Tuning a Guitar in Standard Tuning

Standard tuning [low to high] = E-A-D-G-B-E (Eat-Apples-Daily-Goto-Bed-Early). Or something something sweet like that.

Below are reference pitches for tuning a guitar. Each string is plucked 3 times, and once each for All 6.

Level out (match) your strings against the sounded tones. Listen for the 'beats' - the wavering of the tone as it approaches the match point.

Tuning a Guitar using other methods