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Hey friends, it’s Lizzie! I get asked about these two constantly, and honestly, half the time people are comparing them like they do the same job. They don’t. Celsius is a caffeinated energy drink. Liquid IV (the classic Hydration Multiplier, at least) is a caffeine-free electrolyte powder. So this isn’t really an “either/or” — it’s more like “which problem are you actually trying to solve.” Let’s get into it.
The quick verdict
Need a caffeine boost before a workout or a slow morning? Celsius is your can. Need to actually rehydrate — after a workout, a night out, a stomach bug, or a flight — Liquid IV is doing the real electrolyte work. If you’re dehydrated, Celsius won’t fix that, and if you need energy, Liquid IV’s standard formula won’t give you any.
Celsius vs Liquid IV: the numbers
- Calories: Celsius ~10, Liquid IV ~45
- Caffeine: Celsius ~200mg (from green tea and guarana), Liquid IV Hydration Multiplier 0mg (their separate Energy line has ~100mg)
- Sugar: Celsius 0g (sweetened with sucralose), Liquid IV ~11g (cane sugar and dextrose)
- Sodium: Celsius barely any, Liquid IV ~500mg
- Potassium: Celsius negligible, Liquid IV ~370mg
- Format: Celsius is a ready-to-drink can, Liquid IV is a powder stick you mix into water
That sodium and potassium gap is the whole story here — Liquid IV is built to replace what you actually lose in sweat, and Celsius isn’t trying to.
Caffeine
This is the biggest functional difference and honestly the reason most people are choosing between them in the first place. Celsius gives you a real 200mg — about two cups of coffee — from green tea extract and guarana, which is why it works as a pre-workout or an afternoon pick-me-up. The classic Liquid IV Hydration Multiplier has none. If you want the hydration formula with a caffeine kick, you’d need their separate Energy Multiplier, which runs about 100mg from coffeeberry or matcha/guayusa plus L-theanine for a smoother lift.
Sodium and electrolytes
If actual hydration is the goal, Liquid IV wins this by a mile. ~500mg sodium and ~370mg potassium per stick is a real electrolyte load, the kind you’d want after a long training session, a stomach bug, or a flight. Celsius has next to none — it’s not formulated to rehydrate you, it’s formulated to wake you up. Grabbing a Celsius when you’re actually dehydrated is treating the wrong problem.
Sugar and ingredients
Celsius is zero sugar across the board, sweetened with sucralose, and adds a vitamin B and C blend plus biotin. Liquid IV’s original formula has about 11g of cane sugar per stick (they do sell a Sugar-Free version if that’s a dealbreaker for you), plus vitamin C and a B-vitamin blend of its own. Neither is loaded with anything concerning, but if you’re watching sugar closely and don’t need the sugar-free swap, that’s worth knowing going in.
Taste and format
Celsius is carbonated and drinks like a light energy drink — fruitier and less syrupy than the Monster/Red Bull style. Liquid IV is a powder you tear open and mix into 16oz of water, so it’s flatter and more juice-box-like, no carbonation. If you hate mixing powders mid-workout, that’s a real point in Celsius’s favor logistically — pop the tab and go. If you’d rather sip something over 20 minutes than chug a can, Liquid IV’s format works better for that.
Who each is for
Grab Celsius if you want a genuine energy boost, you like carbonation, and you don’t need the electrolyte load. Grab Liquid IV if you’re actually dehydrated, training hard in heat, recovering from a rough night, or you just want a caffeine-free way to hit your water goals without it tasting like plain water.
Can you use both?
Yes, and a lot of people do — Celsius in the morning for energy, Liquid IV after a workout or before bed for rehydration. Just watch your total caffeine if you’re also having coffee, and remember Liquid IV’s standard formula won’t give you any energy boost to stack with the Celsius.
The bottom line
These aren’t really competitors — they’re solving two different problems that happen to both come in a single-serving format. Pick based on what you actually need that day: energy, or hydration. Most people who love both keep one of each in the pantry.
Cost per can or stick, and where to buy
Single Celsius cans at a gas station or convenience store are the most expensive way to buy it. A 12-pack runs somewhere in the $14–$24 range depending on retailer and whether you catch a sale, which works out to roughly $1.25–$2 per can. Liquid IV’s 14 or 16-count boxes typically run around $25, landing at roughly $1.50–$1.80 per stick. Both get noticeably cheaper if you buy the bigger multi-packs instead of singles.
My honest take
If I need to actually rehydrate, I reach for Liquid IV — the sodium and potassium numbers are doing real work, and it’s the one I’d want after a hard training session or a long travel day. If I need energy without the crash of a coffee refill, Celsius is the easier grab. I don’t think you need to pick a permanent favorite between these two — they’re just not solving the same problem, so keeping both around covers more bases than betting on one.
Frequently asked
Is Celsius or Liquid IV better for a hangover?
Liquid IV, hands down. A hangover is a hydration and electrolyte problem, and Celsius doesn’t address either — it’ll just add caffeine on top of an already dehydrated body.
Can I mix Celsius and Liquid IV together?
You can, though there’s no real need to — you’d mainly be doing it to get caffeine and electrolytes in one sitting. Just be mindful of total caffeine for the day.
Does Liquid IV have any caffeine at all?
The classic Hydration Multiplier doesn’t. Their separate Energy Multiplier line does, at about 100mg per stick.
Is Celsius bad for you if you drink it every day?
For most healthy adults, one can a day is generally considered fine, similar to a strong cup of coffee. If you’re sensitive to caffeine or drinking multiple cans daily, that’s worth reconsidering regardless of brand.
