How to find the chords in any scale

Hello! today i will be discussing about how to know the chords present in any scale. For this lesson i will be using the basic major scale. Lets do this in the key of G. You must be knowing that the notes in the G major scale are G,A,B,C,D,E and F#. If you don't know how to form the major scale, refer to my lesson about scales.
Now as there are 7 notes in the major scale, there will be seven chords in this scale. Let us see how to form chords from the G major scale. The first note is G. So let us first make a chord with the root note as G.
The notes in G major are (in a cyclic manner): G A B C D E F# G A B C D E F# G A B C D E F# G A......
Now a simple rule can be followed to form chords and that is "START TAKING ALTERNATE NOTES STARTING WITH THE ROOT NOTE".
So, our root note is G. And now we have to take the alternate note. So skip A and add B. Again skip C and add D. Again you can skip E and add F#. You can go on like this until you find that the notes have started getting repeated. Also a chord must have minimum of 3 notes. (power chords are exceptions).
So taking 3, 4 and 5 notes according to the rule, the chords that can be formed with the G as root are:
G MAJOR: (G-B-D)
G MAJOR SEVENTH: (G-B-D-F#)
G MAJOR NINTH: (G-B-D-F#-A)
and so on.

Try to find the chords by taking another root note from the scale notes and see what comes out.
For a quick look, here is a list of what kind of chords can be constructed on each degree of the major scale.

I: major
II: minor
III: minor
IV: major
V: major
VI: minor
VII: diminished

;) you must have heard many times about the 1-4-5 chord progression. And there are many more chord progressions too. I hope now you know what 1-4-5 means! In the key of G, 1-4-5 would be G major, C major and D major. These are three note chords and if you want to make the sound of these chords complex add more notes to them to make them 7th or 9th chords or add more notes to make them 13th etc etc.