Melt and Pour Batch Calculator
Melt-and-pour bases usually run a little denser than water, so the default sits at 1.05. Five per cent is added for what stays behind in the jug and the pot.
Your numbers
Soap base needed
662g
Cost per piece
110g
Formula
Soap base needed = Candles × Container volume × Wax density × 1.05
Leftover base can be remelted, so erring high costs nothing. Erring low leaves the last mould half full, which does.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| CandlesHow many you are pouring in one batch of identical vessels. | 6 | 1 and up |
| Container volume (mL)What the vessel holds; filling it with water is the accurate way. | 100 | 1 and up |
| Wax density (g/cm³)Grams per cm³ of wax — soy near 0.9, paraffin a little more. | 1.05 | 0.5 ~ 1.3 |
Step by step
Quick reference table
Results when only Candles changes and everything else stays put.
| Candles | Soap base needed (g) | Cost per piece (g) |
|---|---|---|
| 3 | 331 | 110 |
| 4.5 | 496 | 110 |
| 6 | 662 | 110 |
| 9 | 992 | 110 |
| 12 | 1,323 | 110 |
What each result means
| Result | At default values |
|---|---|
| Soap base needed (g)The base to melt, by weight. | 662 |
| Cost per piece (g)Materials for one piece. | 110 |
Common mistakes
Leftover base can be remelted, so erring high costs nothing. Erring low leaves the last mould half full, which does.
Glossary
- Candles
- How many you are pouring in one batch of identical vessels.
- Container volume
- What the vessel holds; filling it with water is the accurate way.
- Wax density
- Grams per cm³ of wax — soy near 0.9, paraffin a little more.
- Soap base needed
- The base to melt, by weight.
- Cost per piece
- Materials for one piece.
Frequently asked questions
Q. How is Melt and Pour Batch Calculator calculated?
Soap base needed = Candles × Container volume × Wax density × 1.05 — Melt-and-pour bases usually run a little denser than water, so the default sits at 1.05. Five per cent is added for what stays behind in the jug and the pot.
Q. Can you walk through an example?
With Candles 6, Container volume 100mL, Wax density 1.05g/cm³, the answer is Soap base needed 662g.
Q. What do I need to enter?
Enter Candles, Container volume, 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 Candles moves the answer to Candles 3 → Soap base needed (g) 331 and Candles 12 → Soap base needed (g) 1,323. 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?
Leftover base can be remelted, so erring high costs nothing. Erring low leaves the last mould half full, which does.
Related calculators
Materials differ in density and absorption. If your label states a figure, use it — the defaults here are only common values.