Note Value Calculator: How Long Is Each Note at Your Tempo?
A quarter note is not a fixed length: it stretches and shrinks with tempo. This calculator gives its exact duration at your BPM.
What is the Note Value Calculator?
Rhythm lives in durations, and durations change with tempo. Enter a tempo and a note value and this tool gives the note's length in milliseconds and in beats, so notation turns into timing you can use.
How to use it
- Enter your values in the fields provided.
- Click Calculate Note Length.
- Read the result and adjust an input if you want a different outcome.
Worked example
At 120 BPM a quarter note lasts 500 ms, a half note 1000 ms, and a sixteenth note 125 ms.
How long is a quarter note at 120 BPM?
At 120 BPM one beat lasts 500 ms, and a quarter note is one beat, so it lasts 500 ms.
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.