Bass Tuner
Free online bass guitar tuner for 4, 5 and 6-string basses: standard, drop D, half step down and more, or a custom tuning. Uses your microphone; no download or sign-up.
About this bass tuner
A free online tuner for bass guitar. It listens through your microphone and is built to follow the low notes of a bass, down to a low B on a five-string. Pick the tuning, play a string and follow the needle.
Standard bass tuning
A four-string bass is tuned E, A, D, G from the thickest string to the thinnest. These are the same notes as the bottom four strings of a guitar, one octave lower.
| Tuning | Strings |
|---|---|
| Bass · Standard | E A D G |
| Bass · Half step down | D♯ G♯ C♯ F♯ |
| Bass · Whole step down | D G C F |
| Bass · Drop D | D A D G |
| Bass · Drop C | C G C F |
| Bass · Piccolo (octave up) | E A D G |
| Bass (5-string) · Standard | B E A D G |
| Bass (5-string) · High C | E A D G C |
| Bass (5-string) · Half step down | A♯ D♯ G♯ C♯ F♯ |
| Bass (6-string) · Standard | B E A D G C |
How to tune your bass
- Press “Start tuner” and allow microphone access.
- Play the open E string and let it ring for a second. Low notes take a moment to register.
- Flat means tighten the peg, sharp means loosen it. Green means in tune.
- Continue with A, D and G, then run through them all once more.
Tips for tuning bass
- Pluck evenly and let the note sustain. A short, harsh pluck makes the pitch harder to read.
- Keep the microphone near the speaker or the instrument, and mute the strings you aren’t tuning.
- Heavier strings take longer to settle after you turn the peg, so give each one a moment.
- Tune up to the note rather than down from above for a more stable result.
FAQ
How do I tune a 5-string bass?
Open Settings above the tuner and set the number of strings to 5. Its standard tuning is B0, E1, A1, D2, G2 (lowest to highest); “Custom…” handles anything unlisted.
How do I tune a 6-string bass?
Open Settings above the tuner and set the number of strings to 6 (B0, E1, A1, D2, G2, C3).
What about drop D on bass?
Choose “Custom…” and enter D1, A1, D2, G2.
Does it work with an electric bass?
Yes, with the bass played through an amp near the microphone, or unplugged in a quiet room. The tuner only needs to hear the string.
Also see the guitar tuner, the ukulele tuner and the chromatic tuner.