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Free online tool
Free online bass guitar tuner (E A D G)
Tune a 4-string or 5-string bass in your browser – free, no download, no sign-up. Tap the tuner, allow the microphone and pluck one string at a time.
GuitarLu Tuner · by Lu Jia Hong
Tune it here
👆 Tap the tuner once, choose Allow for the microphone, then pluck a string. The on-screen prompts are in Chinese. Open the full-screen tuner →
Standard bass tuning: E A D G
From the 4th string to the 1st: E, A, D, G. A 5-string bass adds a lower B below the E.
| String | Note · frequency |
|---|---|
| String 4 | E · 41.20 Hz |
| String 3 | A · 55.00 Hz |
| String 2 | D · 73.42 Hz |
| String 1 | G · 98.00 Hz |
| 5-string bass: low string | B · 30.87 Hz |
FAQ
FAQ
What is standard bass guitar tuning?
Four-string bass, 4th string to 1st: E 41.20 Hz, A 55.00 Hz, D 73.42 Hz, G 98.00 Hz. A five-string bass adds a low B (30.87 Hz).
Can I tune a bass with a phone?
Yes. Open this page, tap the tuner, allow the microphone and pluck a string. The tuner shows all twelve notes, so it works for bass, guitar and ukulele.
The needle keeps jumping. What should I do?
Pluck one string at a time, let it ring and keep the others still. Use a quiet spot and bring the phone close to the bass.
Hear Lu Jia-Hong play
GuitarLu Tuner is a free tool made by fingerstyle guitarist Lu Jia-Hong for his own students. Come and hear him play – every video plays right here on the site.