Make a Saline Solution
Multiply the batch size by the concentration for the solute; the rest is water. 1 kg of 3% saline is 30 g of salt and 970 g of water.
Your numbers
Solute to add
30g
Water to add
970g
Formula
Solute to add = Solution (g) × Target % ÷ 100
That is not the same as adding 30 g of salt to 1 L of water — that gives 1,030 g total and only 2.9%.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Target % (%)The concentration you want; lower means add water, higher means add solute. | 3 | 0 ~ 100 |
| Solution (g) (g)Solute and solvent together. | 1,000 | 0 and up |
Step by step
Quick reference table
Results when only Target % (%) changes and everything else stays put.
| Target % (%) | Solute to add (g) | Water to add (g) |
|---|---|---|
| 1.5 | 15 | 985 |
| 2.25 | 22.5 | 977.5 |
| 3 | 30 | 970 |
| 4.5 | 45 | 955 |
| 6 | 60 | 940 |
What each result means
| Result | At default values |
|---|---|
| Solute to add (g)Extra solute needed to reach the target. | 30 |
| Water to add (g)Extra water needed to reach the target. | 970 |
Common mistakes
That is not the same as adding 30 g of salt to 1 L of water — that gives 1,030 g total and only 2.9%.
Glossary
- Target %
- The concentration you want; lower means add water, higher means add solute.
- Solution (g)
- Solute and solvent together.
- Solute to add
- Extra solute needed to reach the target.
- Water to add
- Extra water needed to reach the target.
Frequently asked questions
Q. How is Make a Saline Solution calculated?
Solute to add = Solution (g) × Target % ÷ 100 — Multiply the batch size by the concentration for the solute; the rest is water. 1 kg of 3% saline is 30 g of salt and 970 g of water.
Q. Can you walk through an example?
With Target % 3%, Solution (g) 1,000g, the answer is Solute to add 30g.
Q. What do I need to enter?
Enter Target %, Solution (g). 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 Target % (%) moves the answer to Target % (%) 1.5 → Solute to add (g) 15 and Target % (%) 6 → Solute to add (g) 60. 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?
That is not the same as adding 30 g of salt to 1 L of water — that gives 1,030 g total and only 2.9%.
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