D4293.665 Hz

D4 (D4) is 293.665 Hz in standard equal temperament at A=440 Hz. It is MIDI note number 62.

D4 Frequency in All Tuning Systems

Temperament Frequency (Hz) Cents from Equal Common Usage
Equal Temperament 293.665 Hz 0.00 Modern standard; piano, fretted instruments
Pythagorean 293.332 Hz -1.96 Medieval/early music; string ensemble open fifths
Just Intonation (Major) 294.329 Hz +3.91 A cappella vocal, barbershop, Renaissance
Just Intonation (Minor) 294.329 Hz +3.91 Minor-key vocal music, string ensembles
Quarter-Comma Meantone 294.245 Hz +3.42 Renaissance keyboard, early Baroque organ
Third-Comma Meantone 294.550 Hz +5.21 Renaissance vocal music in minor keys
Sixth-Comma Meantone 293.997 Hz +1.96 Baroque orchestral ensemble compromise
Werckmeister III 294.329 Hz +3.91 Baroque keyboard; Bach contemporaries
Werckmeister IV 294.329 Hz +3.91 Baroque keyboard, strong key contrast
Werckmeister V 294.994 Hz +7.82 Specialized Baroque keyboard
Kirnberger III 294.245 Hz +3.42 Classical-era keyboard, keys near C major
Vallotti 293.997 Hz +1.96 Baroque/Classical orchestral tuning
Young (1799) 293.997 Hz +1.96 Classical-era keyboard
Bach/Lehman 293.997 Hz +1.96 Bach keyboard works, Well-Tempered Clavier
Neidhardt 293.997 Hz +1.96 18th century keyboard, near-equal alternative
Kellner (Bach) 294.196 Hz +3.13 Bach keyboard reconstruction

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

D4 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) 293.665 Hz US, UK, and most modern ensembles worldwide
A = 442 Hz 295.000 Hz Many European orchestras; France, Germany
A = 443 Hz 295.667 Hz Berlin Philharmonic; some US orchestras
A = 432 Hz 288.325 Hz Alternative tuning; Baroque revival
A = 415 Hz (Baroque) 276.979 Hz Historically-informed Baroque performance

f = f_at_A440 × (concert_pitch / 440)

Instruments That Play D4

D4 (293.665 Hz) falls within the comfortable playing range of 53 instruments.

D4 Across All Tuning Systems

Explore how D4 is tuned in each historical temperament system. Each tuning system gives D4 a slightly different frequency, affecting the harmonic character of chords and melodies.

Tune D4 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.