Explainer
33 vs 45 vs 78 RPM: Which Speed Does Your Record Play At?
Put a record on at the wrong speed and you get chipmunk vocals or a slow, droopy groan. It's harmless, but it's also confusing when the sleeve doesn't say. Here's how the three speeds work, how to tell which one you have, and what to do about 78s before you drop a modern stylus on one.
Quick answer
- 33⅓ RPM is the standard for 12-inch albums (LPs). Most of your records will be this.
- 45 RPM is the standard for 7-inch singles, and is also used for many 12-inch singles and some audiophile album reissues.
- 78 RPM is an older format, usually shellac, with much wider grooves. It needs a turntable with a 78 setting and a 78-specific stylus.
- When in doubt, check the center label, the sleeve or the run-out area. If it still sounds wrong, just switch speeds; you won't hurt anything.
- Big center hole on a 7-inch? You need a 45 RPM adapter to center it on the spindle.
Record speed is measured in revolutions per minute (RPM): how many times the platter turns in one minute. The groove was cut at a specific speed, and to hear it correctly it has to be played back at that same speed. That's the whole idea. The complication is that three speeds have been common over the years, and sleeves and labels aren't always as clear as they should be.
The three speeds at a glance
| Speed | Typical format | Material | Needs special gear? |
|---|---|---|---|
| 33⅓ RPM | 12-inch LP albums; some 10-inch and 7-inch EPs | Vinyl | No. Every turntable plays it. |
| 45 RPM | 7-inch singles, many 12-inch singles, some 2-disc album reissues | Vinyl | Only a spindle adapter for big-hole 7-inches |
| 78 RPM | Older 10-inch and 12-inch discs from the pre-LP era | Mostly shellac (brittle) | Yes: a 78 setting and a 78 stylus |
You'll occasionally hear about 16 RPM records too. They exist (mostly spoken-word material), but they're rare enough that most people never run into one, and most modern turntables don't offer that speed.
33⅓ RPM: the album speed
The long-playing record, or LP, is the format most new listeners mean when they say "vinyl." A 12-inch disc spinning at 33⅓ RPM with fine "microgroove" spacing fits roughly a typical album side. Unless a record clearly says otherwise, start here.
Almost every turntable sold as a new record player has a 33 setting. On some decks you press a button; on others you move the belt from one step of a pulley to another. If your turntable has a belt you need to move by hand, the manual will show which pulley step is which. It's worth doing gently rather than stretching the belt with your fingernails.
45 RPM: singles, 12-inch singles and "45 RPM reissues"
The 7-inch single is the classic 45. These often have a large center hole, about the size of a coin rather than a pencil. That big hole was designed for jukeboxes and record changers. On a normal turntable spindle it will slide around off-center, so you either need a small insert that snaps into the hole or a 45 adapter that sits on top of the spindle. Both are cheap and worth keeping in a drawer if you buy singles at all.
Two other kinds of 45 trip people up:
- 12-inch singles. Dance, hip-hop and electronic 12-inches are very often cut at 45. They look exactly like an LP from a distance, which is why people play them at 33 and wonder why the vocals sound slow.
- Album reissues spread over two discs at 45. Some premium reissues split one album across more sides so each side can be cut at the faster speed. The pressing will normally say so on the label or sleeve.
Why bother with 45? At the same diameter, a faster spin means more groove passes under the stylus each second, which gives the cutting engineer more room to work with. That's the reasoning behind 45 RPM reissues. Whether you hear a difference depends on the pressing, your system and your ears, so treat it as a nice extra, not a requirement.
78 RPM: the one that needs care
Before the LP, records spun at roughly 78 RPM. Most 78s you'll find at estate sales or in a grandparent's cabinet are shellac, not vinyl. Shellac is heavier and much more brittle: drop one on a hard floor and it can crack or shatter.
The bigger issue is the groove. 78s use a much wider groove than modern records. A standard LP stylus is far too small for it and rides down in the bottom of the groove, where it picks up grit and noise. Worse, it can wear the record and the stylus. To play 78s properly you need:
- A turntable with a 78 setting. Many entry-level turntables only offer 33 and 45. Check the spec sheet or the speed selector before you assume.
