This singing grader rates your voice from 1 to 10 by measuring your pitch control in one short take. Sing anything, hum or sing a scale for 15 to 30 seconds. You get four sub-scores (pitch centring, steadiness, clear-pitch time and range used) and the sum that makes your grade. It works in your browser, with no download and no sign-up.
Singing Grader
Sing, hum or sing a scale. You get a grade from 1 to 10 made of four measured sub-scores, with the sum shown.
Sing a verse or chorus you know well, with or without words. Hold some notes for half a second or longer.
Press Start and allow microphone access. Sound is analysed in your browser; nothing is recorded or uploaded.
Your singing grade
/ 10
- Pitch centring
- –
- Steadiness
- –
- Clear-pitch time
- –
- Range used
- –
Every held note
| # | Note | Length | Off-centre | Wobble |
|---|
Grades one take of your pitch control. It does not judge talent, tone, style or genre, and it is not a medical or voice diagnosis. Sing gently and stop if anything feels strained.
Related Tools
How the Singing Grader Works
The grader listens through your microphone and finds the pitch of your voice about 30 times a second. Wherever you hold a note for at least 0.4 seconds, it counts a held note and measures it. It then scores four things it can measure reliably:
- Pitch centring (60% of the grade): how close each held note sits to the nearest semitone, measured in cents. 100 cents make one semitone.
- Steadiness (20%): how much the pitch drifts or wobbles while you hold a note, after normal vibrato is smoothed out.
- Clear-pitch time (10%): how much of the time you were making sound had one clear pitch, rather than breath, noise or speech.
- Range used (10%): how far apart your lowest and highest held notes were in this take.
There is no rhythm score. Without a backing track or a known melody there is no beat to compare you with, so a rhythm number would be invented. Tone colour, style and emotion are left out too, because they depend on genre and taste, not on anything a microphone can measure reliably.
How to Use It
- Choose what you will sing: Sing anything (a verse or chorus you know), Hum (a tune on “mm”) or A scale (do-re-mi up and back down, starting on any comfortable note).
- Choose a take length: 15, 20 (the default) or 30 seconds.
- Press Start and sing and allow microphone access. Hold some notes for half a second or longer; quick passing notes are not scored.
- The take ends when the time runs out, or press Finish and grade earlier. Cancel throws the take away.
- Read your grade and sub-scores, open Every held note for the details, then Copy result or Grade again.
For the cleanest result, sing in a quiet room with no music playing, about an arm’s length from your phone or microphone. If you sing along to a track, use headphones so the microphone hears only your voice.
What the Score Means
Your grade is a weighted sum of the four sub-scores, each a whole number from 0 to 10:
Grade = 0.6 × pitch centring + 0.2 × steadiness + 0.1 × clear-pitch time + 0.1 × range used, rounded to the nearest whole number and never below 1.
The result shows this sum with your own numbers, so you can check it. For example, sub-scores of 8, 6, 9 and 5 give 0.6 × 8 + 0.2 × 6 + 0.1 × 9 + 0.1 × 5 = 7.4, a grade of 7. At least three held notes are needed for a grade.
| Sub-score | What is measured | 10 points | 0 points |
|---|---|---|---|
| Pitch centring | Middle pitch of each held note vs the nearest semitone | Within 5 cents | 35 cents or more |
| Steadiness | Spread of the pitch while you hold a note, after 0.2-second smoothing | ±5 cents or less | ±25 cents or more |
| Clear-pitch time | Share of your sounding time with one clear pitch | 80% or more | 30% or less |
| Range used | Lowest to highest held note | 12 semitones (an octave) or more | One note only |
Points fall in a straight line between the two ends. Pitch centring and steadiness are the average across your held notes. Range used ignores a note more than an octave from your middle note, because that is usually a detection slip.
| Grade | What it says about this take |
|---|---|
| 9–10 | Very accurate, steady take: nearly every held note sat right on pitch |
| 7–8 | Solid take: most held notes were close to pitch and fairly steady |
| 5–6 | Mixed take: some held notes were centred, others drifted or wobbled |
| 3–4 | Many held notes sat well away from the nearest note, or wobbled |
| 1–2 | Most held notes were far from pitch or very unsteady; check the microphone and the room |
These bands describe one take, not you as a singer. Read the pitch centring sub-score first. In our tests with synthetic tones, steady notes at random pitches, not aimed at any note, still averaged about 5 for centring and 7 overall, because they were steady, clear and spread across several notes. So a 7 with centring of 5 is not the same as a 7 with centring of 9.
Why Your Key Doesn’t Lower Your Grade
Nothing plays a starting note before you sing, so you pick your own pitch. The grader therefore lines up the semitone grid with your own tuning. If every note you sing is 20 cents above standard tuning (A4 = 440 Hz), your notes are still in tune with each other, and your centring is not reduced. The result shows this offset as your tuning centre, but it is not scored. During the take, the needle shows cents from standard tuning.
Vocal Stability: The Steadiness Score
If you are looking for a vocal stability test, the steadiness sub-score is the measured part of it. For each held note, the grader skips the first 20% of the note, where most singers slide in, and the last 10%. It smooths the pitch over 0.2 seconds and measures how far it strays from its own average, in cents:
- Steady: ±10 cents or less.
