Quick answer
Brine concentration = salt ÷ (salt + water) × 100. 60 g of salt in 1,000 g of water gives 5.66%, or 60 g per kg of water.
Enter the weights of salt and water. The calculator returns the brine percentage and salt per kilogram of water.
Related tools: Rice to Water Ratio Calculator: Water needed for rice at the ratio you prefer. Salt Percentage Calculator: Salt as a percentage of the total weight. Butter Conversion Calculator: Convert butter between sticks, tablespoons, cups, grams and ounces.
How to use the Brine Concentration Calculator
- Enter salt (g) (above 0).
- Enter water (g) (above 0).
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Salt | A number, in g | > 0 |
| Water | A number, in g | > 0 |
Formula and method
Formula
brine % = salt ÷ (salt + water) × 100
IEEE-754 double precision; shown to the decimals indicated.
Weight-to-weight concentration.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Salt = 60; Water = 1000.
| Result | Value |
|---|---|
| Brine concentration | 5.66% |
| Salt per kg of water | 60 g |
Example 2
Inputs: Salt = 100; Water = 900.
| Result | Value |
|---|---|
| Brine concentration | 10% |
| Salt per kg of water | 111.11 g |
The first line is the headline result (brine concentration). Below it the brine Concentration Calculator lists salt per kg of water, which describe the same case from other angles. IEEE-754 double precision; shown to the decimals indicated.
Typical brines
Poultry brines are often 5 to 6% by weight; pickles use 3.5 to 5%; sauerkraut about 2 to 2.5% of cabbage weight. A 5.66% brine is close to the 6% brine for turkey.
Use weights
Salt types differ in grain size, so volume measures vary: a tablespoon of fine salt weighs more than a tablespoon of flaky salt. The denominator includes the salt, so the figure is the salt share of the whole solution.
How the result changes with salt
Holding every other input at the first worked example, this table changes only salt. It shows how sensitive the answer is to that one value; each row was produced by running this calculator.
| Salt | Brine concentration | Salt per kg of water |
|---|---|---|
| 30 | 2.913% | 30 g |
| 60 | 5.66% | 60 g |
| 120 | 10.714% | 120 g |
| 240 | 19.355% | 240 g |
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Salt: entering "0" shows "Salt must be greater than 0." beside that field and no result.
- Water: entering "0" shows "Water must be greater than 0." beside that field and no result.
Choosing between the Brine Concentration Calculator and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [Rice to Water Ratio Calculator](/cooking/rice-water-ratio-calculator/) | rice and water per 1 part rice | Water needed |
| [Salt Percentage Calculator](/cooking/salt-percentage-calculator/) | salt and total weight | Salt |
| [Butter Conversion Calculator](/cooking/butter-conversion-calculator/) | i have and amount | Butter |
| [Turkey Thawing Time Calculator](/cooking/turkey-thawing-time-calculator/) | method and turkey weight | Thawing time |
| [Oven Temperature Converter](/cooking/oven-temperature-calculator/) | convert | Temperature |
Background: cooking measurements
For baking, weight is more reliable than volume. A cup holds a fixed volume but its weight depends on the ingredient's density, and a cup of flour can vary by 20 to 30 grams depending on how it is scooped, so published gram-per-cup values for the same ingredient differ from site to site. Spoon and level flour if you must measure by volume.
Check which cup a recipe uses: the US cup is 236.588 mL, while a metric cup is 250 mL.
Assumptions and limitations
- Weights, not volumes
Cooking times are guides. Use a food thermometer to confirm safe internal temperatures.
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for salt and water to confirm this.
Frequently asked questions
How much salt for a 5% brine from 1 L of water?
For 1 kg of water at 5%, salt = 1,000 × 0.05 ÷ 0.95 = 52.6 g, since the percentage is of the total brine weight.
Does the type of salt matter?
By weight no, by volume yes.
What is a 3.5% brine?
A brine with 35 g of salt per kg of solution, like seawater.
What does the Brine Concentration Calculator calculate?
Salt concentration of a brine by weight. It returns Brine concentration and Salt per kg of water.
What formula does the Brine Concentration Calculator use?
brine % = salt ÷ (salt + water) × 100. Weight-to-weight concentration.
What do I need to enter in the brine Concentration Calculator?
You enter Salt (g) and Water (g).
How is the result rounded or limited?
IEEE-754 double precision; shown to the decimals indicated. Weights, not volumes.
What is an example of a brine Concentration result?
With salt 60 and water 1000, the brine concentration is 5.66%.
Can I rely on this calculator for a decision?
Cooking times are guides. Use a food thermometer to confirm safe internal temperatures. For this calculator in particular: Weights, not volumes.
Related calculators
- Rice to Water Ratio Calculator — Water needed for rice at the ratio you prefer.
- Salt Percentage Calculator — Salt as a percentage of the total weight.
- Butter Conversion Calculator — Convert butter between sticks, tablespoons, cups, grams and ounces.
- Oven Temperature Converter — Convert °F, °C and UK gas marks.
- Dough Hydration Calculator — Hydration percentage of a dough.
Sources
- OpenStax, Prealgebra 2e (Rice University): fractions, decimals, percents, ratios and rounding
- NIST Special Publication 811, Guide for the Use of the International System of Units (SI), Appendix B conversion factors (international inch 25.4 mm, avoirdupois pound 0.45359237 kg)
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.