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Vinyl Record Calculator — Play Time by RPM, Size & Groove Spacing

How much music fits on a vinyl record? Calculate play time instantly

Total Play Time

50m 38s

Per Side

25.3 min

Revolutions

844

Total Play Time

50m 38s

2 sides

Per Side

25.3 min

Revolutions

844

Groove Details

Groove Length1795 ft (547 m)
Total Revolutions844

Example Calculations

112" LP at 33⅓ RPM

Inputs

Disc Size12" LP
RPM33⅓
Groove Spacing0.004"
Sides2

Result

Total Play Time42m 6s

Groove width = 5.75 - 2.375 = 3.375". Revolutions = 3.375 / 0.004 = 843.75. Time per side = 843.75 / 33.333 = 25.3 min. Total = 50.6 min for 2 sides.

27" Single at 45 RPM

Inputs

Disc Size7" Single
RPM45
Groove Spacing0.004"
Sides2

Result

Total Play Time9m 22s

Groove width = 3.375 - 2.375 = 1". Revolutions = 250. Time per side = 250 / 45 = 5.56 min.

Frequently Asked Questions

Q

How long does a 12-inch vinyl LP play?

A standard 12" LP at 33⅓ RPM plays 18-22 minutes per side with normal groove spacing (0.004"). Wider grooves = louder but shorter. Audiophile 45 RPM pressings use wider grooves and play 12-15 minutes per side.

  • 12" at 33⅓: 18-22 min per side (standard)
  • 12" at 45: 12-15 min per side (better sound)
  • 10" at 33⅓: 12-15 min per side
  • 7" at 45: 4-5 min per side (singles)
  • Total LP: 36-44 minutes (both sides)
FormatRPMPer SideTotal
12" LP33⅓18-22 min36-44 min
12" Single4512-15 min24-30 min
10" EP33⅓12-15 min24-30 min
7" Single454-5 min8-10 min
Q

Does groove spacing affect sound quality?

Yes. Wider grooves (less play time) allow louder mastering with more dynamic range and better bass. Narrow grooves fit more music but with lower volume and more distortion at inner grooves.

  • Standard spacing: 0.004" (100 grooves per inch)
  • Wide spacing: 0.006" (louder, better dynamics)
  • Narrow spacing: 0.003" (more time, less quality)
  • Inner grooves always have worse quality than outer
  • Audiophile pressings use wider spacing at 45 RPM
Q

How long is the groove on a vinyl record?

A typical 12" LP has about 500-600 feet of groove per side (150-180 meters). At 33⅓ RPM with standard spacing, the groove makes roughly 840 revolutions from outer edge to the label area.

  • 12" LP: ~500-600 ft per side
  • 7" single: ~150-200 ft per side
  • Groove is a continuous spiral
  • Inner groove diameter: ~4.75"
  • Outer groove diameter: ~11.5" (12" record)
Q

Why does 45 RPM sound better than 33?

At 45 RPM, the groove moves past the stylus faster, so each second of audio is spread over more vinyl. This means wider grooves, better high-frequency response, and less inner-groove distortion. The trade-off is shorter play time per side.

  • More groove length per second of audio
  • Better high-frequency reproduction
  • Less inner-groove distortion
  • Wider groove = better dynamic range
  • Trade-off: only 12-15 min per side on 12"

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Last Updated: Mar 20, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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