0.1 = 18

You then deduct this from the wax calculation:

180 – 18 = 162.

This means you will need 162 grams of wax for the candle, so you can add 18 grams of fragrance so once the wax sets in the container it will set at the 200ml mark.

How many wax melts will 100g make?

The amount of wax needed to make wax melts depends on their size and how many fragrances you want to add.

Most wax melts are about 10g in weight, so if you are only adding a single fragrance, you could use the following calculation:

100 x 0.1 = 10 grams

This means that, including the fragrance load, the wax volume will be 110g. So, if you are making 10g wax melts, you should be able to make 11 wax melts.

Black and white illustration of a candle

Once you know how much wax you need to make a candle, it becomes a lot easier to plan and finish the job.

Using water to find out the correct volume and weight will help you make the most of your materials, especially if you are adding fragrances to the recipes.

You can also use our guide to figure out how many wax melts you can make, so whether they are for personal use or you make them to be sold, you can plan ahead with confidence.

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Medical Disclaimer

The content in this article is for informational and educational purposes only and is not intended to take the place of medical advice. Please consult your personal physician for any advice or treatment regarding specific health questions. Neither the article editor, writer, nor the organisation of Nikura takes any responsibility for possible health consequences following the information given in any article. All readers should consult their physician before taking any advice given within these articles.

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