Candle Wax Calculator
Fill the vessel with water and weigh it: that gives the volume in millilitres. Wax is lighter than water, so the same volume takes less weight — soy sits around 0.9 g/cm³.
Your numbers
Wax needed
162g
Container volume
180mL
Formula
Wax needed = Container volume × Fill level ÷ 100 × Wax density
Do not fill to the brim. Leaving the top tenth clear gives room for the wick and the throw, and soy often sinks as it sets, so a second top-up pour is normal.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Container volume (mL)What the vessel holds; filling it with water is the accurate way. | 200 | 1 and up |
| Fill level (%)How far up you fill; the top stays clear. | 90 | 10 ~ 100 |
| Wax density (g/cm³)Grams per cm³ of wax — soy near 0.9, paraffin a little more. | 0.9 | 0.5 ~ 1.2 |
Step by step
Quick reference table
Results when only Container volume (mL) changes and everything else stays put.
| Container volume (mL) | Wax needed (g) | Container volume (mL) |
|---|---|---|
| 100 | 81 | 90 |
| 150 | 122 | 135 |
| 200 | 162 | 180 |
| 300 | 243 | 270 |
| 400 | 324 | 360 |
What each result means
| Result | At default values |
|---|---|
| Wax needed (g)The wax to melt, by weight. | 162 |
| Container volume (mL)What the vessel holds; filling it with water is the accurate way. | 180 |
Common mistakes
Do not fill to the brim. Leaving the top tenth clear gives room for the wick and the throw, and soy often sinks as it sets, so a second top-up pour is normal.
Glossary
- Container volume
- What the vessel holds; filling it with water is the accurate way.
- Fill level
- How far up you fill; the top stays clear.
- Wax density
- Grams per cm³ of wax — soy near 0.9, paraffin a little more.
- Wax needed
- The wax to melt, by weight.
Frequently asked questions
Q. How is Candle Wax Calculator calculated?
Wax needed = Container volume × Fill level ÷ 100 × Wax density — Fill the vessel with water and weigh it: that gives the volume in millilitres. Wax is lighter than water, so the same volume takes less weight — soy sits around 0.9 g/cm³.
Q. Can you walk through an example?
With Container volume 200mL, Fill level 90%, Wax density 0.9g/cm³, the answer is Wax needed 162g.
Q. What do I need to enter?
Enter Container volume, Fill level, Wax density. The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Container volume (mL) moves the answer to Container volume (mL) 100 → Wax needed (g) 81 and Container volume (mL) 400 → Wax needed (g) 324. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
Do not fill to the brim. Leaving the top tenth clear gives room for the wick and the throw, and soy often sinks as it sets, so a second top-up pour is normal.
Related calculators
Materials differ in density and absorption. If your label states a figure, use it — the defaults here are only common values.