Vocal Range Calculator
- 1 Comfortable low
- 2 Comfortable high
- 3 Your range
Use one clear sound in a quiet room. Your audio stays in this browser.
Warm up gently. Save only notes you can repeat comfortably; stop if singing feels strained.
Reference ranges overlap. These comparisons describe note-range similarity, not a definitive voice classification, probability or assessment of tessitura and tone.
Settings & measurement notes
Microphone input is analyzed in memory; audio is never recorded or uploaded by this plugin. Stopping, hiding or leaving the page releases the microphone. Reference tones temporarily pause analysis.
Pitch estimates can be affected by breathy or irregular sounds, harmonics and microphone processing. This is a single-note tool, not a medical or professional voice assessment.
A4 defaults to 440 Hz. One octave doubles frequency; one semitone is 1/12 of an octave. The detector uses the McLeod pitch method with clarity and stable-note filtering.
Related tools
- Vocal Range Test — Find and record comfortable singing endpoints before choosing a related task.
- Octave Range Test — Understand octave distance, fractional results and endpoint counting.
- Voice Type Test — Interpret illustrative voice-category span comparisons without a definitive label.
Enter your lowest and highest comfortable singing notes to calculate their semitone distance, octave span and reference frequencies. The Vocal Range Calculator is useful when you already know the endpoints and want a consistent numerical result. It also offers microphone capture when you need to check the notes first.
Calculate from known endpoints
- Choose the low note and octave.
- Choose the high note and octave, above the low note.
- Set A4 if you need another reference than 440 Hz.
- Select Show my range.
- Read semitones, octaves, endpoint frequencies and approximate reference comparisons.
The calculation cannot verify that manually chosen notes are comfortable or even that you sang them. Use endpoints you have checked, and preserve that manual origin when saving the result.
Subtract interval steps correctly
Each MIDI-number step represents one equal-tempered semitone. The range distance is high minus low. Divide that number by twelve to express octaves.
For example, F3 is MIDI 53 and C5 is MIDI 72. Their distance is 19 semitones, or approximately 1.5833 octaves. If you count every chromatic note position including both endpoints, you obtain 20 positions, but that is not the interval distance.
Do not count only white keys or only letter names. F to C crosses a different number of semitones depending on the octave and accidentals. A complete note-and-octave input avoids that ambiguity.
Read fractional octaves
An octave is a twelve-semitone interval, not a particular set of letter names. A span of 18 semitones is 1.5 octaves; 30 semitones is 2.5. Fractions are ordinary descriptions of intervals that do not end on an octave-equivalent note.
The Octave Range Test provides a dedicated interpretation of those results. A larger octave number does not automatically describe greater skill or a more useful range for a specific song.
Frequency and reference tuning
The frequency of MIDI note m is A4 × 2 raised to the power (m − 69)/12. A4 is MIDI 69. At the 440 Hz reference, F3 is about 174.614 Hz and C5 about 523.251 Hz.
Changing A4 scales the calculated frequencies proportionally while leaving the selected semitone distance unchanged. It does not retune your physical voice or change an existing audio file. Keep the same reference when comparing numerical frequency records.
A frequency ratio is another way to describe the span: twelve times log₂(high Hz divided by low Hz) gives semitones for compatible measurements. Use the Note Detector to check a clear sounding note when your starting point is audio rather than a known name.
Use microphone mode for endpoint confirmation
The optional microphone workflow captures a comfortable low and then a comfortable high, using a stable-note hold before saving. Work from an easy register and stop before an attempt feels forced.
The Vocal Range Finder focuses on locating those endpoints. A microphone estimate can still follow a harmonic or reject irregular input, so repeat a surprising octave before accepting it.
A captured endpoint is not a complete evaluation of technique. You remain responsible for deciding whether the sound was comfortable and repeatable rather than a brief extreme.
Interpret reference-span matches
The comparison lists illustrative voice ranges, including overlapping categories. Its percentage describes shared interval span relative to the comparison, not a classification probability or a musical-quality score.
Professional voice classification also considers tessitura, transitions and tone. Two people can enter the same low and high notes while finding different repertoire comfortable. The Voice Type Test explains how to use the labels cautiously.
For a practical song decision, inspect the actual melody and where it stays. A piece may fit between your endpoints but repeatedly demand a region that is tiring. The calculator cannot derive that context from two selected notes.
Keep calculation and performance ratings separate
A wider selected span is not automatically a better voice. Entering a very high manual endpoint merely widens the calculation; it does not demonstrate that you can perform the note. Avoid changing inputs solely to obtain a preferred comparison label.
The main Vocal Range Test gives the site’s starting workflow. The Singing Test checks explicit pitch targets, which is a different task from calculating a range.
Save a useful result
Copy and CSV preserve the available notes, distance and frequency information. Keep the reference tuning and whether the values were entered or captured. This calculator page does not create an audio recording or promise automatic result recovery after leaving.
Numerical entry needs no microphone permission. When you choose live capture, the plugin analyzes input in memory rather than recording or uploading it, and Stop or leaving releases the input.
Frequently asked questions
Why is my note count one higher than the semitone result?
You may have counted both endpoints inclusively. Interval distance counts the steps between them.
Does changing A4 change my octave span?
Not for the same selected note numbers. It changes their reference frequencies proportionally.
Can the calculator confirm I sang manually entered notes?
No. Manual calculation describes your selections. Use the microphone workflow to obtain detected endpoints.
Is the closest reference span my final voice type?
No. It is a limited range comparison, not an assessment of every feature used in voice classification.