Reduce to Raise Concentration
Reducing drives off water while the solute stays. The weight you must keep is the solute divided by the target concentration; the rest is what has to evaporate.
Your numbers
Water to boil off
480g
Solution (g)
320g
Solute (g)
48g
Formula
Water to boil off = Solution (g) × (1 − Concentration ÷ Target %)
In sauces and jams sugar and salt concentrate together, so flavour intensifies fast. Reduce to about 80% of target, then taste and adjust.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Solution (g) (g)Solute and solvent together. | 800 | 0 and up |
| Concentration (%)How much of the whole is solute. | 6 | 0.1 ~ 100 |
| Target % (%)The concentration you want; lower means add water, higher means add solute. | 15 | 0.1 ~ 100 |
Step by step
Quick reference table
Results when only Solution (g) (g) changes and everything else stays put.
| Solution (g) (g) | Water to boil off (g) | Solution (g) (g) | Solute (g) (g) |
|---|---|---|---|
| 400 | 240 | 160 | 24 |
| 600 | 360 | 240 | 36 |
| 800 | 480 | 320 | 48 |
| 1,200 | 720 | 480 | 72 |
| 1,600 | 960 | 640 | 96 |
What each result means
| Result | At default values |
|---|---|
| Water to boil off (g)The water that has to boil off to reach the target. | 480 |
| Solution (g) (g)Solute and solvent together. | 320 |
| Solute (g) (g)The stuff being dissolved — sugar, salt and the like. | 48 |
Common mistakes
In sauces and jams sugar and salt concentrate together, so flavour intensifies fast. Reduce to about 80% of target, then taste and adjust.
Glossary
- Solution (g)
- Solute and solvent together.
- Concentration
- How much of the whole is solute.
- Target %
- The concentration you want; lower means add water, higher means add solute.
- Water to boil off
- The water that has to boil off to reach the target.
- Solute (g)
- The stuff being dissolved — sugar, salt and the like.
Frequently asked questions
Q. How is Reduce to Raise Concentration calculated?
Water to boil off = Solution (g) × (1 − Concentration ÷ Target %) — Reducing drives off water while the solute stays. The weight you must keep is the solute divided by the target concentration; the rest is what has to evaporate.
Q. Can you walk through an example?
With Solution (g) 800g, Concentration 6%, Target % 15%, the answer is Water to boil off 480g.
Q. What do I need to enter?
Enter Solution (g), Concentration, Target %. 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 Solution (g) (g) moves the answer to Solution (g) (g) 400 → Water to boil off (g) 240 and Solution (g) (g) 1,600 → Water to boil off (g) 960. 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?
In sauces and jams sugar and salt concentrate together, so flavour intensifies fast. Reduce to about 80% of target, then taste and adjust.
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