How to Find Your Vocal Range With or without a piano

4. Count the octaves. Write both notes down, for example A2 and E4. Count the semitones between them, where every piano key, white or black, is one step, and divide by 12. A2 to E4 is 19 semitones, about 1.6 octaves. An octave is the same letter one number higher, so A2 to A4 is exactly two. Our average vocal range guide tells you how your number compares.

5. Repeat on different days. Voices change with sleep, time of day and how much you've talked. Test two or three times over a week and keep the range you reach every time, not your single best day. That is your real working range, and it's what to use when you pick songs, keys and choir parts.

• Counting fry or squeaks: only clear, steady notes belong in your range.
• Testing once, tired: a single test late on a long day can be several notes off.
• Forcing the top: if your neck tightens or your chin juts forward, that note does not count yet.
• Matching the wrong octave: men often sing a note an octave below the key they pressed. That is normal; write down the note you sang, not the key you played.

A piano or keyboard makes this easy because every key has a name. Start by finding middle C, written C4: on a full 88-key piano it is the C nearest the middle of the keyboard. Each C going down is C3, C2 and so on; each C going up is C5, C6. The white keys between them run C, D, E, F, G, A, B.

Play a comfortable note and match it on "ah". Then go down one white key at a time, playing each note and singing it back, until you reach the lowest note you can hold steadily. Mark it, go back to the middle and repeat going up. At each end, try the black keys around your last note to pin down the exact semitone.

• Where to start: men can begin around C3, an octave below middle C; women around C4, middle C itself.
• Digital keyboards: check that no transpose or octave-shift setting is on, or every note name will be wrong.
• Keyboard apps: a free piano app on your phone works the same way. Check how it labels middle C, because a few apps call it C3 instead of C4.

You do not need an instrument. The simplest way is a vocal range test that listens to you sing and names each note as you hold it. Our free vocal range test runs in your browser: sing from your lowest comfortable note to your highest, hold each one for about two seconds, and it reports your lowest and highest notes, their frequencies in Hz, your octaves and the closest voice type. Your audio is analyzed on your device and never uploaded.

If you would rather not use a microphone, the test also has a no-mic mode that plays notes for you to sing along with; you pick the lowest and highest ones you can hold comfortably. A voice tuner is another option: sing one note at a time and read its name and Hz live, which is handy for double-checking the edges of your range.

• Chromatic tuner apps: they show note names the same way. Ignore readings that jump around and count only notes that hold steady.
• A quiet room: background music, fans and TV confuse pitch detection. Keep your phone or laptop about an arm's length away.
• Headphones off: let the microphone hear only your voice, not a backing track.

Women: use head voice for the top of your range. Many women stop at the first note where chest voice starts to strain, often around B4 or C5, and decide they are altos. Let the sound get lighter and keep going; a mezzo-soprano or soprano range often appears once head voice is included. At the bottom, a clear note below F3 is uncommon, so don't force it.

Men: at the bottom, stop before your voice turns into a creak; clear notes below E2 are rare. At the top, notice where your voice flips into falsetto. Write down both your highest full-voice note and your highest falsetto note: the first says more about your voice type, and the second adds to your total range.

Teens: if your voice is changing, your range can shift by several notes from one month to the next. Test gently, skip the extremes and retest every few months. The result describes your voice today, not your adult voice.