Delay Time Calculator
Convert BPM into tempo-synced delay times for straight, dotted, and triplet note values.
500 ms as a straight quarter note corresponds to 120 BPM.
Quarter note — Straight
0.5000 seconds • 2.000 Hz
Tempo-synced delay table
Click any timing value to make it the selected result.
| Note | Straight | Dotted | Triplet | Hz (Straight) |
|---|
Session history
Recent selected values are stored only for this browser session.
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Formula
A quarter note in milliseconds is calculated as 60,000 ÷ BPM. Other rhythmic values are derived from that duration; dotted values are 1.5× the straight value and triplets are 2/3 of it.
Accuracy
The calculations are mathematical tempo relationships. Your actual audible delay can still differ because of plugins, buffers, hardware, Bluetooth, drivers, DAW compensation, and other parts of the audio path.
Privacy
All calculations happen locally in your browser. No audio, tempo values, or calculation history needs to be uploaded.
The Delay Time Calculator converts tempo in beats per minute (BPM) into musical delay times in milliseconds. It is designed for producers, mixing engineers, musicians, and anyone who needs to synchronize delay, echo, modulation, or other time-based effects to a song’s tempo.
Enter a BPM and the calculator instantly shows straight, dotted, and triplet note values from whole notes down to short rhythmic subdivisions. You can also convert an existing delay time back into BPM, use Tap Tempo to estimate a song’s tempo, and view equivalent timing in milliseconds, seconds, and Hertz.
Unlike an Audio Latency Test, this calculator does not measure hardware or system delay. It calculates exact mathematical relationships between musical tempo and rhythmic time.
How to Use the Delay Time Calculator
Start by entering the tempo of your track in BPM. For example, if your project is running at 120 BPM, enter 120.
The results update automatically and provide timing values for:
- Whole notes
- Half notes
- Quarter notes
- Eighth notes
- 16th notes
- 32nd notes
- 64th notes
- Straight notes
- Dotted notes
- Triplet notes
Click any value in the timing table to make it your selected result. The highlighted result shows the delay in milliseconds, seconds, and Hz, making it easy to transfer the number into a delay plugin, modulation effect, or other audio processor.
If you do not know the BPM, use Tap Tempo. Tap the button repeatedly in time with the music and the calculator will estimate the tempo from the intervals between your taps.
You can also choose the Delay → BPM mode when you already know a delay value but want to determine the corresponding musical tempo.
How BPM Is Converted to Delay Time
The calculation starts with the duration of one quarter note.
The formula is:
Quarter-note duration = 60,000 ÷ BPM
At 120 BPM:
60,000 ÷ 120 = 500 ms
So a quarter note at 120 BPM lasts 500 milliseconds.
The remaining rhythmic subdivisions can then be derived from that value.
At 120 BPM:
| Note Value | Straight Delay |
|---|---|
| Whole note | 2000 ms |
| Half note | 1000 ms |
| Quarter note | 500 ms |
| Eighth note | 250 ms |
| 16th note | 125 ms |
| 32nd note | 62.5 ms |
| 64th note | 31.25 ms |
This relationship is different from system audio delay. If you are researching delays caused by buffers, drivers, interfaces, or processing rather than musical tempo, read our guide to what audio latency is.
Straight, Dotted, and Triplet Delay Times
Musical delay does not have to repeat only on ordinary straight note divisions. Dotted and triplet timings can create very different rhythmic effects.
Straight Notes
A straight delay follows the normal binary subdivision of the beat.
At 120 BPM:
- Quarter = 500 ms
- Eighth = 250 ms
- 16th = 125 ms
Straight values work well when you want echoes to land directly on regular subdivisions of the song.
Dotted Notes
A dotted note lasts 1.5 times the duration of the equivalent straight note.
For example:
A straight eighth note at 120 BPM is 250 ms.
A dotted eighth is:
250 × 1.5 = 375 ms
Dotted eighth delays are widely used for rhythmic echoes because the repeats interact with the main beat rather than simply duplicating it.
Triplets
A triplet subdivision divides timing into groups of three instead of the ordinary binary division.
The calculator uses 2/3 of the corresponding straight duration for the triplet value.
At 120 BPM:
A straight quarter note is 500 ms.
A quarter-note triplet is approximately:
333.33 ms
Being able to compare straight, dotted, and triplet values side by side makes it easier to find a delay rhythm that complements the arrangement.
How to Read the Results
The selected result contains three useful measurements.
Milliseconds (ms) are the value most delay plugins use. If your plugin asks for manual delay time instead of musical synchronization, this is usually the value you need.
Seconds provide the same duration in a larger unit. For example, 500 ms equals 0.5 seconds.
Hertz (Hz) describes how many cycles or repeats of that duration occur per second.
The relationship is:
Hz = 1000 ÷ milliseconds
A 500 ms duration therefore corresponds to:
1000 ÷ 500 = 2 Hz
This can be useful when synchronizing LFOs, modulation rates, tremolo, filter movement, or other frequency-based controls. For additional frequency conversions, you can use the Frequency Calculator or convert frequencies into musical pitches with the Hz to Note Converter.
