A basic homemade electrolyte drink requires just three ingredients: water, salt, and a source of sugar. Mixed in the right proportions, this combination actually hydrates you faster than plain water because sodium and glucose work together to pull water through your intestinal wall. Here’s how to make one that works, plus variations for different needs.
Why Sugar and Salt Together Work Better Than Water Alone
Your small intestine has a specific transport system that moves sodium and glucose into your bloodstream as a pair, in a fixed 2:1 ratio of sodium to glucose molecules. When both are present in the right amounts, water follows them through the intestinal wall rapidly. This is the same principle behind medical rehydration solutions used in hospitals and disaster relief worldwide. Plain water lacks this mechanism, which is why you can drink a lot of it and still feel dehydrated after heavy sweating or illness.
The key variable is concentration. A drink that’s too sugary (like most fruit juices or sodas) actually pulls water into your gut instead of absorbing it, causing bloating and diarrhea. The ideal range for fast absorption is an osmolality of 200 to 330 mOsm/L, roughly matching your body’s own fluid concentration. Energy drinks often land between 500 and 800 mOsm/L, which significantly slows fluid uptake. The recipes below stay in the effective range.
The Basic Recipe
This version mirrors the World Health Organization’s oral rehydration formula, simplified for a home kitchen:
- 1 liter (about 4 cups) of water
- 6 level teaspoons of sugar (about 25 grams)
- ½ teaspoon of table salt (about 1,200 mg of sodium)
Stir until everything dissolves completely. That’s it. This delivers sodium and glucose in proportions close to the WHO standard, which uses 13.5 grams of glucose and 2.6 grams of sodium chloride per liter. The home version uses slightly more sugar because table sugar (sucrose) breaks down into glucose and fructose, so you need roughly double the weight to get the same amount of available glucose.
If you find it too salty, reduce the salt to ¼ teaspoon (600 mg of sodium) per liter. This is less effective for serious dehydration but more palatable for everyday use like post-workout hydration. You can add a squeeze of lemon or lime juice for flavor without meaningfully changing the formula’s effectiveness.
A Potassium-Rich Version With Coconut Water
The basic recipe covers sodium and glucose but skips potassium, another electrolyte you lose in sweat. One easy fix is to use coconut water as part of your base. A single cup of coconut water contains around 600 mg of potassium, making it one of the richest natural sources available.
- 2 cups coconut water (unsweetened)
- 2 cups plain water
- ¼ teaspoon table salt
- 1 tablespoon honey or sugar
The coconut water already contains some natural sugars and electrolytes, so you need less added sweetener and salt. This version tastes milder than the basic recipe and works well for moderate exercise or hot weather. It won’t match the WHO formula for treating severe dehydration from illness, but it’s a solid everyday option.
A Citrus Sports Drink
If you want something that tastes closer to a commercial sports drink, citrus juice does the job while adding a small amount of potassium and natural flavor:
- 3 cups water
- 1 cup fresh orange juice
- ¼ teaspoon table salt
- 2 tablespoons honey or maple syrup
Orange juice on its own is too concentrated for efficient hydration (its osmolality is well above the optimal range), but diluting it 3:1 with water brings it into the right zone. The honey rounds out the sugar content and makes it taste less tart. Chill it before drinking if you can. Cold beverages empty from the stomach slightly faster than warm ones.
Adding Magnesium
Magnesium is the third electrolyte commonly depleted during heavy sweating or prolonged exercise. Most adults need 310 to 420 mg of magnesium daily (varying by age and sex), and many people already fall short of that through diet alone. If you want to add it to your drink, magnesium citrate powder dissolves well in liquid and absorbs efficiently. A common supplemental dose is 100 to 200 mg of elemental magnesium, which you can stir into any of the recipes above. Start with a smaller amount, as too much magnesium at once can have a laxative effect.
Getting the Proportions Right
The most common mistake with homemade electrolyte drinks is adding too much sugar. More sugar doesn’t mean more hydration. Once you push past roughly 6 teaspoons per liter, the drink becomes hypertonic, meaning its concentration exceeds your body’s fluids. At that point, your intestines secrete water to dilute the drink before absorbing it, which is the opposite of what you want. If you’re using the drink during a stomach illness with vomiting or diarrhea, keeping sugar levels moderate matters even more, since your gut is already irritated.
Salt is harder to overdo in a single drink, but it’s worth measuring rather than eyeballing. A quarter teaspoon of table salt contains about 600 mg of sodium. For context, one liter of sweat typically contains 400 to 700 mg of sodium, so ¼ to ½ teaspoon per liter replaces what a moderate workout costs you.
Avoid using potassium chloride powder as a substitute for table salt unless you’re confident in your measurements. Potassium is safe in food-level amounts (bananas, coconut water, orange juice), but concentrated potassium chloride powder can cause serious gastrointestinal irritation if not sufficiently diluted. People with kidney problems are at particular risk, since impaired kidneys can’t clear excess potassium efficiently. Stick to whole-food potassium sources for home recipes.
When to Use Each Version
The basic salt-and-sugar recipe is the one to reach for when you’re actually sick: vomiting, diarrhea, fever, or any situation where you’re losing fluids faster than normal. It’s designed for rehydration, not taste, and it works. The coconut water and citrus versions are better suited to daily hydration, exercise, hot weather, or hangovers, situations where you’re mildly depleted rather than clinically dehydrated.
All three versions store in the refrigerator for 24 hours. After that, bacteria can grow in the sugar solution, so make a fresh batch daily. If you’re making it for kids, use the same recipes but offer smaller amounts at a time, since children are more sensitive to electrolyte imbalances.