Two-Part Mix (Resin : Hardener)
Add the ratio numbers to count the parts and divide the batch. A 4:1 litre is five parts — 800 mL resin and 200 mL hardener.
Your numbers
Base (mL)
800mL
Hardener (mL)
200mL
Percentage
20%
Formula
Base (mL) = Volume (mL) × A ÷ (A + B)
Get the ratio wrong and two-part systems either stay tacky or cure weak. Some products state the ratio by weight rather than volume, so check the datasheet.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Volume (mL) (mL)Volume in millilitres. | 1,000 | 0 and up |
| AThe first number of the ratio — the 2 in 2:3. | 4 | 0.1 and up |
| BThe second number of the ratio — the 3 in 2:3. | 1 | 0.1 and up |
Step by step
Quick reference table
Results when only Volume (mL) (mL) changes and everything else stays put.
| Volume (mL) (mL) | Base (mL) (mL) | Hardener (mL) (mL) | Percentage (%) |
|---|---|---|---|
| 500 | 400 | 100 | 20 |
| 750 | 600 | 150 | 20 |
| 1,000 | 800 | 200 | 20 |
| 1,500 | 1,200 | 300 | 20 |
| 2,000 | 1,600 | 400 | 20 |
What each result means
| Result | At default values |
|---|---|
| Base (mL) (mL)The larger of the two parts — the resin or base. | 800 |
| Hardener (mL) (mL)The hardener that makes it set. | 200 |
| Percentage (%)A share expressed out of 100. | 20 |
Common mistakes
Get the ratio wrong and two-part systems either stay tacky or cure weak. Some products state the ratio by weight rather than volume, so check the datasheet.
Glossary
- Volume (mL)
- Volume in millilitres.
- A
- The first number of the ratio — the 2 in 2:3.
- B
- The second number of the ratio — the 3 in 2:3.
- Base (mL)
- The larger of the two parts — the resin or base.
- Hardener (mL)
- The hardener that makes it set.
- Percentage
- A share expressed out of 100.
Frequently asked questions
Q. How is Two-Part Mix (Resin : Hardener) calculated?
Base (mL) = Volume (mL) × A ÷ (A + B) — Add the ratio numbers to count the parts and divide the batch. A 4:1 litre is five parts — 800 mL resin and 200 mL hardener.
Q. Can you walk through an example?
With Volume (mL) 1,000mL, A 4, B 1, the answer is Base (mL) 800mL.
Q. What do I need to enter?
Enter Volume (mL), A, B. 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 Volume (mL) (mL) moves the answer to Volume (mL) (mL) 500 → Base (mL) (mL) 400 and Volume (mL) (mL) 2,000 → Base (mL) (mL) 1,600. 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?
Get the ratio wrong and two-part systems either stay tacky or cure weak. Some products state the ratio by weight rather than volume, so check the datasheet.
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