- Some wobble: ±10 to ±20 cents.
- Unsteady: more than ±20 cents.
The smoothing removes a regular vibrato of about 5 to 7 cycles a second, so a controlled vibrato is not counted as wobble. In our synthetic tests, a ±50-cent vibrato at 5.5 cycles a second still scored 10. Slow drifts and wobbles of 1 to 3 cycles a second do count. A very wide vibrato, around a semitone either way, can split a note into pieces, so it is measured less reliably. To practise a controlled vibrato, see how to do vibrato.
Steadiness here means pitch steadiness only. It does not measure breath support, volume, strain or vocal health.
What This Tool Doesn’t Measure
It’s worth being clear about what a singing grader can and can’t do. It measures pitch control in one take. It does not measure:
- Talent or potential. The grade describes one take, not how well you could sing with practice.
- Tone, timbre or voice quality. A warm, bright or distinctive voice is not scored, and neither is style or genre.
- Musicality. Phrasing, emotion and interpretation are what many listeners value most, and no number here rates them.
- Rhythm and timing. There is no beat to compare with.
- The right notes of the song. The grader does not know the melody you meant to sing. It checks whether each note sits on a semitone, not whether it was the correct note.
- Health. It is not a medical or voice diagnosis. If singing hurts or your voice changes, see a doctor.
Treat your score as a measurement, not a verdict.
Why Pitch Accuracy Is the Foundation
Pitch carries 60% of the grade because singing off pitch is one of the easiest problems to hear, and it is the part of singing a microphone can measure most exactly. It is also why most voice training starts with ear training and pitch matching: once you land notes reliably, work on breath, dynamics and expression has a stable base.
This grader checks centring without a reference note. To find out whether you can match a note you hear, and whether you tend to sing sharp or flat, take the pitch accuracy test.
How to Improve Your Grade
The result names your lowest sub-score. Start there:
- Pitch centring: warm up first with vocal warm-ups for beginners, then practise matching single notes and let each note settle before you move on.
- Steadiness: take a breath before long notes and keep the airflow even. Practise holding one comfortable note for four seconds.
- Clear-pitch time: sing on open vowels in a quiet room, a little closer to the microphone. Breathy singing and whispering lower it.
- Range used: choose a song or scale that moves across about an octave, inside your comfortable singing range. Do not strain for high notes just to raise it.
Grade again with the same mode and take length, and compare the sub-scores, not just the grade.
Microphone, Accuracy and Privacy
- A standard phone, laptop or USB microphone works. A quiet room matters more than an expensive microphone, because background noise lowers clear-pitch time.
- The detector follows one voice from about 60 to 1,400 Hz (roughly B1 to F6). Music in the room, several voices, or a backing track in the same microphone make the result unreliable.
- What has been tested so far: the pitch detection and scoring were checked with synthetic voice-like tones (in tune, detuned, with vibrato, drifting and noisy) and in desktop Chrome with a simulated microphone. Real singers, phones and other browsers have not been measured yet, so treat a difference of one point between takes as noise.
- The microphone needs a secure (https) page and your permission. It is switched off when the take ends, when you cancel and when you leave the page.
- Sound is analysed in your browser while you sing; the tool does not record, store or upload it. Read the privacy policy and how our tests measure your voice for the wider site.
Frequently Asked Questions
Can you rate my voice from 1 to 10?
Yes. The grader gives a grade from 1 to 10 for one take of 15 to 30 seconds, built from four measured sub-scores, with the sum shown. It rates your pitch control in that take, not how good or pleasant your voice sounds.
How accurate is the singing grader?
On clean synthetic tones from E2 to D6, the pitch detector was within 1 cent. Real voices are less regular than test tones, and accuracy with real singers has not been measured yet. Sub-scores are rounded to whole numbers so they do not suggest more precision than a short take can give.
Do I need a good microphone?
No. A standard phone or laptop microphone works. Background noise affects results more than microphone quality, so a quiet room matters more than expensive equipment.
Why did I get a low score?
Look at the sub-scores. Low pitch centring means notes sat between semitones; low steadiness means held notes drifted or wobbled; low clear-pitch time points to breathy singing, speech or room noise; low range used means the take stayed on a few notes. Music playing or other voices in the room can also confuse the tool. Try again in a quiet room with a song you know well.
Why does my grade change each time?
Every take is different: other notes, more or fewer held notes and small changes in your voice. Takes with few held notes vary most, and the result warns you when fewer than six notes were held. Compare takes with the same mode and length.
Can the tool grade rap or spoken word?
No. It is built for sung or hummed notes. Rap and spoken word have few held notes, so there may be too few to grade, and a grade would not be meaningful.
Is my voice good enough to sing professionally?
A grader score is one data point about one take, not a career prediction. Professional singing also depends on tone, interpretation, stage presence and genre fit, none of which are measured here. For a fuller picture, add feedback from a singing teacher.
Is my voice recorded or uploaded?
No. Sound is analysed in your browser as you sing and is not recorded, stored or uploaded by the tool.
Is the singing grader free?
Yes. It’s fully free, runs in your browser and needs no account or download. There are no usage limits.