Delay Calculator – Convert BPM to Delay (ms) | TapTempoTools
| BPM | Quarter Note | Dotted 8th | 8th Note | Genre |
|---|---|---|---|---|
| 60 | 1000 ms | 750 ms | 500 ms | Slow ballad |
| 80 | 750 ms | 563 ms | 375 ms | Hip-hop |
| 90 | 667 ms | 500 ms | 333 ms | R&B |
| 100 | 600 ms | 450 ms | 300 ms | Pop |
| 110 | 545 ms | 409 ms | 273 ms | Indie rock |
| 120 | 500 ms | 375 ms | 250 ms | Rock / Pop standard |
| 128 | 469 ms | 352 ms | 234 ms | House |
| 138 | 435 ms | 326 ms | 217 ms | Trance |
| 140 | 429 ms | 321 ms | 214 ms | Techno |
| 150 | 400 ms | 300 ms | 200 ms | Hard techno |
| 174 | 345 ms | 259 ms | 172 ms | Drum & bass |
How to Use This Delay Calculator
Enter the BPM of your track into the calculator, and it will instantly convert the tempo into the correct delay time in milliseconds. This helps you set delay effects that stay in sync with the beat, whether you are working with guitar pedals, DAW plugins, or live music setups. Use it to find precise delay values quickly and improve timing, rhythm, and overall sound quality in your music production workflow.
What Is a Delay Calculator and Why Do Musicians Need One?
A delay calculator converts your song’s BPM (beats per minute) into precise millisecond values that you plug directly into delay pedals, reverb plugins, DAW effects, and speaker systems. When your delay time matches the tempo of your music mathematically, every echo lands on a rhythmically meaningful subdivision — a beat, a half-beat, a dotted eighth — instead of falling randomly between notes and creating an unpleasant blur.
The relationship between tempo and time is fixed by physics. At 120 BPM, one beat lasts exactly 500 milliseconds. Every delay time you could ever need — from a whole note (2000 ms) down to a 64th note triplet (10.4 ms) — derives from that single base value. This delay calculator handles the arithmetic instantly so you can focus on making music instead of reaching for a calculator app.
Every musician who works with time-based effects needs these numbers. Guitarists set delay pedals to the dotted eighth note delay to get The Edge’s signature rhythmic echo. Producers set reverb pre-delay to the 32nd note of the project BPM so the reverb tail breathes with the track instead of smearing over the beat. Live sound engineers set speaker delay to compensate for the physical distance between speaker cabinets so the front fills and main stacks arrive at the listener’s ears at the same time. Recording engineers calculate RT60 reverberation time to understand the acoustic behaviour of a recording space before choosing a microphone position.
All of these calculations — guitar delay, speaker delay, reverb pre-delay, LFO rate, RT60 — connect back to the same core formula. Learn it once and you can solve any timing problem in any musical context.
The Delay Calculation Formula Explained
Every delay time calculation starts with the quarter note delay formula:
Quarter note delay (ms) = 60,000 ÷ BPM
At 120 BPM: 60,000 ÷ 120 = 500 ms
At 128 BPM: 60,000 ÷ 128 = 468.75 ms
At 90 BPM: 60,000 ÷ 90 = 666.67 ms
Once you have the quarter note value, every other note subdivision follows by simple multiplication or division. Multiply by 4 for a whole note. Divide by 2 for an eighth note. Multiply by 0.75 for a dotted eighth. Multiply by 0.667 for a quarter note triplet. The calculator above computes all of these simultaneously the moment you enter a BPM or tap along with your music.
Converting BPM to seconds instead of milliseconds follows the same logic — just divide by 1,000. At 120 BPM the quarter note is 0.5 seconds. At 60 BPM, each beat lasts exactly 1 second, which is why 60 BPM gives you a clean “2 beats per second” feel when doubled.
The BPM to Hz conversion works by inverting the delay time: Hz = 1 ÷ (delay time in seconds). At 120 BPM, the quarter note delay is 0.5 seconds, so the corresponding frequency is 1 ÷ 0.5 = 2 Hz. This BPM to Hz calculator value tells you exactly what rate to set a tempo-synced LFO (low frequency oscillator) in your synthesiser or DAW plugin so the modulation locks rhythmically to the song.
The Dotted Eighth Note Delay: The Most Famous Setting in Guitar
The dotted eighth note delay is the single most iconic effect setting in modern guitar playing, and it lives at exactly 75% of the quarter note value.
At 120 BPM: 500 ms × 0.75 = 375 ms
At 128 BPM: 468.75 ms × 0.75 = 351.6 ms
At 100 BPM: 600 ms × 0.75 = 450 ms
The Edge of U2 built his entire sonic identity around this one setting. “Where the Streets Have No Name,” “Pride (In the Name of Love),” and dozens of other U2 recordings use a dotted eighth note delay to turn a single sustained note into a cascading rhythmic figure that fills the entire sonic space. The echo lands on the “and-a” of each beat — between the second and third subdivision of a quarter note — creating a forward momentum that feels simultaneously simple and complex.
