Vocal Range Calculator (voice type from your lowest and highest notes)

Understanding the vocal range calculator — concept and principle

This calculator compares the lowest and highest notes you can sing comfortably with the six classical voice ranges and tells you which voice type fits best. It also shows your range in semitones and octaves and the frequency of each note. Use it as a first guide when joining a choir or choosing songs in a comfortable key.

How it is calculated

Each note becomes a number: semitone = 12 × (octave + 1) + note step + accidental, with middle C = C4 = 60 and A4 = 69.

Frequency (Hz) = 440 × 2^((semitone − 69) ÷ 12)

Range = highest − lowest semitone; octaves = range ÷ 12

• Voice ranges: soprano C4–A5, mezzo-soprano A3–F5, alto F3–D5, tenor B2–G4, baritone G2–E4, bass E2–C4.
• For each type the calculator counts how many semitones of your range fall inside it and picks the largest overlap. A tie goes to the type whose centre is closest to the centre of your range.

The principle

Equal temperament divides the octave into 12 equal semitone steps, and each octave doubles the frequency. That is why a note's frequency is 440 Hz (the A above middle C) multiplied by 2 to the power of the semitone distance ÷ 12. Voice types describe where a voice sits, and overlap is a simple way to compare your notes with each type's typical span. The ranges come from a standard music dictionary and describe trained classical voices.

Worked example

Default inputs: lowest A2, highest F4.

1. A2 = 12 × 3 + 9 = 45; F4 = 12 × 5 + 5 = 65.
2. Range = 65 − 45 = 20 semitones = 20 ÷ 12 = 1.7 octaves.
3. Frequencies: A2 = 440 × 2^(−24/12) = 110 Hz; F4 = 440 × 2^(−4/12) = 349.2 Hz.
4. Overlaps: baritone G2–E4 (43–64) covers 45–64 = 19 semitones; tenor B2–G4 (47–67) covers 47–65 = 18; bass covers 15.
5. Closest type: Baritone (typical range G2–E4); second closest: Tenor.

How to read the result

A close second place means your voice sits between two types; many untrained singers do. Range is only part of the picture. Voice teachers also listen to where your voice sounds best and feels easiest (tessitura), its weight and colour, and where register changes happen. Untrained ranges often grow with practice. For choosing songs, the more useful number is the span where you sing comfortably, not the extreme notes.

Common mistakes

• Entering notes you can only reach with strain.
• Confusing octave numbers: middle C is C4.
• Treating the result as a fixed label.
• Testing your range when tired or without warming up.

Frequently asked questions

Can my voice type change?

Yes. Ranges often widen with training, and voices change during puberty and with age, so the result can shift over time.

What frequency is middle C?

About 261.6 Hz with A4 = 440 Hz.

What do the octave numbers mean?

This is scientific pitch notation: middle C is C4, and the A above it is A4 = 440 Hz.

Sources: Yale University Library, "Vocal Ranges" (after The New Harvard Dictionary of Music) · ISO 16:1975, Acoustics — Standard tuning frequency (A4 = 440 Hz)