- A 78 stylus. Many common cartridges have a dedicated 78 replacement stylus with a much larger tip. You swap it in for 78s and swap your normal stylus back afterward. Some vintage changers used a flip-over cartridge with both styli on one unit.
- The right tracking force for that stylus. A 78 stylus often specifies a different tracking force than the microgroove one. Use whatever the cartridge maker lists for the 78 stylus.
Don't clean shellac like vinyl. Alcohol-based record cleaning fluids can damage shellac. If you plan to clean 78s, use a method or fluid that specifically says it's safe for shellac, and test on a disc you care less about first.
How to tell which speed a record is
Run through these in order. Most records give themselves away in the first two steps.
- Read the center label. Look for "33," "33⅓," "45," "78," "LP," or "RPM" near the hole or the edge of the label.
- Check the back of the sleeve or the spine. Reissues and 12-inch singles often state the speed near the catalog number or the barcode.
- Look at the size and center hole. A 7-inch with a big center hole is almost always 45. A heavy, thick, rigid 10-inch disc with no flex at all is likely a shellac 78.
- Look at the run-out groove. The smooth area near the label sometimes has etched text, and on some 12-inch singles that text includes the speed.
- Just play it. If voices sound slow and deep, try the faster speed. If they sound high and rushed, try the slower one. Switching speeds can't damage a vinyl record or stylus.
One exception to "just play it": don't test-play a suspected 78 with your regular stylus. If the disc is thick, heavy and brittle-feeling, assume it's shellac and wait until you have the correct stylus.
When the speed is right but the pitch still sounds off
If you've confirmed the correct speed and music still sounds a little slow, fast or wobbly, the record may not be the problem. Common causes include:
- A stretched or slipping belt. Belts lose grip over time. A slightly slow, slightly wavering pitch is the classic symptom.
- A dirty or worn drive pulley or idler wheel on older decks.
- A turntable that needs speed adjustment. Many decks have small speed trim controls. A strobe disc or a speed app will tell you how far off you are; we compare both in our guide to the record player speed test.
- An off-center pressing. If pitch rises and falls once per revolution, the hole may be punched off-center. That's a pressing flaw, not your turntable.
Belts are a common culprit and an inexpensive fix. Matching the right replacement is covered in our belt replacement guide.
Does speed matter when you're buying a turntable?
For most people, a turntable that does 33 and 45 is all you need. Look for one where switching between them is easy, because if you buy singles you'll be doing it a lot. A button or a switch is far friendlier than lifting the platter to move a belt, though a manual belt change is perfectly workable for someone who mostly plays albums.
A 78 setting matters if you already own 78s or plan to collect them. If that's you, shop for a deck that lists 78 RPM and confirm a 78 stylus is available for its cartridge. If you only have a box or two of inherited 78s, it can be simpler to keep them safely stored until you decide whether they're worth the setup.
FAQ
Can playing a record at the wrong speed damage it?
No. Playing a vinyl record at 33 when it should be 45, or the other way around, only changes how it sounds. The stylus tracks the groove the same way. The exception is playing a shellac 78 with a modern microgroove stylus, which you should avoid.
Why does my 7-inch single have a big hole in the middle?
Large-hole 7-inch singles were designed for jukeboxes and record changers. On a standard spindle you need a 45 adapter or a snap-in insert so the record sits centered.
Are 45 RPM album reissues better than 33 RPM pressings?
Faster speed gives the cutting engineer more groove length to work with, which is the reasoning behind 45 RPM reissues. Whether you hear a difference depends on the pressing and your system. Mastering and pressing quality usually matter more than the speed alone.
Can I play 78s on a normal turntable?
Only if it has a 78 RPM setting, and only with a 78-specific stylus fitted. A standard stylus is too small for 78 grooves and can wear both the record and the stylus.
How do I know if a record is shellac or vinyl?
Shellac 78s are usually thicker, heavier and completely rigid, and they often feel more brittle. Vinyl LPs and singles flex slightly. Labels on 78s often state the speed as well.
The bottom line
For almost everything you'll buy new, it's 33 for albums and 45 for 7-inch singles, with 12-inch singles and some reissues at 45 too. Check the label, play it, and switch if the vocals sound wrong. The only speed that needs real planning is 78: get the right setting and the right stylus first, and handle those brittle discs carefully.
If you buy singles, a 45 adapter is the one cheap accessory you'll actually use.