David Gilmour of Pink Floyd used the same setting on slower, more atmospheric passages. Andy Summers of The Police applied it across an entire catalogue of reggae-influenced rock. The dotted eighth is so musically useful because it creates implied syncopation without the guitarist actually playing anything syncopated. You play on the beat; the delay does the rhythmic work.
On a Boss DD7 dotted 8th setting or any delay pedal with note subdivision modes, selecting the dotted eighth automatically calculates this value for you once you tap the tempo in. On older or simpler pedals without tap tempo — including many boutique analogue delays — you use the ms value from this delay calculator and dial it in manually on the time knob.
Guitar Delay Calculator: Setting Your Pedal Correctly
Using this guitar delay calculator with a physical pedal takes three steps.
Step 1: Tap the song’s BPM using the tap tempo input at the top of this page. Tap along with the kick drum or main beat four to eight times until the consistency rating shows Excellent or Good.
Step 2: Choose the note subdivision that matches the effect you want. For the classic rhythmic echo, use Dotted 8th. For a clean rhythmic repeat that lands exactly on the beat, use Quarter Note. For a fast slapback feel, use 8th Note. For a lush atmospheric wash, try Half Note or Whole Note.
Step 3: Read the millisecond value from the calculator and set your delay pedal’s time control to match.
Most modern delay pedals — including the Boss DD-200, Strymon Timeline, Eventide TimeFactor, and TC Electronic Flashback — have tap tempo inputs that calculate the quarter note automatically. You then select a note subdivision from the pedal’s menu to shift to dotted eighth, triplets, or other values. For the minority of pedals that only accept a direct millisecond value, this calculator gives you the exact number.
Triplet delays are worth exploring for blues and shuffle contexts. A triplet eighth note at 120 BPM equals 333 ms — the delay creates a “three against two” feel that matches the swung feel of 12-bar blues perfectly. Stevie Ray Vaughan’s cleaner passages often used this setting. At slower tempos in the 70–80 BPM range, the triplet eighth falls between 250 ms and 285 ms, landing in the natural pocket of slow-swung groove.
BPM to MS Calculator for Music Producers
Music producers use delay time calculations across every element of a mix. Unlike guitarists who typically apply one delay at one setting, producers work with multiple delay times simultaneously — different delays on vocals, drums, synths, and buses, each set to a different note subdivision of the same BPM.
Vocal delay throws use 8th note or dotted 8th note delays applied to the last word or syllable of a vocal phrase. The throw echoes once or twice after the phrase ends, filling the space before the next phrase begins. This is standard on almost every pop and R&B production. At 100 BPM the 8th note throw is 300 ms. At 128 BPM it is 234 ms.
Pre-delay on reverb is one of the most effective tools in professional mixing, and calculating it precisely makes a measurable difference to the clarity of a mix. Pre-delay is the gap between the original sound and the beginning of the reverb tail — it simulates the distance between a sound source and the room boundaries. Setting pre-delay to a 32nd note or 64th note value at the track’s BPM means the reverb starts on a rhythmically meaningful subdivision instead of immediately clouding the attack of the sound.
At 120 BPM, the 32nd note is 62.5 ms — ideal pre-delay for a medium hall reverb on snare or vocals. The 64th note is 31.25 ms — better for a shorter room or plate reverb. The key rule: the reverb tail should breathe with the track’s tempo, not fight against it.
Producers also use delay times to set LFO rates in synth patches and DAW automation. The BPM to Hz calculator in this tool gives the direct LFO frequency for every note subdivision. At 120 BPM, a 16th note LFO runs at 8 Hz — fast enough to create a rhythmic tremolo effect rather than a slow modulation sweep. At 4 Hz the LFO completes one cycle per 8th note, creating a tighter groove-locked pulse.
How to Calculate Reverb Pre-Delay
Reverb pre-delay is the most underused tool in home studio mixing and one of the most powerful. It separates the dry signal from the wet signal in a way that maintains clarity and intelligibility even with large reverb amounts.
The delay calculation formula for pre-delay is the same as for echo delay: divide 60,000 by the BPM and multiply by the target note fraction. For a 32nd note pre-delay at 100 BPM: (60,000 ÷ 100) × 0.125 = 75 ms.
Here is how to think about pre-delay by sound source and genre.
Vocals in pop and R&B: set pre-delay to 20–40 ms. This separates the reverb from the voice just enough to maintain intelligibility. Values derived from the 64th note at BPMs between 90 and 140 land in this range precisely.
