HydrationGuideA homemade electrolyte drink is three pantry ingredients and thirty seconds of stirring. This is a calculator, not a recipe blog post: pick a mix style, set your bottle size, and get exact kitchen measures with the resulting sodium and potassium per litre shown honestly, recalculated from the rounded amounts.
How this calculator works
Each mix style is a target profile per litre. Sports drink aims near commercial sports drinks and the ACSM's guidance for exercise over an hour: roughly 500 mg sodium per litre with 6% carbohydrate. Zero sugar reproduces the LMNT-style ratio (1,000 mg sodium, 200 mg potassium, optional 60 mg magnesium) for heavy sweat or fasted training. Rehydration sits in WHO oral-rehydration territory, saltier and lightly sweet, because glucose actively helps the gut absorb sodium and water.
The engine then works backwards to kitchen measures. Lite Salt (half sodium chloride, half potassium chloride) is sized to hit the potassium target; table salt tops up the remaining sodium; sugar converts at 12.5 g per tablespoon. Everything rounds to eighth-teaspoons and half-tablespoons because nobody measures 0.183 teaspoons, and the per-litre numbers shown are computed from the rounded amounts.
Estimates for healthy adults, not medical advice. Potassium salt substitutes can be dangerous with kidney disease and some blood-pressure medications; the rehydration mix is not a substitute for medical ORS in serious illness. Ask your doctor.
The three mixes at a glance (per litre)
Computed by the same engine as the calculator, for a one-litre batch. The sodium and potassium figures come from the rounded kitchen measures — they're what actually ends up in the bottle.
| Mix | Best for | Table salt | Lite Salt | Sugar | Sodium | Potassium | Carbs |
|---|---|---|---|---|---|---|---|
| Sports drink | Exercise over an hour | ⅛ tsp | ⅛ tsp | 5 tbsp | 433 mg | 175 mg | 6.3% |
| Zero sugar | Heavy sweat, fasted training | ⅜ tsp | ⅛ tsp | — | 1008 mg | 175 mg | 0% |
| Rehydration | Illness, big fluid losses | ⅜ tsp | ¼ tsp | 2 tbsp | 1153 mg | 350 mg | 2.5% |
For scale: commercial sports drinks sit near 460 mg sodium and 6% carbs per litre, and an LMNT packet mixed to a litre gives about 1,000 mg sodium. The zero-sugar mix adds an optional 60 mg magnesium via citrate or malate powder.
Which mix, when?
| Situation | Reach for | Why |
|---|---|---|
| Run, ride, or match over an hour | Sports drink | Sodium for sweat plus 6% carbs for fuel and faster fluid absorption |
| Heavy sweating on a fasted or low-carb day | Zero sugar | Full sodium replacement without breaking the fast or the carb budget |
| Stomach bug, food poisoning, rough morning after | Rehydration | Saltier and lightly sweet on purpose — glucose actively helps the gut absorb sodium and water |
| Desk day, normal meals, light sweat | Plain water | Food already covers your electrolytes — a mix just adds sodium you don't need |
Electrolyte myths vs. the label math
| Myth | Reality |
|---|---|
| Everyone should sip electrolytes all day | Typical diets already run high in sodium. Electrolyte drinks earn their place when you actually sweat — match the mix to the loss. |
| Pink or sea salt adds meaningful minerals | The trace minerals are present in nutritionally trivial amounts. What matters in the mix is the sodium, and that's the same in any salt. |
| Coconut water is nature's sports drink | It's decent potassium but very low sodium — the reverse of what sweat takes out. Fine as a drink, wrong as a sweat replacement. |
| Branded mixes work better than homemade | Your body can't tell branded sodium from kitchen sodium — the ions are identical. You pay for flavour, convenience, and consistency. |
| Sugar in a sports drink is always bad | During long exercise and in rehydration, glucose speeds sodium and water absorption — it's load-bearing, not filler. For everyday sipping, skip it. |
Why make your own?
