An online metronome in 6/8 time plays six evenly spaced beats per measure, with beat 1 marked by a higher-pitched click so you can hear the start of each bar. The Online Metronome tool covers this exact use case: pick six as your beats per measure, choose any whole tempo from 30 to 240 BPM, and start playback. Every bar begins with a 1320 Hz click while beats two through six use an 880 Hz click, giving you the audible boundary you need to lock into a compound duple feel. Because the tool runs entirely in your browser through the Web Audio API, there is nothing to install and no audio leaves your device. This makes it a practical choice for 6/8 practice across jigs, barcarolles, sicilianas, slow blues, and many classical themes built on compound meter.
What 6/8 Time Demands From a Metronome
Six eighth notes grouped as two dotted-quarter beats define 6/8. Most listeners hear 6/8 as "ONE two three FOUR five six" rather than as six identical pulses, which is why a strong downbeat accent matters so much more in compound meter than in simple 4/4. Without that first-beat click standing out, beginners can lose the bar line and start placing their long notes on the wrong syllable.
A second accent on beat 4 is common in published sheet music and some practice aids, but it is optional. The Online Metronome only accents beat 1, so it is best suited to musicians who want a clean pulse and a clear bar boundary rather than a fully subdivided compound click. If your piece needs extra emphasis on beat 4, the easiest workaround is to think of 6/8 as two back-to-back bars of 3/8 — counting "ONE two three" as one bar and "FOUR five six" as the next — and tap your own secondary accent with your foot or a damped string.
Configure Six Beats in the Online Metronome
Setting up the tool for 6/8 takes a few inputs once you understand the controls.
- Open the Online Metronome page in your current browser tab.
- Type a whole-number tempo from 30 through 240 BPM in the tempo field.
- Type 6 in the beats-per-measure field to match a 6/8 bar.
- Select Start. The first click plays immediately at 1320 Hz, then beats 2 through 6 follow at 880 Hz.
- Listen for the higher first-beat accent at the start of each bar and use it to anchor your downbeats.
- Select Stop before closing or refreshing the page so the audio context closes cleanly and no stale playback continues.
Tempo Math: How the Click Interval Works
The metronome schedules each click from the formula 60 ÷ BPM seconds, which follows directly from the definition of beats per minute. At 60 BPM the interval is one full second; at 120 BPM it shrinks to 0.5 seconds; at 240 BPM it drops to 0.25 seconds, the fastest the tool can go. For 6/8 practice, that arithmetic gives you the speed of every individual eighth as well as the length of a complete six-beat bar.
Worked example at 80 BPM with 6 beats per measure:
Interval per beat = 60 ÷ 80 = 0.75 seconds. Length of one full 6/8 bar = 0.75 × 6 = 4.5 seconds.
At 80 BPM you will hear six clicks spread across 4.5 seconds, then a brief silence, then the next six clicks. That bar length is also the practical reference for working out how long it takes to perform a 16-bar tune: 16 × 4.5 = 72 seconds for the whole piece at this tempo.
Because the tool validates tempo as a whole number between 30 and 240, decimals such as 79.5 are rejected rather than rounded. If you need an exact dotted-quarter tempo of, say, 76 BPM, enter 76 directly. The browser then schedules each next tick from that validated value, and any edit to the tempo or measure field stops playback first so the visible tempo and the audible click rate never drift apart.
6/8 vs Other Common Meters
The Online Metronome handles 6/8 the same way it handles any other measure: you tell it how many beats to count before the higher-pitched downbeat returns. The table below shows the value to enter for several common meters and the feel each produces.
| Time signature | Beats per measure (enter this) | Beat unit | Feel |
|---|---|---|---|
| 2/4 | 2 | Quarter | Simple duple, march-like |
| 3/4 | 3 | Quarter | Simple triple, waltz feel |
| 4/4 | 4 | Quarter | Simple quadruple, common time |
| 6/8 | 6 | Eighth | Compound duple, jig feel |
| 9/8 | 9 | Eighth | Compound triple |
| 12/8 | 12 | Eighth | Compound quadruple, slow blues feel |
Notice that 6/8 sits next to 3/4 in the table, and the two meters are easy to confuse. Both contain six unit pulses, but 6/8 groups them as 3+3 while 3/4 groups them as 2+2+2. If you are practising a piece marked 6/8, entering 6 in the Online Metronome gives you the correct six-pulse bar. If your piece is in 3/4, enter 3 instead and treat each beat as a quarter note. A full guide to waltz practice at 3/4 lives in our companion Online Metronome 3/4 walkthrough.
Practice Tips and Browser Accuracy Notes
The metronome is a lightweight practice pulse, not a sample-accurate studio clock. Browser scheduling can introduce small delays when the tab is in the background, when power-saving mode kicks in, or when Bluetooth headphones add their own latency. For ordinary scale work, sight-reading, and rough tempo checks these timing wobbles are imperceptible; for DAW-aligned recording or MIDI-clock use they are not appropriate.
A few habits make the tool behave well in 6/8 practice:
- Start your device volume low, especially with headphones, then raise it once you have confirmed the downbeat accent is audible.
- Keep the metronome tab in the foreground while you practise. Background tabs throttle timer callbacks and can stretch the click interval.
- Use a tempo on the slower side of your target range when you are new to compound feel. A jig at 60 BPM gives you a full second between eighths, which is comfortable for counting aloud.
- Stop playback before you close or refresh the tab so the AudioContext closes cleanly. The Stop control resets the beat counter and clears the scheduled timeout.
- Remember the metronome never records, never uploads, and never asks for microphone access. Every click is generated locally by short oscillator nodes that fade out within roughly 60 milliseconds, as documented for the OscillatorNode interface on MDN.
If Web Audio fails to start — for example on a locked-down browser or before any user gesture — the tool shows an error and does not leave a stale "playing" indicator behind. Refreshing the page and clicking Start again is usually enough to recover, and you will get the same six-beat 6/8 pulse as soon as playback resumes.