Homemade vs Store-Bought Electrolytes: The Real Math

Electrolyte mixes are having a moment, and the sticker price invites an obvious question: can I just make this with salt? Mostly, yes — the active ingredients in most mixes are inexpensive minerals you can buy in bulk. So the honest comparison is not whether a homemade recipe "works" as a mix; it is what you trade away for the savings. That trade comes down to four things: precision, consistency, taste, and convenience. Get clear on those and the choice makes itself.

One note before the numbers, and it matters here more than in most of our comparisons: sodium is the headline ingredient in these products, and how much sodium is right for you is individual — a number to set with your clinician, especially if you manage blood pressure or kidney concerns. This is not medical advice, and nothing here is a claim that any electrolyte product treats, prevents, or relieves anything. We are only comparing what is in the serving and what it costs.

The label math, side by side

Using LMNT as the store-bought benchmark, since it publishes its exact amounts.

The table tells the whole story in two rows. On cost, homemade wins by an enormous margin. On everything that is not cost — precision, consistency, magnesium, and grab-and-go ease — the packaged stick wins. Which set of rows matters more to you is the entire decision.

What is actually in a serving

Three minerals do the work, and sodium is the star. LMNT's 1,000 mg is a deliberately high-sodium formula; potassium at 200 mg is the supporting player, and magnesium at 60 mg is a smaller contribution. All three are cheap in bulk — table salt is almost free, potassium comes from "lite salt" style potassium chloride, and magnesium from a citrate or other powder. Nothing here is exotic, which is exactly why homemade is even a conversation.

The cost per serving

This is the gap that sends people to the spice aisle. At $45 for 30 sticks, LMNT runs about $1.50 a serving; a homemade version of the same sodium-and-potassium load costs pennies. Over a month of daily use that is roughly $45 versus a dollar or two — a real difference if electrolytes are an everyday habit rather than an occasional one. Our electrolyte cost-per-serving showdown puts the packaged brands on the same axis, and our LMNT review reads its label line by line.

Precision and consistency

Here the packaged stick earns its premium. Every LMNT serving is the same dose, measured in a factory, with no chance of an off-batch. Homemade, you are eyeballing fractions of a teaspoon, and salt is easy to overshoot — the difference between 1/4 and 1/2 teaspoon is hundreds of milligrams of sodium. If you want to know exactly what you are getting each time, the stick delivers that and a scoop-and-guess recipe does not. For an ingredient as individual as sodium, that precision is worth something real.

Taste, convenience, and the magnesium wrinkle

Two more places the packaged option pulls ahead. Taste: LMNT is formulated to be drinkable, while a homemade mix tends to taste like salt water unless you put in the work with citrus or a flavor addition. Convenience: a stick goes in a bag or a pocket and needs nothing but water, whereas homemade means measuring at the counter — fine at home, awkward at the gym or on a trip. And magnesium is the ingredient homemade handles worst: getting a specific, palatable magnesium dose without a dedicated powder is genuinely fiddly, so most DIY recipes quietly skip it. If magnesium matters to you, that tilts the table toward buying.

A basic starting recipe

If you want to try the homemade route, a plain starting point is a large glass of water, about 1/4 to 1/2 teaspoon of table salt, and about 1/4 teaspoon of a potassium-based "lite salt," with a squeeze of citrus to make it drinkable. Treat those as starting amounts, not a prescription — tune them to your taste and, more importantly, to your clinician's guidance, because the right sodium level is personal and this is the one recipe where guessing high has real downsides for some people.

What the label tells you

Give LMNT credit on the one axis that matters most here: it discloses its exact electrolyte amounts on the label, which is the transparency you are really buying, and it keeps sugar at zero. Like most drink mixes, it does not carry a third-party sport-testing certification — but the doses are printed, which is what lets you compare it to a homemade cup at all. Our hydration basics guide and best electrolyte mixes roundup go further on reading these labels.

The month math, and who each suits

The per-serving numbers add up fast in one direction. A packaged mix at about $1.50 a day is roughly $45 a month, or about $540 a year, if electrolytes are a daily habit. The homemade version of the same sodium-and-potassium load is a dollar or two a month — call it $15 a year. That is a real gap, and it is the strongest case homemade has.

But the gap only bites if you use electrolytes daily. For occasional use — a hot day, a hard workout, a travel week — the packaged premium is a rounding error, and the convenience easily wins; nobody should mix salt water by hand for something they reach for twice a month. The math flips for the daily user, where $500-plus a year for the convenience of a pre-measured stick is worth pausing on, and where a homemade batch mixed once and kept in a jar starts to look sensible.

One more factor tips certain daily users: because homemade handles magnesium poorly, someone who specifically wants that mineral every day may find a packaged stick is the only low-effort way to get a consistent dose, which quietly narrows homemade's cost advantage to the sodium-and-potassium crowd. So the split is really about frequency, setting, and which minerals you care about. The daily-at-home user chasing sodium and potassium has the most to gain from homemade; the occasional user, the traveler, and the person who will simply never measure are better served by the packaged stick, whatever the per-serving premium.

The honest split verdict

Choose homemade if the cost is doing the driving, you do not mind measuring, and you mainly want sodium and potassium — accept that precise magnesium and consistent taste are the price of the savings.

Choose a packaged mix like LMNT if you want an exact, consistent, zero-sugar dose you will actually drink, plus a stick you can carry anywhere. You are paying about $1.50 for precision and convenience, not for anything the minerals themselves do not already do in a homemade cup.

Either way, the electrolytes are the same cheap minerals underneath — the money buys accuracy and ease, nothing more. This is not medical advice, and your sodium target in particular belongs in a conversation with your clinician.