How to calculate how much wax to use
You’ve got your mould or your container and you’re ready to make some candles but how much wax do you need?
It’s dead easy to work out.
- Fill the container or mould with water (if it’s a mould, cover the hold with your finger) to the proper level
- Tip the water into a measuring jug, round up to the nearest 10ml or so
- Deduct 10%
- That’s the number of grammes of wax to use
For example if your container takes 250ml of water, you would use 225g of wax (250-25).
This is because 1ml of water weighs exactly 1 gramme (for the nerds amongst you this is because a Kilogram is defined as the weight of 1 litre of water). So 250ml of water weighs 250g. However, wax is slightly less dense than water so you need to deduct 10% or so to get the right weight in wax.