Snare drum in rock and pop: 30–50 ms works best. The room reverb needs to breathe behind the snare without smearing the next snare hit. At 120 BPM the 32nd note gives 62.5 ms — slightly long but appropriate for a big room sound. Use the 64th note (31.25 ms) for a tighter plate reverb.
Piano and acoustic guitar: 60–100 ms pre-delay gives a natural concert hall separation. These instruments produce complex transients that benefit from more space before the reverb engages.
Reverberation time — measured as RT60, the time for a room’s reverb to decay by 60 dB — is a different but related calculation. RT60 tells you how “live” or “dead” an acoustic space is. Engineers measure RT60 by firing a starter pistol or a test tone delay calculator burst and measuring how long it takes the sound to decay to inaudible levels. A typical untreated bedroom has an RT60 of 0.4–0.8 seconds. A concert hall has an RT60 of 1.5–2.5 seconds. To measure RT60 yourself, record a sharp impulse (a hand clap or balloon pop), find the peak level in your DAW waveform, count forward until the level drops 60 dB, and read the elapsed time. Apps and reverb time calculator software including REW (Room EQ Wizard) automate this with a sweep tone and a measurement microphone.
Speaker Delay Calculator: Time Alignment for Live Sound
Live sound engineers use a speaker delay calculator to align multiple speaker cabinets so that sound from each cabinet reaches the audience’s ears simultaneously. When a main speaker and a delay speaker (or front fill) are separated by physical distance, the closer speaker delivers sound earlier than the farther speaker. Without delay compensation, the listener hears two arrivals of the same sound slightly apart — a comb filtering effect that makes the sound seem harsh, phasey, and unclear.
Sound travels through air at approximately 343 metres per second (1,125 feet per second) at room temperature. This fixed speed gives the delay calculation formula for speakers:
Delay time (ms) = distance (feet) ÷ 1.125
Or in metric units:
Delay time (ms) = distance (metres) ÷ 0.343
A delay speaker positioned 20 metres behind the main system needs approximately 58 ms of delay on the signal feeding it. This delay calculator feet to ms conversion ensures the delayed signal from the rear speakers arrives at the audience position at exactly the same moment as the direct sound from the main system, creating a single coherent wavefront.
Speaker time alignment calculators are built into most modern digital mixing consoles — including the Yamaha CL/QL series, DiGiCo SD range, and Avid Venue. They accept distance in feet or metres and compute the speaker delay unit value automatically. On analogue systems, engineers use a dedicated outboard speaker delay unit or a digital delay processor to insert the compensating delay in the signal chain before the amplifier.
The speaker coverage calculator consideration matters alongside delay — different cabinets cover different areas of the audience, and both delay time and speaker position affect the coverage pattern. A properly time-aligned system with good speaker coverage produces even sound pressure level across the entire venue, not just at the mix position.
Speaker time alignment calculator values need recalculation whenever speaker positions change. Temperature also affects the speed of sound slightly — at 20°C sound travels at 343 m/s, but at 30°C it increases to approximately 349 m/s, which shifts delay compensation values by a small but audible amount in high-accuracy systems.
Tap Tempo and the BPM Calculator Connection
This delay calculator works alongside the tap tempo and BPM calculator tools on TapTempoTools to create a complete tempo workflow. You tap the BPM using the metronome or BPM counter, confirm it with the consistency graph, then read the delay times from this calculator without switching tools or doing any mental arithmetic.
The tempo calculator relationship matters most in these scenarios.
You are setting up a guitar rig for a live show. The setlist has eight songs at different tempos. Rather than calculating delay times for each song manually, you tap each song’s BPM in advance, note the dotted eighth delay value for your delay pedal, and write the values on a setlist card. During the show, between songs, you quickly adjust the delay pedal’s time knob to the correct ms value for the next track.
You are in a recording session and the producer has a reference track they want to match. You tap the reference track into the BPM calculator, get the tempo, then use the delay calculator to find the reverb pre-delay and delay throw values that will work musically with that tempo. Everything sounds cohesive because all the time-based effects share the same rhythmic foundation.
You are mixing and the kick drum sounds slightly late against a programmed loop. You use the BPM time calculator to find the 16th note duration (62.5 ms at 120 BPM) and nudge the kick by that amount to land on the correct grid subdivision.
The bpm to seconds calculator aspect is also useful for automation. When you draw volume automation in a DAW, knowing that one beat lasts 0.5 seconds at 120 BPM lets you draw attack and release curves that align with the music’s pulse rather than arbitrary time values
Sound Delay Calculator for Acoustics and Room Treatment
The sound delay calculator concept extends into acoustic measurement and room treatment. When you clap your hands in an untreated room and hear a flutter echo, you are hearing sound bouncing between parallel walls at a speed determined by the room’s dimensions. The delay time of that flutter echo equals twice the wall distance divided by the speed of sound.
