Play a piano key and see the note and how many cents it is from concert pitch. Use it to check whether your piano needs a tuning.
Free, no sign-up
Any key, any octave
Cents readout
Private, on-device
Reference pitch (A4)
Hz
Lower it in noisy rooms
Concert pitchA4 440 Hz
Press Start tuning, then play or sing a note
Detected note
Concert pitch
Reference octave
Frequency
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Target
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Deviation
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Clarity
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Does your piano need tuning?
Play A4 (the A above middle C) and hold it. If it is more than about 10 cents away from 440 Hz, or if notes across the keyboard don’t agree with each other, it is time to call a piano technician.
Tuning an acoustic piano needs a tuning lever and mutes, and it takes practice, so this tuner is best for checking. Also, pianos are stretch-tuned. The highest notes are tuned slightly sharp and the lowest slightly flat on purpose, so small differences at the very top and bottom are normal.
It tells you whether your piano has moved away from concert pitch and whether some notes don’t agree with others. You can check this before you call a technician.
How to use it
Press Start tuning, play one key at a time and hold it. More than about 10 cents off on A4 usually means the piano needs tuning.
Frequently asked questions
Can I tune a piano with an online tuner?
You can measure every note, but turning the pins needs a tuning lever and a careful technique. Most people use the tuner to check a piano and leave the tuning itself to a technician.
Why are my high notes sharp on the tuner?
Pianos are stretch-tuned so the octaves sound in tune with the strings’ natural overtones. It is normal for high notes to be a few cents sharp and low notes a few cents flat.
Do digital pianos need tuning?
No. Digital pianos play recorded sounds and stay in tune. Many let you change the reference pitch in their settings, though.
