Difference Between LP and Vinyl | One Is Plastic, the Other Is a Format

An LP is a specific type of vinyl record with a 12-inch diameter and 33 ⅓ RPM playback speed, while “vinyl” refers to the plastic material used to make almost all modern records, including singles and EPs.

It’s an honest stumble. You browse a record shop or an online catalog, see “LP” and “vinyl” used as if they mean the same thing, and assume you’re looking at interchangeable labels. They aren’t. One names the physical substance a record is pressed from; the other names a precise format with defined dimensions, speed, and runtime. Getting the difference straight matters if you want the right turntable setting, the correct playback speed, and an end to the confusion every time someone calls a 7-inch single “an LP.” Here is the exact breakdown, from the groove width to the industry rules that separate a full album from an extended play.

What Is Vinyl, Technically?

Vinyl is the raw material. Modern records are pressed from a polyvinyl chloride (PVC) copolymer, a plastic derived from crude oil. It replaced shellac in the late 1940s because it was lighter, more durable, and quieter during playback. Every record you buy today — whether it’s a 12-inch LP, a 7-inch single, a 10-inch EP, or even a reproduction 78 RPM disc — is made from this same black plastic compound. The term “vinyl” describes the stuff the disc is made of, not the disc’s size, speed, or track count.

Old shellac records from the early 20th century are not vinyl. If a record feels heavy, slightly flexible, and black, it is almost certainly vinyl. If it feels brittle and thick, it is probably shellac. Collectors encounter this distinction when handling pre-1948 pressings.

What Is an LP, Exactly?

LP stands for “Long Play,” and it is a specific format standard introduced by Columbia Records in 1948. Its key specifications define it clearly: 20 to 30 minutes of music per side, 8 to 12 tracks, and a total runtime of 30 to 60 minutes. The grooves use the “microgroove” standard, with roughly 224 to 300 grooves per inch, each about 0.001 inches deep. That tight groove density is what allows a full album to fit on one disc.

An LP is a vinyl record, but not every vinyl record is an LP. A 7-inch 45 RPM single is also vinyl, but it holds one or two tracks and runs about three to eight minutes total. That single is not an LP. An EP (Extended Play) is typically a 10-inch or 7-inch disc playing at 45 RPM, holding three to six tracks and running 15 to 25 minutes. That is also not an LP. In every case, the material is vinyl; only the 12-inch, 33 ⅓ RPM, full-album format earns the name LP.

The distinction matters when you set up a turntable. An LP requires the 33 ⅓ RPM speed setting. Drop the stylus on an LP set to 45 RPM and you get the Chipmunks version of the album — and a potential wear problem if the speed mismatch persists.

LP vs. Vinyl: Key Differences at a Glance

Why the Confusion Exists

The casual use of “vinyl” to mean “LP” is everywhere — in record store bins, streaming service categories, and music journalism. It is a shorthand that stuck because the LP was the dominant vinyl format for decades. When someone says “I collect vinyl,” they almost always mean they collect LPs. But the same person owns 7-inch singles and maybe a few EPs. Those are also vinyl, yet nobody calls a 7-inch single “vinyl” with the same implied meaning. The material is always vinyl; the format is what changes.

Streaming platforms and industry bodies add another layer. Spotify and Apple Music define an EP as 4 to 6 songs under 30 minutes and an LP as 10 or more tracks exceeding 40 minutes — applying the old vinyl logic to digital releases that have no physical disc at all. The RIAA defines an EP as 3 to 5 songs under 30 minutes. The Grammy awards set a different bar: 5 or more songs with a runtime over 15 minutes. None of these definitions involve vinyl as a material, yet the terms persist because the LP’s historical shadow is long.

How to Identify an LP in Your Collection

Grab the record and check three things:

• Diameter. Measure across the disc. If it is 12 inches, it might be an LP. If it is 7 inches, it is a single or an EP — not an LP.
• Speed label. Look at the center label or the runout groove. Most LPs are printed with “33 ⅓ RPM.” A record labeled 45 RPM is not an LP, even if it is 12 inches (some 12-inch maxi-singles exist at 45 RPM).
• Track count. If the record has fewer than 8 tracks on one side, it is likely an EP or single, not an LP.

When you confirm all three, you have an LP. That matters for correct playback — drop the stylus with the turntable set to 33 ⅓ and let the microgroove do its work. For a deep dive into specific classic pressings, including the iconic 1989 vinyl release, check our roundup of top-shelf LPs: the best 1989 vinyl LP pressings.

Common Mistakes That Damage Records or Ruin Playback

Speed errors top the list. Playing an LP at 45 RPM distorts the audio and can cause tracking issues over time. Setting a 45 RPM single to 33 ⅓ makes it drag into a slow, warbling mess. Learning to read the speed label before you drop the stylus saves every listen.

Stylus mismatch is a close second. LPs use microgrooves — very fine, closely spaced grooves with a stylus tip radius of about 0.0007 inches. A 78 RPM stylus is wider (about 0.003 inches) and will ride high in a microgroove, scraping the walls and permanently damaging the record within one or two plays. Never use a 78 stylus on any modern vinyl record.

Weight assumptions catch new collectors. Not every LP is a heavyweight 180-gram pressing. Standard pressings from the 1950s through the 1990s weigh 120 to 140 grams. During the 1970s oil crisis, some budget pressings dropped as low as 80 to 100 grams. A thin record is not automatically a low-quality pressing; it is often just a product of its era and its raw-material cost.

The LP’s Origin Story

Columbia Records introduced the LP in 1948, and it became the new US industry standard within a few years. Before that, 78 RPM shellac records were the norm — heavy, brittle, and limited to about 5 minutes per side. The LP’s microgroove technology and 33 ⅓ RPM speed allowed a full symphony or album to fit on a single disc, changing how people listened to music. Stereo sound was added in 1957. The LP reigned for about 40 years before CDs pushed vinyl aside in the 1990s. Its modern revival began around 2008, with vinyl sales climbing every year since.

Every Major Vinyl Format, Compared

Final Distinction: What You Actually Own

When you buy a “vinyl record,” ask yourself: what size is the disc, how fast does it spin, and how many songs are on it? If the answer is 12 inches, 33 ⅓ RPM, and 8 to 12 tracks, you own an LP. If the answer is anything else, you still own vinyl — but it is a single or an EP. The material is the same; the format is what changes how you play it and what you call it. Keeping the two straight stops the most common mislabeling mistake in every record collection and every conversation about it.