G4 — 391.995 Hz

G4 (G4) is 391.995 Hz in standard equal temperament at A=440 Hz. It is MIDI note number 67.

G4 Frequency in All Tuning Systems

Temperament Frequency (Hz) Cents from Equal Common Usage
Equal Temperament 391.995 Hz 0.00 Modern standard; piano, fretted instruments
Pythagorean Tuning 391.111 Hz -3.91 Medieval/early music; string ensemble open fifths
Just / Pure 392.438 Hz +1.96 A cappella vocal, barbershop, Renaissance
Meantone 1/3 Comma 394.216 Hz +9.78 Renaissance vocal music in minor keys
Meantone 1/4 Comma 393.550 Hz +6.85 Renaissance keyboard, early Baroque organ
1/6 SC - Attenuated 393.104 Hz +4.89 Baroque orchestral ensemble compromise
Kellner's Bach 393.415 Hz +6.26 Bach keyboard reconstruction
Kirnberger III 393.550 Hz +6.85 Classical-era keyboard, keys near C major
Vallotti 392.882 Hz +3.91 Baroque/Classical orchestral tuning
Werckmeister III 393.770 Hz +7.82 Baroque keyboard; Bach contemporaries
Werckmeister IV 392.439 Hz +1.96 Baroque keyboard, strong key contrast
Werckmeister V 393.770 Hz +7.82 Specialized Baroque keyboard

Positive cents = sharper than equal temperament. Negative cents = flatter. 100 cents = 1 semitone.

G4 at Different Concert Pitches

The same note varies in frequency depending on the concert pitch standard used by your ensemble.

Concert Pitch Frequency (Hz) Common Usage
A = 440 Hz (ISO standard) 391.995 Hz US, UK, and most modern ensembles worldwide
A = 442 Hz 393.777 Hz Many European orchestras; France, Germany
A = 443 Hz 394.668 Hz Berlin Philharmonic; some US orchestras
A = 432 Hz 384.868 Hz Alternative tuning; Baroque revival
A = 415 Hz (Baroque) 369.723 Hz Historically-informed Baroque performance

f = f_at_A440 × (concert_pitch / 440)

Instruments That Play G4

G4 (391.995 Hz) falls within the comfortable playing range of 49 instruments.

Acoustic Guitar Alto (Contralto) Alto Flute Alto Saxophone Banjo (5-string) Banjo (Tenor, 4-string) Baritone Bass Clarinet Bass Flute Bass Guitar (4-string) Bass Trombone Bassoon Cello Chimes (Tubular Bells) Clarinet in A Clarinet in Bb Classical Guitar Cornet Double Bass Electric Bass (5-string) Electric Guitar English Horn Euphonium Flugelhorn Flute French Horn in F Harp (Pedal) Mandolin Marimba Mezzo-Soprano Oboe Oboe d'Amore Recorder (Alto) Recorder (Bass) Recorder (Tenor) Soprano Soprano Saxophone Tenor Timpani Trombone (Tenor) Trumpet in Bb Trumpet in C Ukulele (Baritone) Ukulele (Concert) Ukulele (Soprano) Ukulele (Tenor) Vibraphone Viola Violin

G4 Across All Tuning Systems

Explore how G4 is tuned in each historical temperament system. Each tuning system gives G4 a slightly different frequency, affecting the harmonic character of chords and melodies.

Equal Temperament Pythagorean Tuning Just / Pure Pythagorean Just Perfect 5ths Meantone 1/3 Comma Meantone 1/4 Comma 1/6 SC - Attenuated Almost-equal Barnes' Bach Kellner's Bach Kirnberger III Shifted Vallotti/Young's Well Vallotti Werckmeister III Werckmeister IV Werckmeister V Rousseau II

G4 in Historical Temperament Systems

Explore how G4 (391.995 Hz in equal temperament) is tuned in each of the 15 historical non-equal temperament systems. Each system places G4 at a slightly different frequency based on its mathematical basis.

Pythagorean Tuning Just / Pure Meantone 1/3 Comma Meantone 1/4 Comma 1/6 SC - Attenuated Kellner's Bach Kirnberger III Vallotti Werckmeister III Werckmeister IV Werckmeister V

Tune G4 with precision — Get Tunable.

Tunable supports 15+ tuning systems including equal temperament, Pythagorean, just intonation, and historical well-temperaments. See exact Hz values in real-time as you play.

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