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How trumpet fingerings work
A trumpet has three valves. Valve one lowers the pitch by a whole step, valve two by a half step, and valve three by one and a half steps. Pressing valves in combination lowers the pitch further, which gives every chromatic note in the range. But valves alone do not choose the note: the same open fingering produces low C, middle G, and high C, because your lips and air select which harmonic of the tube sounds. Fingering charts tell you the valve part. Your embouchure does the rest, which is why trumpet takes patient daily practice.
How to use the chart
Pick a written note for a Bb trumpet. The tool shows which valves to press, which fingers press them, and the concert pitch, which is what a piano hears. The full chart below lists every note from low F sharp to high C, with the selected note highlighted. Learn the chart in register groups: low register from F sharp to B, middle register from C to B, and high C on its own. Practise each group as a scale before you mix them, because the same valve pattern repeats in each octave with a different embouchure.
Written pitch versus concert pitch
Trumpet music is written for a Bb trumpet, which sounds a whole step below its written note. Written C sounds as concert Bb, written G sounds as concert F, and written D sounds as concert C. This matters whenever you play with piano, guitar, or a concert-pitch instrument: if the band plays in concert Bb, your written part is in C. The tool shows both pitches for every note, so you can translate in either direction. Bands that mix transposing and non-transposing instruments depend on this translation being automatic, so practise it until it feels obvious.
The low register
The lowest standard note is F sharp below the staff, played with all three valves. Then G uses valves one and three, A flat uses two and three, A uses one and two, Bb uses one, and B uses two. These low notes need relaxed air and a loose embouchure: forcing them with mouthpiece pressure makes them stuffy and flat. Low C sharp and D tend to run sharp on many trumpets, so players extend the third valve slide slightly for those notes. Listen against a tuner and adjust by ear, because no single slide position suits every horn.
The middle register and high C
The middle register runs from middle C, open, up to B, valve two. Its fingerings mirror the low register one octave up, except for two notes: F sharp in the middle of the staff uses valve two alone, not all three valves, and high C is open. That F sharp difference catches out many beginners, so learn it as a special case. High C, open, is the top of the standard beginner and intermediate chart and the gateway to the upper register. It needs fast, focused air and a firm but not forced embouchure: think of aiming the air, not squeezing the lips.
Practice advice
Practise fingerings away from the trumpet too: say the note, then say its valves, until the pairs are automatic. On the instrument, play slow scales with a tuner, holding each note long enough to hear whether it is centred. Keep fingertips close to the valve buttons and press fully: a half-pressed valve gives a fuzzy, out-of-tune note. Alternate fingerings exist for better tuning or easier passages, but learn the standard fingerings in this chart first. They are the fingerings teachers, band directors, and audition panels expect, and alternates only help once the standards are secure.