Making Key Signatures Simple to Remember

Piano Chops Theory Trick

Lucky Number 7

A ridiculously simple little number trick that can help you remember some of those annoying key signatures.

Before we talk letters...let's talk numbers! Go with me on this one. 😄

Here's Your Rule

It MUST Equal 7

Whatever number you have, figure out how much more you need to reach 7.

1 + 6 = 7 If you have 1, you need 6.
3 + 4 = 7 If you have 3, you need 4.
5 + 2 = 7 If you have 5, you need 2.

Now Use It With Key Signatures

Here's the easiest way to think about it: if you know one version of the letter, you can figure out the other.

Watch what happens...

If... F Major has 1 flat
Then... F♯ Major has 6 sharps
1 + 6 = 7
If... G Major has 1 sharp
Then... G♭ Major has 6 flats
1 + 6 = 7
If... A Major has 3 sharps
Then... A♭ Major has 4 flats
3 + 4 = 7
If... B♭ Major has 2 flats
Then... B Major has 5 sharps
2 + 5 = 7
That's the whole trick.
Same letter name. Switch between the natural/sharp side and the flat side. The number of sharps and flats will add up to 7.

It Works in Either Direction

Let's say you're trying to remember how many sharps are in B Major, but your brain has completely abandoned you.

Maybe you do remember that B♭ Major has 2 flats.

No problem.

B♭ = 2 Flats
+
B = ?
=
7
Solve It

2 + ? = 7

The missing number is 5. So B Major has 5 sharps!

Get It Yet?! 😄

That's really all there is to it.

It's not some giant music theory breakthrough. It's just one of those goofy little brain tricks that can save you when a key signature refuses to stay in your head.

Just remember: Lucky Number 7. 🎹

— Piano Chops

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