Making electrolyte water at home requires just water, salt, sugar, and optionally a source of potassium. The simplest version takes under two minutes: stir half a teaspoon of salt and two tablespoons of sugar into one liter of water. That basic combination works because salt and sugar together trigger a transport system in your small intestine that pulls water into your body far more efficiently than plain water alone.
Why Salt and Sugar Work Together
Your small intestine has a dedicated gateway that moves sodium and glucose (the sugar your body breaks table sugar into) across the intestinal wall as a pair. For every molecule of glucose and two sodium ions that cross, water follows passively through the osmotic pull they create. This system absorbs roughly 6 to 7 liters of fluid per day and is the entire basis behind oral rehydration therapy. Plain water lacks this one-two punch, which is why electrolyte water hydrates you faster during illness, heavy sweating, or prolonged exercise.
The ratio matters more than the exact ingredients. Too much sugar and the solution becomes harder to absorb. Too much salt and it tastes terrible, or worse, it could raise your sodium levels uncomfortably high. The recipes below keep the balance in a range that your gut can handle efficiently.
The Basic Kitchen Recipe
This is the simplest formula, adapted from clinical rehydration guidelines and published by Alberta Health Services:
- Water: 4 cups (1 liter)
- Table salt: ½ teaspoon (about 3 grams)
- Sugar: 2 tablespoons (about 30 grams)
Stir until everything dissolves completely. The result tastes mildly sweet and slightly salty. If you want to get closer to the formula used in medical rehydration worldwide, add ¼ teaspoon of a potassium-based salt substitute (sold under brand names like No Salt) and ½ teaspoon of baking soda in place of plain salt’s full amount. The baking soda acts as a buffer similar to the citrate in clinical formulas, and the salt substitute supplies potassium, which you lose through sweat and illness alongside sodium.
For reference, the official World Health Organization oral rehydration formula contains 2.6 grams of sodium chloride, 1.5 grams of potassium chloride, 2.9 grams of trisodium citrate, and 13.5 grams of glucose per liter. You don’t need to match this precisely at home, but it gives you a sense of the proportions: the sugar content is moderate (not sweet like juice), and the salt is noticeable but not overpowering.
Fruit Juice Variations
Juice adds natural sugar, potassium, and flavor all at once, making the drink more pleasant to sip throughout the day. Two options work well:
Orange juice version: Combine 1 cup of 100% orange juice with 4 cups of water, ½ teaspoon of salt, ¾ teaspoon of baking soda, and about 2½ tablespoons of sugar. The orange juice contributes potassium and citric acid, which both improves taste and helps preserve the drink if you refrigerate it.
Apple or grape juice version: Mix ¾ cup of 100% apple, grape, or grapefruit juice with 3¼ cups of water and ½ to ¾ teaspoon of salt. This version is slightly simpler and works well for people who find citrus too acidic on an upset stomach.
Coconut Water as a Base
Coconut water is naturally rich in potassium, with roughly 470 milligrams per cup, but it’s low in sodium at only about 30 milligrams per cup. That potassium-heavy, sodium-light profile means coconut water on its own isn’t a complete electrolyte drink. You can fix this easily: add ¼ to ½ teaspoon of salt per liter of coconut water. If you’re using it during exercise, stir in a tablespoon of honey or sugar to bring the glucose content up to a level that activates the sodium-glucose absorption pathway.
Savory Options
Not everyone wants a sweet drink, especially when nauseous. Broth-based electrolyte water works surprisingly well. Dissolve one regular-sodium bouillon cube in 4 cups of water, add ¼ teaspoon of salt and 2 tablespoons of sugar. Alternatively, stir about 2 tablespoons of miso paste into a liter of warm water with sugar. Both versions deliver sodium naturally from the broth or miso, and the sugar provides the glucose your intestine needs to absorb it all. Tomato juice also works: blend 2½ cups of regular tomato juice with 1½ cups of water for a savory option that already contains both sodium and potassium.
How to Flavor It Without Ruining It
Citric acid, whether from a squeeze of lemon, lime, or a pinch of powdered citric acid, is the easiest way to make electrolyte water taste less “medical.” Citric acid enhances flavor, masks saltiness, and acts as a mild preservative that keeps your batch fresher in the fridge. A quarter of a lemon or lime squeezed into a liter is enough. You can also add a splash of fruit concentrate, a few cucumber slices, or fresh mint leaves. Avoid adding large amounts of juice beyond what the recipes call for, since excess sugar shifts the osmolarity of the drink and can slow absorption or cause stomach discomfort.
When You Actually Need Electrolyte Water
Plain water handles most daily hydration needs perfectly well. Electrolyte water becomes genuinely useful in a few specific situations: exercise lasting more than two hours, heavy sweating in hot or humid conditions, vomiting or diarrhea that causes ongoing fluid loss, or recovery from a hangover. For workouts under two hours at moderate intensity, water alone is sufficient for most people.
During prolonged sweating, you lose sodium at rates that vary from person to person but can reach meaningful levels over several hours. If you notice white salt marks on your clothes or hat after exercise, you’re a heavier salt sweater and benefit more from electrolyte replacement. Sipping electrolyte water throughout the activity rather than chugging it afterward gives your intestine time to absorb it steadily.
Getting the Ratio Wrong
The most common mistake is adding too much salt. Excess sodium in a concentrated drink can actually worsen dehydration by pulling water out of your cells rather than into them. In extreme cases, consistently high sodium intake without enough water leads to symptoms like confusion, irritability, lethargy, and muscle weakness. This is unlikely from a single glass that’s slightly too salty, but it’s a real concern if you’re mixing batches carelessly over the course of a sick day or long event.
Stick to the measurements rather than eyeballing them. A half teaspoon of salt per liter is a reliable ceiling for homemade recipes. If the drink tastes noticeably salty, like broth rather than a sports drink, dilute it with more water. Too much sugar is less dangerous but can cause cramping or diarrhea, especially in children. The two-tablespoons-per-liter guideline keeps sugar in the range where it helps absorption without overwhelming your gut.
Storage and Shelf Life
Homemade electrolyte water doesn’t contain preservatives, so treat it like any perishable drink. Refrigerate it and use it within 24 hours. If you’ve added fruit juice, the citric acid gives you a small buffer, but the drink can still grow bacteria at room temperature. For longer outings, freeze portions in ice cube trays or small bottles and let them thaw as you go. If the drink develops an off smell or taste, discard it and mix a fresh batch.