Sports Drink Mix Calculator
Calculate prepared sports-drink carbohydrate concentration, sodium per litre and per-serving amounts from the final mixed volume.
Drink concentration workspace
Final prepared volume; no isotonicity claim
Your prepared drink profile
6 % w/v carbohydrate
Final prepared volume: 750 mL
Full result table
| Serving mL | Carbohydrate g | Sodium mg |
|---|---|---|
| 100 | 6 | 60 |
| 250 | 15 | 150 |
| 750 | 45 | 450 |
Uses final prepared volume, not water added before powder. Carbohydrate concentration alone does not establish osmolality, isotonicity or tolerance. Sodium is not salt mass. The worksheet does not prescribe an individual drinking plan.
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How to use Sports Drink Mix Calculator
- Use the volume after the drink is completely prepared.
- The beaker view expresses carbohydrate grams per 100 mL, while sodium is shown in mg/L.
- A carbohydrate percentage does not identify the number of dissolved particles or the mix’s measured osmolality.
Worked example
45 g carbohydrate and 450 mg sodium in a final 750 mL drink give 6% w/v carbohydrate and 600 mg/L sodium. A 250 mL serving supplies 15 g carbohydrate and 150 mg sodium.
Formula, accuracy & limitations
Carbohydrate % w/v = grams carbohydrate / final mL × 100. Sodium mg/L = total sodium mg / final mL × 1000. A serving contains each total × serving mL / final mL.
Uses final prepared volume, not water added before powder. Carbohydrate concentration alone does not establish osmolality, isotonicity or tolerance. Sodium is not salt mass. The worksheet does not prescribe an individual drinking plan.
These outputs use the stated model and your supplied inputs. A mathematically consistent model can still differ from personal measurements. Scenario curves and formula comparisons are not statistical confidence intervals.
Source and method context ↗Measure the final mixture
Use the volume after the drink is completely prepared. Powder can affect the final volume, so the amount of water poured into a bottle is not always the same quantity. Add all carbohydrate and sodium sources to the batch totals before calculating concentration.
Read concentration and serving mass separately
The beaker view expresses carbohydrate grams per 100 mL, while sodium is shown in mg/L. The serving table scales both totals to a selected drink volume. These use different units and are not stacked together on a shared numerical axis.
Avoid claiming isotonicity from one percentage
A carbohydrate percentage does not identify the number of dissolved particles or the mix’s measured osmolality. Ingredient types, taste and gastrointestinal tolerance also matter. The page reports the supplied mixture mathematically rather than declaring it suitable for every athlete or condition.
Audit a dilution without adding nutrients
If a prepared drink containing 45 g carbohydrate and 450 mg sodium is diluted from 750 to 1,000 mL, total nutrient masses stay the same. Carbohydrate concentration falls from 6% to 4.5% w/v, and sodium concentration falls from 600 to 450 mg/L. A 250 mL serving then supplies 11.25 g carbohydrate and 112.5 mg sodium. This is a concentration change, not nutrient destruction. The input asks for the final drink volume precisely so that this distinction remains visible.
Frequently asked questions
Should I enter sodium or salt?
The field asks for sodium in milligrams. A label showing salt grams needs an appropriate conversion before those values can be used here.
Does 6% prove a drink is isotonic?
Carbohydrate mass concentration does not by itself measure osmolality. The calculator makes no isotonic or absorption claim.
Can I choose a serving larger than the batch?
The interface rejects a serving larger than the final batch to keep a practical serving interpretation.
Are fluid needs calculated?
No personal fluid requirement is inferred. This tool describes the drink that you entered.
