Note to MIDI Number Converter
Note to MIDI Number Converter
Convert a MIDI note number to its note name and frequency, or enter a frequency to get the nearest note, MIDI number and how many cents off it is.
MIDI numbers, note names and frequency
Every key maps to a MIDI number from 0 to 127. A4 is MIDI 69 at 440 Hz, and middle C is MIDI 60. This converter links all three so you can program hardware, write SysEx, or check tuning.
How to use it
Type a MIDI number to see the note and frequency, or type a frequency to find the nearest note and how many cents sharp or flat it is.
FAQ
What MIDI number is middle C?
Middle C is MIDI note 60, written C4 in this scientific octave naming.
What is A4 in MIDI?
A4 is MIDI 69 at 440 Hz, the standard tuning reference.
Why show cents?
When you enter a raw frequency it is rarely exactly in tune. Cents tell you how far it is from the nearest note.
Is it free?
Yes, free forever.
Want instruments that play in tune?
This converter is free. The MIDI packs and instruments on Meshplugins.com are ready to drop in. Pro studio results, bedroom-friendly.
Real sauce. No fluff.Free forever · No sign-up · Runs in your browser
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