What is standard bass guitar tuning?

Standard 4-string bass tuning, low to high, is E1 A1 D2 G2 — one octave below a guitar's four lowest strings.

What about 5-string bass?

5-string basses typically add a low B below E (B0), or occasionally a high C above G. The Watar app includes 5 and 6-string presets.

Why is my bass harder to tune than my guitar?

Lower fundamental frequencies have longer wave periods, so pitch detection needs a slightly longer, cleaner sample — let the note sustain and keep background noise low.

Bass Tuner

Free bass guitar tuner for standard 4-string EADG tuning — right in your browser. 5 and 6-string presets are available in the Watar app.

Tune your bass online

Your microphone audio is analyzed live in your browser using the Web Audio API and is never recorded, saved, or sent anywhere — the same on-device-only approach the Watar app itself uses. Requires a secure (https) connection; works in current Chrome, Safari, Firefox, and Edge.

Standard Bass tuning

String	Note	Frequency
4 (lowest, E)	E1	41.20 Hz
3 (A)	A1	55.00 Hz
2 (D)	D2	73.42 Hz
1 (highest, G)	G2	98.00 Hz

● Low frequencies take a moment longer to register — let each note ring for a second or two before reading the display.

● A quiet room matters more on bass; low-end rumble from fans or traffic can confuse pitch detection.

● For 5-string (low B) or 6-string (low B, high C) basses, install the Watar app — the browser tuner here is tuned for standard 4-string EADG.

Frequently asked questions

What is standard bass guitar tuning?: Standard 4-string bass tuning, low to high, is E1 A1 D2 G2 — one octave below a guitar's four lowest strings.
What about 5-string bass?: 5-string basses typically add a low B below E (B0), or occasionally a high C above G. The Watar app includes 5 and 6-string presets.
Why is my bass harder to tune than my guitar?: Lower fundamental frequencies have longer wave periods, so pitch detection needs a slightly longer, cleaner sample — let the note sustain and keep background noise low.

Get the full Watar app

The browser tuner above is free and always will be — no install needed. For practice mode, drone/reference tones, auto string detection, a metronome, and offline use, install the Watar app.

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Tune another instrument

Guitar Oud Violin Ukulele Bass

Playing something else? Watar's app supports 11 instruments and 30+ tuning styles, including a fully custom slot for anything not listed. Set up a custom tuning →