Making your own electrolyte water takes about two minutes and four kitchen ingredients: water, salt, sugar, and a squeeze of citrus. The basic formula is simple because the science behind it is simple. Your intestines absorb water fastest when it arrives with a small amount of sodium and glucose together. A homemade version costs pennies per liter and can match or outperform what you’d buy at the store.
Why Sugar and Salt Work Together
Plain water hydrates you, but it doesn’t hydrate you as quickly as water that contains both sodium and glucose. Your small intestine has a specialized transport system that pulls sodium and glucose molecules across the intestinal wall in a fixed 2:1 ratio. Every time a pair of sodium ions and a glucose molecule move through, water follows by osmosis. This is the same principle behind medical oral rehydration solutions used worldwide to treat dehydration from illness. The sugar isn’t just for taste. Without it, the sodium can’t cross efficiently, and without sodium, the water absorption slows down.
This is also why sports drinks contain both sugar and salt, not just one or the other.
The Basic Recipe
This recipe, based on the World Health Organization’s oral rehydration formula adapted for home kitchens, makes one liter (about 4 cups):
- Water: 4 cups (1 liter), clean and room temperature or cool
- Sugar: 2 tablespoons (30 grams)
- Table salt: ½ teaspoon (3 grams)
- Baking soda: ½ teaspoon (3 grams)
- Salt substitute (potassium chloride): ¼ teaspoon (1.5 grams)
Stir until everything dissolves completely. That’s it. The baking soda adds bicarbonate, which helps balance acidity in your body during dehydration. The salt substitute (sold under brand names like No Salt) provides potassium, the other major electrolyte you lose in sweat and illness. If you don’t have salt substitute on hand, the recipe still works without it, though you’ll get less potassium.
A Simpler Everyday Version
If you’re making electrolyte water for general hydration after exercise or a hot day rather than treating serious dehydration, you can simplify things. Utah State University’s extension program recommends this lighter approach:
- Water: 4 cups
- Salt: ¼ to ½ teaspoon
- Sweetener: 2 to 4 tablespoons of sugar, honey, or agave
- Citrus juice: juice from half a lemon or half an orange
The citrus juice does double duty. It improves the flavor significantly (plain salt water is not pleasant to drink) and adds a modest amount of potassium. Lemon juice contains about 103 mg of potassium per 100 grams, while orange juice contributes even more. If you want to boost the potassium further without a salt substitute, use coconut water as your base instead of plain water. Coconut water contains roughly 165 mg of potassium per 100 grams, plus small amounts of magnesium.
How It Compares to Store-Bought Options
The electrolyte content of commercial drinks varies enormously. Sports drinks like Gatorade contain about 20 milliequivalents of sodium per liter and only 3 milliequivalents of potassium. That’s relatively dilute. Pediatric rehydration solutions like Pedialyte are significantly stronger, with 45 to 50 milliequivalents of sodium and 20 milliequivalents of potassium per liter.
The WHO-based homemade recipe lands closer to Pedialyte’s range, making it a better choice for actual dehydration from illness, heavy sweating, or heat exposure. The simpler everyday recipe with less salt is more comparable to a sports drink. You can adjust the salt content up or down depending on your situation. More salt for recovering from a stomach bug or long endurance exercise, less salt for casual daily hydration.
Flavor Variations That Actually Work
The biggest obstacle to homemade electrolyte water is that it can taste medicinal. A few adjustments make it something you’ll actually finish drinking.
For a citrus version, use the juice of a full lemon or lime and replace some of the sugar with honey. For a tropical version, swap half the water for coconut water, which adds natural sweetness, potassium, and magnesium. You can also muddle fresh mint or ginger into the water before adding the other ingredients. A splash of 100% fruit juice (grape, pomegranate, orange) works well too, though it adds extra sugar, so reduce the added sweetener accordingly.
Cold temperatures mask the saltiness. Chilling the finished drink or adding ice makes a noticeable difference in how it tastes.
Getting the Salt Right
Salt is the ingredient that matters most for rehydration and the one most worth measuring carefully. Half a teaspoon of table salt contains roughly 1,150 mg of sodium. The recommended daily limit for adults is less than 2,300 mg total, and most Americans already consume about 3,400 mg per day from food. One liter of the full-strength recipe uses about half your daily sodium budget.
For everyday use when you’re not significantly dehydrated, the lower end of the range (¼ teaspoon per liter) is a reasonable choice. If you’re making this to recover from vomiting, diarrhea, or heavy prolonged exercise, the full ½ teaspoon is appropriate. Sip it over the course of an hour or two rather than drinking it all at once, which gives your gut time to absorb it efficiently and reduces any nausea.
For children, sodium limits are lower, so use the reduced-salt version and smaller serving sizes.
Adding Magnesium
Most commercial electrolyte products now include magnesium, and you can add it to your homemade version too. The simplest approach is using coconut water as your liquid base, which naturally provides about 15 mg of magnesium per cup. If you want more, a small amount of food-grade magnesium citrate powder can be stirred in. Adults generally need 310 to 420 mg of magnesium per day from all sources (food, drinks, and supplements combined), so a pinch in your electrolyte water contributes without overdoing it.
Storage and Shelf Life
Homemade electrolyte water doesn’t contain preservatives. If you’re using plain water and dry ingredients only, it keeps in the refrigerator for up to 24 hours. If you’ve added fresh citrus juice, coconut water, or honey, treat it like any fresh beverage and use it the same day. You can premix the dry ingredients (salt, sugar, baking soda, salt substitute) in a jar and store that powder indefinitely at room temperature. When you need a drink, scoop out the right amount and stir it into water.
A convenient dry mix ratio for multiple servings: 6 tablespoons sugar, 1½ teaspoons salt, 1½ teaspoons baking soda, and ¾ teaspoon salt substitute. Store in a sealed container. Use one-third of this mix per liter of water.