Formats of Phonograph Records

 Standard Formats of Phonograph Records

Diameter Finished Diameter Name Revolutions per minute Approximate duration
16 in (41 cm) 15+1516″ ±332 Transcription disc 33+13 rpm * 15 min/side
12 in (30 cm) 11+78″ ±132 LP (Long Play) 33+13 rpm * 22 min/side
Maxi Single, 12-inch single 45 rpm 15 min/side
Single 78 rpm 4–5 min/side.
10 in (25 cm) 9+78″ ±132 LP (Long Play) 33+13 rpm * 12–15 min/side
EP (Extended Play) 45 rpm 9–12 min/side
Single 78 rpm 3 min/side
7 in (18 cm) 6+78″ ±132 EP (Extended Play) 33+13 rpm 7 min/side
EP (Extended Play) 45 rpm 8 min/side
Single 45 rpm 5+13 min/side

(source: https://en.wikipedia.org/wiki/Phonograph_record)

* In the bibliographic data documentation of the recordings presented here, we always give 33+13  revolutions per minute as 33 R.P.M. [33rpm] for the sake of simplicity.

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