Price, mostly. The ingredients in a litre of any of these mixes cost a few cents; the equivalent branded packet or bottle runs one to two dollars. Electrolytes are commodity ions, and your body cannot tell premium sodium from the shaker kind. The other reason is control: commercial options force a bundled choice of sugar level, flavor, and salt strength, while a homemade mix lets you set each to match the actual job, whether that is a long run in July or sipping through a desk day after a sweaty morning workout.
The honest trade-off: branded mixes taste engineered, travel well, and never need a measuring spoon. If that convenience is what gets electrolytes into you on a hard day, it is worth the dollar.
Frequently asked questions
What is the best homemade electrolyte drink recipe?
For a litre of sports-drink strength: about 1/8 teaspoon of table salt, 1/8 teaspoon of Lite Salt (a 50/50 salt substitute), 4-5 tablespoons of sugar, and a squeeze of citrus. That lands near commercial sports drinks: roughly 450-500 mg sodium, 175 mg potassium, and 6% carbohydrate. Scale it to any bottle with this calculator, or switch presets for a zero-sugar or rehydration mix.
What can I use instead of Lite Salt for potassium?
Any 50/50 potassium chloride salt substitute works identically (NoSalt and NuSalt are close cousins; check the label, as pure KCl products are stronger). Food routes work too: cream of tartar carries about 495 mg potassium per teaspoon, and coconut water or a splash of orange juice add potassium plus flavor, though with sugar attached.
Is a homemade electrolyte drink as good as LMNT or Gatorade?
The electrolytes are the same ions; your body cannot tell branded sodium from kitchen sodium. The zero-sugar preset here reproduces the LMNT-style 1000 mg sodium / 200 mg potassium ratio for a few cents per litre versus about $1.50 per packet. What you give up is convenience, flavoring, and exact consistency; what you gain is cost and control over sugar.
Do I need sugar in an electrolyte drink?
Depends on the job. During long exercise, 4-8% carbohydrate provides fuel and speeds fluid absorption, which is why sports drinks contain it. For rehydration after illness, glucose actively helps the gut absorb sodium and water, the mechanism oral rehydration solutions are built on. For everyday sipping or fasted training, skip it: the zero-sugar preset exists for exactly that.
Is it safe to drink electrolyte drinks every day?
If you sweat regularly, replacing what you lose is the point, and a litre of the sports-drink mix carries about a fifth of the FDA's 2,300 mg daily sodium guideline. If you barely sweat and eat a typical high-sodium diet, a strong daily mix mostly adds sodium you do not need. Match the mix to your sweat, and if you have high blood pressure or kidney disease, ask your doctor first; potassium-based salt substitutes in particular can be dangerous with some kidney conditions and medications.
Do I need magnesium in my electrolyte drink?
It is optional. Sweat magnesium losses are small compared to sodium, and most magnesium needs are met by food. LMNT-style mixes include about 60 mg per serving, so the zero-sugar preset lists it as an optional add via magnesium citrate or malate powder. Skip magnesium oxide, which is poorly absorbed, and skip it entirely rather than guessing if you have kidney problems.
When do I actually need electrolytes instead of plain water?
For everyday life and workouts under about an hour, water and normal food cover you. Electrolytes start mattering with over an hour of real sweating, long hikes in heat, illness with fluid loss, low-carb or fasted training, and jobs spent sweating. The tell-tale signs of running salty: white streaks on clothing, stinging eyes, and feeling flat despite drinking plenty of water.
Sources
- American College of Sports Medicine (2007). Position Stand: Exercise and Fluid Replacement.
- World Health Organization. Oral rehydration salts formulation and diarrhoeal disease.
- FDA. Sodium in Your Diet (daily value guidance).
- USDA FoodData Central (salt, salt substitute, and sugar nutrient data).
- LMNT. Electrolyte ratio reference (1000 mg Na / 200 mg K / 60 mg Mg).