What is the fastest way to learn key signatures?

Learn the order of sharps (F C G D A E B) and flats (B E A D G C F), then the two shortcuts: last sharp up a letter, and second-to-last flat. Then practice until you name each key without counting.

How do I know if a key signature is major or minor?

The signature alone fits both a major key and its relative minor. Look at the music: minor keys usually raise their 7th note, and pieces tend to start and end on the tonic chord.

Is this key signature practice free?

Yes, with no account. The course adds the interactive circle of fifths, graded quizzes and timed sprints in the practice arena.

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Key Signature Practice

Name the key from its sharps or flats, or work back from a key to its signature. Each question is checked instantly with the rule behind it, so you learn the shortcut as you go. No account needed.

What you can practice

Mixed

Naming sharp keys from the signature
Naming flat keys from the signature
Working back from key to signature
Reading a key signature
How many sharps or flats a key has

Sharp keys

Naming sharp keys from the signature

Flat keys

Naming flat keys from the signature

Minor keys

Minor keys from key signatures
Finding the relative minor

How to practice

Sharps: take the last sharp and go up one letter. Three sharps end on G♯, so the key is A major.
Flats: the second-to-last flat names the key. One flat is F major.
The relative minor starts three semitones below its major key and shares its signature.

Learn it first

A key signature is the group of sharps or flats written at the start of every staff, right after the clef. It tells you which notes are sharp or flat all the way through the music, and which key the music is in: one major key, or its relative minor.

Questions about key signature practice

What is the fastest way to learn key signatures?: Learn the order of sharps (F C G D A E B) and flats (B E A D G C F), then the two shortcuts: last sharp up a letter, and second-to-last flat. Then practice until you name each key without counting.
How do I know if a key signature is major or minor?: The signature alone fits both a major key and its relative minor. Look at the music: minor keys usually raise their 7th note, and pieces tend to start and end on the tonic chord.
Is this key signature practice free?: Yes, with no account. The course adds the interactive circle of fifths, graded quizzes and timed sprints in the practice arena.

Members get · Practice arena

Race Melo in Key Signatures

60-second sprints against Melo at the level you pick, or against your own best run.

See where you rank. Your Theory Tempo climbs from Grave to Prestissimo as you get faster, and every sprint shows how you compare with other players.

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In the course: Lesson 9: Key Signatures (free), Lesson 10: Key Signatures Revisited, Lesson 12: Minor Scales