Delay Time Examples at Common Tempos
Different tempos produce very different delay values.
| BPM | Quarter | Eighth | Dotted Eighth | Eighth Triplet |
|---|---|---|---|---|
| 60 | 1000 ms | 500 ms | 750 ms | 333.3 ms |
| 80 | 750 ms | 375 ms | 562.5 ms | 250 ms |
| 100 | 600 ms | 300 ms | 450 ms | 200 ms |
| 120 | 500 ms | 250 ms | 375 ms | 166.7 ms |
| 128 | 468.8 ms | 234.4 ms | 351.6 ms | 156.3 ms |
| 140 | 428.6 ms | 214.3 ms | 321.4 ms | 142.9 ms |
| 160 | 375 ms | 187.5 ms | 281.3 ms | 125 ms |
These numbers are mathematical timing values rather than recommendations for how much delay every mix should use.
The best rhythmic choice depends on the arrangement, source material, desired groove, feedback level, and how the repeats interact with other instruments.
Using Delay Time in Music Production
Tempo-synchronized delay is useful because repeats can reinforce the musical rhythm instead of occurring at arbitrary intervals.
For vocals, a shorter subdivision can create width or rhythmic movement without producing a long obvious echo. Longer values may create spacious repeats between phrases.
For guitar, synthesizers, and melodic instruments, dotted or triplet timings can create patterns that interact with notes being played.
For drums and percussion, shorter rhythmic subdivisions can create complex grooves and repeating textures.
The calculation itself remains the same regardless of the DAW or plugin you use. Our guide to audio latency in music production explains a separate but related issue: the delay introduced by audio interfaces, buffers, plugins, and monitoring systems.
Convert Delay Time Back to BPM
The reverse calculator is useful when you already have a delay setting and want to know which tempo it corresponds to.
Suppose a plugin is set to 500 ms.
If that value represents a straight quarter note, the corresponding tempo is:
120 BPM
However, 500 ms does not always represent a quarter note. It could represent another rhythmic subdivision at a different tempo.
That is why the reverse mode lets you specify both the note value and whether it is straight, dotted, or triplet.
This gives a more meaningful BPM calculation than assuming every delay value represents the same musical subdivision.
Delay Time vs Audio Latency
Delay time and audio latency are related to time, but they describe different things.
Delay time is usually an intentional musical effect. A producer might deliberately set a delay plugin to 375 ms so repeats synchronize with a dotted eighth note.
Audio latency is an unintended or unavoidable delay between an action and the resulting sound. It can come from audio buffers, interfaces, Bluetooth connections, drivers, software processing, and other stages in the signal path.
For example, if you press a MIDI keyboard key and hear the note noticeably later, that is latency—not a tempo-synchronized delay effect.
If you are troubleshooting that kind of problem, see input vs output latency and our practical guide on how to reduce audio latency.
Accuracy and Rounding
The mathematical relationship between BPM and note duration is deterministic, so the underlying calculation does not depend on listening conditions or hardware.
However, displayed values may require rounding.
For example, a quarter note at 128 BPM is:
468.75 ms
A plugin may allow you to enter:
- 469 ms
- 468.8 ms
- 468.75 ms
depending on its available precision.
For most musical applications, small rounding differences are unlikely to change the intended rhythmic subdivision substantially. The calculator provides multiple precision options so you can match the type of control available in your software or hardware.
Do not confuse these calculated timing values with sample-rate or buffer latency. If you are investigating those issues, our guide to sample rate and latency explains how digital audio settings affect processing delay.
Privacy
The Delay Time Calculator performs its calculations locally in your browser.
It does not need microphone access, audio uploads, or an account. Recent selected calculations may be stored temporarily in browser session storage so you can compare results during the current session.
Frequently Asked Questions
How do I calculate delay time from BPM?
Divide 60,000 by the BPM to find the duration of a quarter note in milliseconds. Other note values can then be calculated from the quarter-note duration.
How many milliseconds is 120 BPM?
At 120 BPM, a quarter note lasts 500 ms. An eighth note lasts 250 ms, while a 16th note lasts 125 ms.
What is a dotted eighth delay at 120 BPM?
A straight eighth note at 120 BPM is 250 ms. Multiplying that by 1.5 gives a dotted eighth delay of 375 ms.
What is an eighth-note triplet at 120 BPM?
An eighth-note triplet at 120 BPM is approximately 166.67 ms.
Can I convert milliseconds back into BPM?
Yes. Use the Delay → BPM mode and specify the delay time, rhythmic note value, and whether it is straight, dotted, or triplet.
Why does the calculator show Hz?
Hz can be useful when a plugin or synthesizer expresses modulation speed as frequency instead of milliseconds. The calculator converts the selected duration into cycles per second.
Is delay time the same as audio latency?
No. Musical delay is generally intentional, while audio latency describes processing or transmission delay in an audio system.
What delay value should I use in my mix?
There is no universal best value. Tempo-synchronized values give you mathematically aligned starting points, but the final choice depends on the sound, arrangement, feedback, mix density, and creative goal.