Making electrolyte water at home requires just three core ingredients: water, salt, and a source of sugar. A basic recipe calls for mixing 1 liter of water with about ¼ teaspoon of table salt, 2 tablespoons of sugar, and a squeeze of citrus for flavor and potassium. The key is getting the ratio right, because the balance between sodium and glucose is what actually drives hydration at the cellular level.
Why Salt and Sugar Work Together
Plain water hydrates you, but it doesn’t replace the minerals you lose through sweat, illness, or exercise. Adding salt and sugar to water does more than replace those minerals. It changes how your body absorbs the water itself.
Your small intestine has a protein called SGLT1 that acts as a gateway, pulling sodium and glucose into your cells simultaneously. Water follows along through this same pathway. The optimal ratio for this transporter is 1:1 sodium to glucose. That’s the principle behind every oral rehydration solution used in hospitals and disaster relief worldwide, and it’s the same principle behind your kitchen version. Without glucose, sodium absorption slows. Without sodium, the glucose doesn’t trigger the same water uptake. You need both.
The Basic Recipe
This version hits the targets that matter for everyday hydration after exercise, a hot day, or mild stomach illness.
- Water: 1 liter (about 4 cups), filtered or boiled and cooled
- Table salt: ¼ teaspoon (provides roughly 500–600 mg sodium)
- Sugar: 2 tablespoons (about 24 grams)
- Lemon or lime juice: juice of ½ lemon for flavor and a small potassium boost
Stir until the salt and sugar dissolve completely. The drink should taste slightly less salty than tears. If it tastes noticeably salty, you’ve added too much. That rule of thumb is surprisingly reliable.
The WHO’s recommended oral rehydration solution targets an osmolarity of 245 mOsm/kg. You won’t be measuring osmolarity in your kitchen, but sticking close to the recipe above keeps you in a reasonable range. Going heavier on sugar or salt pushes the concentration higher, which can actually pull water out of your cells instead of into them.
Adding Potassium
Sweat and diarrhea both deplete potassium, so a complete electrolyte drink should include some. You have a few kitchen-friendly options.
Cream of tartar is the easiest pantry source. A single teaspoon contains about 495 mg of potassium, which is a substantial dose. For a liter of electrolyte water, use just ¼ teaspoon (roughly 125 mg potassium) to keep the balance reasonable. It has a slightly tart, neutral flavor that blends well.
Lite Salt (like Morton’s version) is a blend of sodium chloride and potassium chloride. A quarter teaspoon delivers 290 mg sodium and 350 mg potassium. If you swap Lite Salt for regular table salt in the recipe above, you get both minerals in one step without changing anything else. This is the simplest upgrade.
Citrus juice contributes a modest amount of potassium on its own. One lemon’s worth of juice provides about 58 mg of potassium and just over a gram of sugar, so it won’t throw off your ratios. It’s not enough potassium by itself, but it adds up alongside other sources.
Flavor Variations
The basic recipe tastes fine but gets boring fast. Here are ways to make it something you’ll actually want to drink, without undermining the electrolyte balance.
Honey can replace white sugar at a 1:1 ratio by volume. It dissolves more slowly, so use warm (not boiling) water and stir thoroughly. Coconut water can replace plain water for part of the mix. Try half coconut water, half plain water, and reduce the sugar to 1 tablespoon since coconut water contains its own sugars. A few fresh mint leaves or a splash of orange juice work well for variety. Avoid adding large amounts of fruit juice, though, because the extra sugar shifts the sodium-to-glucose ratio and raises osmolarity.
Common Mistakes to Avoid
The most dangerous error is using too much salt. Excess sodium in a homemade drink can cause headaches, nausea, confusion, and in extreme cases, a condition called hypernatremia. This is especially risky for children, who are more sensitive to sodium concentration. Measure carefully with proper measuring spoons rather than eyeballing it. A “pinch” is not a unit of measurement when salt balance matters.
Using too much sugar is less immediately dangerous but counterproductive. A hypertonic solution (one with too much dissolved stuff) pulls water into the gut instead of absorbing it, which can worsen diarrhea or cause bloating. Two tablespoons of sugar per liter is the ceiling, not the floor.
People with kidney disease should be cautious with homemade electrolyte drinks. Impaired kidneys struggle to clear excess sodium and potassium, so adding these minerals freely can be harmful. The same applies to anyone on blood pressure medications that affect electrolyte balance.
How Long It Keeps
Homemade electrolyte water doesn’t last as long as you might expect. At room temperature, use or discard it within 12 hours. Refrigerated, it stays safe for up to 24 hours. The sugar and salt solution is a hospitable environment for bacteria once it’s been sitting out, and there are no preservatives to slow growth. Making it fresh each time you need it takes under two minutes, so there’s little reason to batch large quantities.
When Homemade Is Enough
For everyday situations like post-workout recovery, gardening in the heat, a mild hangover, or a bout of stomach flu, a homemade electrolyte drink works well. It covers the same basic territory as commercial sports drinks at a fraction of the cost, without the artificial colors, sweeteners, or inflated sodium levels some brands include.
Severe dehydration is a different story. If you or a child can’t keep fluids down, show signs of confusion or rapid heartbeat, or have had prolonged vomiting or diarrhea lasting more than a day, the situation has moved past what a kitchen recipe can address. Intravenous fluids work through a completely different mechanism and can restore volume far faster than anything you drink.