How many grooves on a vinyl record?

The normal commercial disc is engraved with two sound bearing concentric spiral grooves, one on each side of the disc, running from the outside edge towards the centre. Since the late 1910s, both sides of the record have been used to carry the grooves.

There is an area around 6 mm (0.25″) wide at the outer edge of the disk, called the lead-in where the groove is widely spaced and silent. This section allows the stylus to be dropped at the start of the record groove, eliminating the risk of damage to the recorded section of the groove when the stylus head is dropped carelessly onto the record.

Between each track on the recorded section of a LP record, there is usually a short gap of around 1 mm (0.04") where the groove is widely spaced. This space is clearly visible, making it easy to find a particular track.

Towards the label centre, at the end of the groove, there is another wide-pitched section known as the lead-out. At the very end of this section, the groove joins itself to form a complete circle; when the stylus reaches this point, it circles repeatedly until lifted from the record. Automatic turntables rely on the position of the arm, as it reaches these more widely spaced grooves, to trigger a mechanism that raises the arm and moves it out of the way of the record.

Grooves On A Record

Two.

One on each side.

Actually the grooves are spiral moving outwards.

hey I just asked this question, oh well the answer is two one continuous one on each side.

One per side

one

one of course