Calculators
Interactive tools for the numbers you work out constantly — tempo-synced delay times, note/frequency conversions, and audio latency. Everything runs in your browser; nothing is sent anywhere.
- Scale FinderPick a root and scale to get its notes, step formula, intervals and MIDI numbers — modes, minor, pentatonic, blues and more.
- Chord FinderChoose a root and chord type to see its notes, symbol, scale degrees and intervals — from triads to 13ths.
- Chord IdentifierClick the notes you're playing and it names the chord — inversions included. The reverse of the chord finder.
- Chord Progression GeneratorGet the actual chords for classic progressions (I–V–vi–IV, ii–V–I…) in any key, with each chord's notes.
- Online MetronomeA precise, tap-tempo metronome with accented downbeats and adjustable time signature — right in your browser.
- Tap Tempo (BPM Tapper)Tap the button or spacebar in time with any track to find its BPM, averaged for a stable reading.
- Interactive Circle of FifthsClick any key to see its notes, key signature and relative minor — the songwriter's map of key relationships.
- Interval CalculatorFind the interval between two notes, or transpose a note by a set number of semitones.
- Euclidean Rhythm GeneratorSpread k onsets evenly over n steps — the Bjorklund patterns behind great beats, ready for Tidal or Strudel.
- BPM to Delay Time CalculatorType a tempo (or tap it) and get delay, reverb and LFO times in ms and Hz for every note division.
- Note / Frequency / MIDI ConverterConvert between note names, MIDI numbers and frequencies — with adjustable tuning and cents readout.
- Polyrhythm CalculatorSee how two cross-rhythms line up — the combined grid and millisecond timing of any x-against-y at a given tempo.
- Decibel ↔ Gain ConverterConvert between decibels and the linear amplitude factor you apply in code, with percent.
- Sample Rate & Buffer Size Latency CalculatorSee the latency each buffer size adds at your sample rate, in milliseconds and samples.
- Audio File Size CalculatorEstimate uncompressed audio size from sample rate, bit depth, channels and length — and the data rate.