In a room 5 metres wide, sound bounces between the side walls every (2 × 5) ÷ 343 = 0.029 seconds = 29 ms. This creates a comb filtering resonance with a fundamental frequency of 1 ÷ 0.029 = 34.5 Hz and harmonics at multiples of that frequency throughout the audible spectrum. Room treatment — bass traps, broadband absorbers, diffusers — breaks up these reflections to flatten the frequency response and reduce the RT60 to a manageable level.
Engineers who calculate reverb time online or in software use RT60 measurements to determine how much treatment a room needs. A home studio targeting a 0.3–0.4 second RT60 needs heavier treatment than a podcast booth targeting 0.2 seconds. Broadcast vocal booths aim for 0.2–0.25 seconds. A mastering room typically achieves 0.3–0.35 seconds with heavy broadband treatment.
The reverberation time calculator formula developed by Wallace Clement Sabine in 1900 gives a quick theoretical estimate:
RT60 = 0.161 × V ÷ A
Where V is the room volume in cubic metres and A is the total absorption in sabins (a unit measuring how much absorption surface area you have, weighted by absorption coefficient). This formula works reasonably well for rectangular rooms with moderate absorption. In highly treated rooms or irregularly shaped spaces, the Eyring correction gives more accurate results and is what most reverb time calculator apps implement.
Using This Delay Calculator Online Across Different Tools and Platforms
Every major DAW handles tempo-synced delay differently, and understanding your specific tool helps you apply the delay calculator values correctly.
In Ableton Live, every time-based effect in the device chain shows a sync button that locks the delay time to the project tempo. When sync is engaged, you select a note subdivision directly. When sync is off, you enter milliseconds manually — use the values from this calculator. The same system applies in FL Studio’s Delay Bank, Logic Pro’s Tape Delay and Stereo Delay, Pro Tools’ Mod Delay III, and Cubase’s PingPong Delay.
For hardware synthesisers without a DAW connection, the BPM to Hz calculator matters most. Many classic and modern analogue synths — Moog Sub 37, Sequential Prophet-6, Korg Minilogue — have LFO rate controls that accept frequency in Hz rather than note subdivisions. At 120 BPM, a quarter note LFO is 2 Hz, an 8th note is 4 Hz, a 16th note is 8 Hz, a 32nd note is 16 Hz. Enter the correct Hz value and the LFO locks rhythmically to the song even without MIDI clock synchronisation.
The samples to ms calculator conversion comes up in DAW work when you need to nudge audio clips or set delays in sample-based units. At 44.1 kHz sample rate, 1 ms equals 44.1 samples. At 48 kHz, 1 ms equals 48 samples. A 500 ms quarter note delay at 120 BPM equals 22,050 samples at 44.1 kHz, or 24,000 samples at 48 kHz. When your DAW shows delay compensation in samples, divide by the sample rate to get milliseconds, then verify against this calculator.
Delay Time Chart: Every BPM and Note Value You Need
The delay time chart below covers the most commonly used note values at the tempos most relevant to popular music production. All values are in milliseconds, rounded to one decimal place.
For genres where the BPM defines the session tempo — house at 128, techno at 138, trance at 138, drum and bass at 174, hip-hop at 90, R&B at 85 — these values are worth bookmarking.
At 60 BPM:
Quarter note — 1000 ms | Dotted eighth — 750 ms | Eighth — 500 ms | 16th — 250 ms
At 80 BPM:
Quarter note — 750 ms | Dotted eighth — 562.5 ms | Eighth — 375 ms | 16th — 187.5 ms
At 90 BPM:
Quarter note — 666.7 ms | Dotted eighth — 500 ms | Eighth — 333.3 ms | 16th — 166.7 ms
At 100 BPM:
Quarter note — 600 ms | Dotted eighth — 450 ms | Eighth — 300 ms | 16th — 150 ms
At 120 BPM:
Quarter note — 500 ms | Dotted eighth — 375 ms | Eighth — 250 ms | 16th — 125 ms
At 128 BPM:
Quarter note — 468.8 ms | Dotted eighth — 351.6 ms | Eighth — 234.4 ms | 16th — 117.2 ms
At 138 BPM:
Quarter note — 434.8 ms | Dotted eighth — 326.1 ms | Eighth — 217.4 ms | 16th — 108.7 ms
At 140 BPM:
Quarter note — 428.6 ms | Dotted eighth — 321.4 ms | Eighth — 214.3 ms | 16th — 107.1 ms
At 150 BPM:
Quarter note — 400 ms | Dotted eighth — 300 ms | Eighth — 200 ms | 16th — 100 ms
At 174 BPM:
Quarter note — 344.8 ms | Dotted eighth — 258.6 ms | Eighth — 172.4 ms | 16th — 86.2 ms
These values form the backbone of tempo-locked delay and reverb decisions at any tempo. When your delay calculator gives you these numbers for the session you are working on, every time-based effect you apply shares the same rhythmic reference.