BPM to MS Calculator — Delay & Reverb Times

How do I convert tempo to ms?

A quarter note lasts 60,000 ÷ BPM milliseconds when BPM counts quarter notes. Divide that result by two for eighth notes or by four for sixteenth notes. In reverse, 60,000 ÷ quarter-note milliseconds gives BPM: a 500 ms quarter note corresponds to 120 BPM.

What changes at 90 BPM?

At 90 BPM, a quarter-note delay is 60,000 ÷ 90 = 666.7 ms. An eighth note lasts 333.3 ms, and a dotted eighth lasts 500 ms. Values in the display are rounded; the calculator uses the unrounded duration to derive each note value.

How do I convert bars to seconds?

Use seconds = bars × beats per bar × 60 ÷ BPM. At 120 BPM in 4/4, one bar lasts two seconds and eight bars last 16 seconds. This describes the arrangement length, not the time needed for delay feedback or a reverb tail to fade away.

How should I set delay and reverb by ear?

Choose a note duration that supports the rhythm, then adjust feedback and wet/dry level while listening to the full mix. Pre-delay can separate the initial sound from reverberation, but room character and note density affect the result. Musical timing is a useful starting point, not a guarantee of a clear mix.

How do I convert BPM to milliseconds?

For quarter-note BPM, divide 60,000 by the tempo to get one quarter note in milliseconds. At 120 BPM, that is 500 ms. Multiply or divide that duration for other note values. This gives a rhythmic starting point for delay timing; feedback and wet/dry balance remain separate settings.

What is a dotted-eighth delay?

A dotted eighth note lasts one and a half eighth notes, or three quarters of a quarter-note beat. At 120 BPM, an eighth note is 250 ms, so a dotted eighth is 375 ms. Set this value on an unsynced delay, then adjust feedback and level by listening.

How do triplet delay times work?

A triplet note lasts two thirds of the corresponding straight note value. At 120 BPM, a straight eighth is 250 ms and an eighth-note triplet is about 166.7 ms. Three eighth-note triplets fit into one quarter-note beat. Do not confuse an eighth-note triplet with a quarter-note triplet.

Can I use these values for reverb and bars?

Yes, as timing references. Reverb pre-delay and decay values are starting points rather than guarantees of a clear mix. For arrangement timing, one 4/4 bar at 120 BPM lasts two seconds. Multiply beats per bar by 60 ÷ BPM, then multiply by bars for the complete section.