Yes, cider is acidic. Both sweet (non-alcoholic) apple cider and hard (fermented) cider typically fall in the pH range of 3.0 to 4.0, making them comparable in acidity to orange juice and many soft drinks. For reference, pure water sits at a neutral pH of 7, and anything below 7 is considered acidic.
How Acidic Cider Actually Is
Apple cider gets most of its acidity from malic acid, the same compound that gives green apples their tart bite. Fresh apple juice used for cider production typically has a pH around 3.4 and contains roughly 4 grams per liter of acid. A tart cider can dip to a pH of 3.0, while a milder, sweeter cider might sit closer to 4.0. Once pH climbs much above 4.0, the cider becomes less stable and more vulnerable to spoilage from unwanted bacteria.
In one lab study measuring the pH of common beverages available to American consumers, apple cider registered a pH of 3.7. That puts it squarely in the acidic range, though not as extreme as lemon juice (pH 2.25) or cola (pH 2.3 to 2.4).
How Cider Compares to Other Drinks
Cider’s acidity is middle-of-the-pack among popular beverages. Here’s how it stacks up:
- Lemon juice: pH 2.25
- Cola (Coca-Cola, Pepsi): pH 2.3 to 2.4
- Sodas overall: average pH 3.12
- Fruit juices overall: average pH 3.48
- Apple cider: pH 3.4 to 3.7
- Coffee: pH 5.11
So cider is roughly as acidic as the average fruit juice and slightly less acidic than most sodas. It’s noticeably more acidic than coffee, which surprises many people who associate coffee with stomach discomfort.
Does Fermentation Change the Acidity?
Fermentation transforms sweet cider into hard cider, and it shifts the acid profile in interesting ways. As yeast converts sugar into alcohol, it also produces organic acids like succinic acid as byproducts. Some of the alcohol itself can convert into additional acids during fermentation. The net result is that hard cider often retains or even increases its overall acidity compared to the fresh juice it started as.
There’s one exception. A secondary fermentation process called malolactic fermentation converts malic acid into lactic acid, which tastes softer and less sharp. Since apples are almost entirely malic acid, this conversion can cut the perceived acidity roughly in half. Cidermakers sometimes encourage this process deliberately to produce a smoother, rounder cider. So two hard ciders can have very different levels of tartness depending on how they were made, even if their pH readings are similar.
What Cider’s Acidity Means for Your Teeth
Tooth enamel begins to dissolve when mouth pH drops below about 5.5. At a pH of 3.4 to 3.7, cider sits well below that threshold. The acids in cider lower pH at the tooth surface, which gradually strips minerals from enamel. Over time, this erosion can expose the softer layer underneath, leading to sensitivity and pain.
This doesn’t mean you need to avoid cider entirely. Drinking it with meals rather than sipping throughout the day limits how long your teeth are exposed to acid. Rinsing your mouth with water afterward helps neutralize the pH faster. Waiting at least 30 minutes before brushing is also smart, since enamel softened by acid is more easily damaged by a toothbrush.
What Cider’s Acidity Means for Your Stomach
Your stomach already operates at a pH of 1.5 to 3.5, so cider’s acidity isn’t extreme by comparison. Most people digest cider without issues. However, if you have acid reflux or gastritis, the malic acid in cider can aggravate symptoms by adding to the acid load in your stomach and potentially relaxing the valve between your esophagus and stomach. Drinking cider with food rather than on an empty stomach can reduce the chance of discomfort, since food helps buffer the acid.
Apple cider vinegar, which is sometimes confused with apple cider, is significantly more acidic and concentrated. It’s a different product with different effects on digestion, so the two shouldn’t be treated interchangeably when thinking about acidity.