How to create diatonic chords in F major scale?
F Major Scale
F – G – A – B♭ – C – D – E – F are the notes of the F major scale.

Diatonic chords are formed by stacking two generic third notes above each scale note.

F Major Diatonic Chords
These are the seven major scale diatonic chords that come from the F major scale.

Each major scale diatonic chord is labelled with a roman numeral number:

All major scales follow this chord quality pattern:
I, ii, iii, IV, V, vi, viiº
We use uppercase roman numeral numbers to represent major chords, lowercase to represent minor chords, uppercase with a small plus sign to represent augmented chords, and lowercase with a small circle to represent diminished chords. (1, 4 and 5 chords in major scales will always be major chords. 2, 3 and 6 chords will always be minor chords. 7 chord in major scale will always be diminished chord.)
The seven diatonic chords in the F major key are:
I. F – A – C (F major chord)
ii. G – B♭ – D (G minor chord)
iii. A – C – E (A minor chord)
IV. B♭ – D – F (B Flat major chord)
V. C – E – G (C major chord)
vi. D – F – A (D minor chord)
viiº. E – G – B♭ (E diminished chord)
These are the chords that harmonize the F major scale.
Other Major Scale Diatonic Chords
Diatonic Chords in C Major Scale
Diatonic Chords in C Sharp Major Scale / D Flat Major Scale
Diatonic Chords in D Major Scale
Diatonic Chords in E Flat Major Scale
Diatonic Chords in E Major Scale
Diatonic Chords in F Major Scale
Diatonic Chords in F Sharp Major Scale / G Flat Major Scale
Diatonic Chords in G Major Scale
Diatonic Chords in A Flat Major Scale
Diatonic Chords in A Major Scale
Diatonic Chords in B Flat Major Scale
Diatonic Chords in B Major Scale / C Flat Major Scale
Piano Chord Progression Poster
This practical piano chord progression poster from Amazon is the perfect reference chart of all 24 major and minor chord sets — The Really Useful Piano Chord Progression Poster – A1 Size – Folded Version