Key Signature Finder: Sharps and Flats for Every Major Key
The key signature at the start of a staff changes how you read every note. This finder spells out exactly which notes it changes.
What is the Key Signature Finder?
Key signatures tell you which notes stay sharp or flat through a piece. Pick a major key and this tool lists its sharps or flats in the standard order, so you can read the staff without guessing.
How to use it
- Enter your values in the fields provided.
- Click Find Key Signature.
- Read the result and adjust an input if you want a different outcome.
Worked example
G major has one sharp, F sharp, while E flat major has three flats: B flat, E flat, and A flat.
How many sharps does G major have?
G major has one sharp, F sharp, which is why its key signature shows a single sharp sign on the F line.
Frequently asked questions
What do I enter to get a result?
Fill in every field with your own numbers or choices, then run the tool. Empty number fields count as zero, so check them before you trust the output.
Can I reuse this result elsewhere?
Yes. The result is calculated in your browser from the values you entered, so you can copy the numbers into your own notes or plan.