Free BPM to MS Converter
Convert BPM to milliseconds for delay, reverb, and time-based effects.
What is a bpm to ms converter?
A bpm to ms converter is a free online tool that helps you instantly calculate bpm to ms converter results without any signup or software installation. It runs entirely in your browser — no signup, no app, and no data is ever sent to a server.
A BPM to ms converter is essential for music producers setting delay times, reverb pre-delay, and LFO rates in their DAW. The most common setting is the dotted eighth delay — at 120 BPM that's 375ms, the classic slapback and ping-pong delay timing used across countless sessions. Knowing the exact ms values for each note division means your effects stay locked to the tempo without guesswork.
How it works
The converter divides 60,000 (the number of milliseconds in a minute) by the BPM to get the quarter note duration. Other divisions are derived: eighth = quarter ÷ 2, dotted eighth = quarter × 0.75, sixteenth = quarter ÷ 4, triplet = quarter ÷ 3, dotted quarter = quarter × 1.5. The reverse converter divides 60,000 by any ms value to find the matching BPM.
When to use a BPM to ms converter
Any time you're setting a delay, reverb, modulation, or time-based effect and want it tempo-synced. Live sound engineers use it to set delay times for different songs. DJs use it to pre-set effects for their set. Music producers use it constantly when mixing — a dotted eighth delay at exactly the right ms creates a rhythmic effect that sounds intentional, not random.
Common mistakes with BPM to ms conversion
The most common mistake I see producers make is confusing dotted eighth with regular eighth note delay values. A dotted eighth is the quarter note value multiplied by 0.75, not the eighth note divided by something. At 120 BPM: quarter = 500ms, eighth = 250ms, dotted eighth = 375ms. The dotted eighth is the most popular delay setting because it creates a syncopated pulse that sits well in the groove, but plenty of producers enter the wrong value and wonder why their delay sounds off.
Another frequent error is forgetting that delay time and reverb pre-delay serve different purposes even though both use ms values. Pre-delay is typically set to 20-50ms to separate the dry signal from the reverb tail, not to match a note division. I see beginners setting reverb pre-delay to a full eighth note value (250ms at 120 BPM), which creates a noticeable gap between the source and the reverb — it sounds like two separate events rather than spatial depth.
I also find that DJs and live sound engineers often round ms values incorrectly when working without a converter. The exact value for a quarter note at 128 BPM is 468.75ms. Rounding to 469ms is fine, but rounding to 470ms introduces a tiny drift that becomes noticeable over multiple repeats. The converter gives you exact values to three decimal places so your effects stay locked to the grid across the entire performance.
How to use this calculator
- Enter the BPM — Type the tempo of your track in beats per minute.
- View note divisions — See the ms values for quarter, eighth, dotted eighth, sixteenth, and triplet note divisions.
- Use in your DAW — Set your delay, reverb pre-delay, or LFO rate to the matching ms value.
Frequently asked questions
How do I convert BPM to milliseconds for delay?
Divide 60,000 by the BPM to get the quarter note duration in ms. For a dotted eighth, multiply by 0.75. For a triplet, divide by 3. At 120 BPM: quarter note = 500ms, eighth note = 250ms, dotted eighth = 375ms, sixteenth = 125ms, triplet = 166.7ms.
What is the standard delay time for 120 BPM?
At 120 BPM, a quarter note delay is 500ms, an eighth note is 250ms, and a dotted eighth (the most popular delay setting) is 375ms. Most producers use dotted eighth or eighth note delays for synced effects. The calculator shows all common divisions so you can pick the right one.
How many ms is a 16th note at 140 BPM?
At 140 BPM: quarter note = 60,000 ÷ 140 = 428.6ms. Sixteenth note = 428.6 ÷ 4 = 107.1ms. The calculator handles all note divisions — quarter, dotted quarter, eighth, dotted eighth, triplet, and sixteenth — so you can dial in any delay or reverb pre-delay.
What BPM is each delay time in ms?
To find the BPM from a delay time: 60,000 ÷ ms = BPM. A 500ms delay = 120 BPM. A 375ms dotted eighth = 160 BPM (though it's typically used at 120 BPM as a dotted-eighth subdivision). The reverse converter lets you input any ms value and find the matching BPM.
What is the difference between Hz and ms in audio effects?
Hz (frequency) and ms (time) are reciprocals: Hz = 1000 ÷ ms, and ms = 1000 ÷ Hz. A 2 Hz LFO rate equals 500ms cycle time. Low-frequency oscillators and tremolo effects are often specified in Hz, while delay and reverb use ms. The converter handles both units so you can work in whichever your effect plugin expects.
Should I use note-based delays or manual ms values?
Note-based delays (like dotted eighth or quarter) stay locked to your session tempo and adjust automatically if you change the BPM. Manual ms values stay fixed regardless of tempo changes. I recommend note-based for mix effects that need to stay in time, and manual ms for creative effects where a specific time interval matters more than tempo sync.