B3 at every common reference pitch
A note’s frequency depends on what A4 is tuned to. The standard is 440 Hz; the other three are the ones you are most likely to meet. The cents column is how far each one sits from the 440 version — the same for every note, because changing the reference moves the whole scale together.
| Reference | B3 | vs 440 |
|---|---|---|
| A4 = 415 Hz · Baroque pitch | 232.91 Hz | −101.3¢ |
| A4 = 432 Hz · “Verdi” pitch | 242.45 Hz | −31.8¢ |
| A4 = 440 Hz · Standard (ISO 16) | 246.94 Hz | — |
| A4 = 442 Hz · Orchestral | 248.06 Hz | +7.9¢ |
One cycle of B3 lasts 4.050 ms, and its wavelength in air at 20 °C is 1.39 m. Hold it as a steady tone in the tone generator.
B3 on the piano
B3 is key 39 of 88, counting from the bottom — a white key. Press any key below to compare it with its neighbours.
B3 on the guitar
In standard tuning B3 is played in 5 places: 6th (low E) string, fret 19, 5th (A) string, fret 14, 4th (D) string, fret 9, 3rd (G) string, fret 4 and 2nd (B) string open. The same pitch in each place, with a different tone: lower strings sound warmer. Guitar music is written an octave higher than it sounds, so on a guitar part this note is printed as B4.
B3 on the staff
Instruments that can play B3
42 instruments play B3 within the normal range, and 4 reach it only at the extreme of theirs. Each links to its range chart; for a transposing instrument, the note on its part is shown.
Guitars and basses
Plucked and struck strings
Woodwind
Brass
Only at the extreme of their range
Voices: B3 is inside the typical range of the bass, baritone, tenor, alto and mezzo-soprano. Test your own range.
The harmonics of B3
A played B3 is not one frequency. A string or a pipe also sounds whole-number multiples of it, and the mix of those harmonics is the instrument’s tone. Here is where the first eight land — and why the 7th sounds out of tune against a piano.
| Harmonic | Frequency | Nearest note | Off by |
|---|---|---|---|
| 1 (fundamental) | 246.94 Hz | B3 | 0¢ |
| 2 | 493.88 Hz | B4 | 0¢ |
| 3 | 740.82 Hz | F♯5 | +2.0¢ |
| 4 | 987.77 Hz | B5 | 0¢ |
| 5 | 1234.7 Hz | E♭6 | −13.7¢ |
| 6 | 1481.6 Hz | F♯6 | +2.0¢ |
| 7 | 1728.6 Hz | A6 | −31.2¢ |
| 8 | 1975.5 Hz | B6 | 0¢ |
Frequencies that land on B3
Frequently asked questions
What is the frequency of B3?
B3 is 246.94 Hz in equal temperament with A4 tuned to 440 Hz, the international standard. At A4 = 432 Hz it is 242.45 Hz, and at the orchestral A4 = 442 Hz it is 248.06 Hz.
Which octave is B3 in?
The number is the octave in scientific pitch notation, where each octave starts on C and C4 is middle C. B3 is in octave 3, 1 semitones below middle C. In Helmholtz notation, used in older books, it is written b.
How do I play B3 on a piano?
B3 is key 39 of 88, counting from the bottom — a white key.
Which instruments can play B3?
42 of the instruments we chart play B3 within their normal range, including violin, viola, cello, guitar, 7-string guitar, and 4 more reach it only at the extreme of their range.
Typing it? B3 is also written B3. Convert any frequency on the Hz-to-note converter.