How this tool works
Musicians count songs in bars (also called measures). The time signature says how many beats are in each bar, and the tempo says how many beats happen per minute. Put those together and every bar has a fixed length in seconds:
At 105 BPM in 4/4, one bar lasts 4 × 60 ÷ 105 ≈ 2.29 seconds, so an 8-bar verse lasts about 18 seconds. The planner multiplies each section’s bar count by that bar length, then adds the sections up in order. That gives each section a start time, a length and a range of bar numbers (bar 1 is the first bar of your intro), plus the total running time of the song.
For 6/8, tempo can be counted two ways. Most listeners and dancers feel two strong pulses per bar (each a dotted quarter note), but many DAWs display tempo in quarter notes, which gives three per bar. Tell the planner which one your BPM uses so the timings match your session.
The tool also finds the first section marked Chorus / Hook and reports when it starts, because how quickly a song reaches its main idea is one of the most useful things to know when shaping an arrangement.
How to use this tool
- Choose the template closest to what you are making. It loads a typical set of sections and a suggested tempo.
- Enter your real tempo and time signature.
- Edit the sections: change a section’s type, set its bars, move it up or down with the arrows, remove it, or add new ones. Most sections are multiples of 4 or 8 bars, but any whole number from 1 to 128 works.
- Press Build timeline. Check the total length, when the first hook lands and the coloured map of the song.
- Copy the arrangement map and paste it into your notes, your DAW’s marker list or a message to collaborators.
Tip: once the timeline is built, changes to section types, order or time signature update it immediately; press Build timeline again after changing bar counts or tempo.
Example calculation
The Pop / Afrobeats radio edit template at 105 BPM in 4/4 has these sections: Intro 4, Verse 8, Pre-Chorus 4, Chorus 8, Verse 8, Pre-Chorus 4, Chorus 8, Bridge 8, Chorus 8, Outro 4 — 64 bars in total.
- One bar = 4 × 60 ÷ 105 = 2.29 seconds
- Total = 64 × 2.29 ≈ 146 seconds = 2:26
- The first chorus starts after 16 bars (intro, verse, pre-chorus) = 16 × 2.29 ≈ 0:37
| Section | Bars | Starts |
|---|---|---|
| Intro | 1–4 | 0:00 |
| Verse | 5–12 | 0:09 |
| Pre-Chorus | 13–16 | 0:27 |
| Chorus / Hook | 17–24 | 0:37 |
| … | … | … |
| Outro | 61–64 | 2:17 |
Switch to the Amapiano extended template at 113 BPM and the same maths gives 136 bars and roughly 4:49 — a longer, DJ-friendly shape with a 16-bar intro and outro for mixing.
What does this result mean?
Total length tells you whether the arrangement fits its purpose. Radio and playlist edits of pop, Afrobeats and R&B are often somewhere around two and a half to three and a half minutes, while club and DJ versions (especially Amapiano and house) run longer with extended intros and outros for mixing. There is no correct length — but if a “radio edit” is running past five minutes, the timeline shows you where the time is going.
First hook at shows how long a new listener waits for the chorus. A common craft tip for streaming-era pop and Afrobeats is to reach the hook early, and many writers open with a short hook or cut the intro to a few bars for that reason. If your first hook is late, the planner flags it gently. For worship songs, DJ edits and long-form Amapiano a slower build can be exactly right.
Bar numbers make it easy to talk about the song with collaborators (“the drums drop out at bar 45”) and to place DAW markers. The colour map shows balance at a glance: a long run of one colour may mean a section outstays its welcome, while very short slivers may feel rushed.
To estimate a whole project’s length, add each finished song to the Album Runtime Calculator, or convert a single track’s bars and tempo with the Song Duration Calculator.
Common section roles
| Section | Typical job |
|---|---|
| Intro | Sets the tempo, sound and mood. Short for radio edits; long (16–32 bars) for DJ-friendly club versions. |
| Verse | Tells the story or builds the scene. Lyrics usually change from verse to verse. |
| Pre-Chorus | Raises tension and signals that the hook is coming, often with a harmonic or rhythmic lift. |
| Chorus / Hook | The main idea and the part people remember and sing back. Usually repeats with the same words. |
| Post-Chorus | A short, often wordless or chant-like tag after the hook — popular in pop and Afrobeats for extra catchiness. |
| Bridge | Contrast: new chords, a new angle in the lyric or a breakdown before the final hooks. |
| Breakdown | Strips the arrangement back to build anticipation. |
| Drop / Log-drum section | The instrumental peak of a dance record; in Amapiano, the log drum and groove take centre stage. |
| Rap verse | A featured or main verse, commonly 12–16 bars in hip-hop. |
| Instrumental / Outro | Space for solos, ad-libs, a vamp or a DJ-friendly ending. |
For more on how arrangement choices shape a record, see our features on Amapiano and on contemporary gospel production.
Important limitations
- Steady tempo assumed. Timings are exact only if the song stays at one tempo. Tempo changes, rubato ballads, live recordings and fermatas (held pauses) will differ.
- One time signature for the whole song. If a section switches metre, plan it as an equivalent number of 4/4 bars or split the calculation.
- Pickups and tails are not counted. Vocal pickups before bar 1, reverb tails and silence at the end add a little real-world length.
- Section names are labels only. The tool treats only “Chorus / Hook” as the hook when timing the first hook.
- Templates are starting points, based on common arrangement habits rather than rules or data about any particular chart.
- Times are rounded to the nearest second for display; the underlying calculation keeps full precision.
Frequently asked questions
How many bars is a verse or chorus?
Eight and sixteen bars are the most common, with four-bar pre-choruses and intros. Rap verses are often 12 or 16 bars. These are habits, not rules — write what the song needs and let the planner show you the timing.
How do I work out how long a bar is?
Divide 60 by the BPM and multiply by the beats in a bar. At 120 BPM in 4/4, a bar is 4 × 60 ÷ 120 = 2 seconds. The planner shows this as “One bar lasts”.
How long should a song be?
It depends on the genre and purpose. Radio and playlist edits of pop, Afrobeats and R&B are often around two and a half to three and a half minutes, while dance records and DJ versions run longer. Build the arrangement that serves the song, then check the total here.
How early should the hook come in?
A widely shared craft tip for streaming-era pop is to get to the hook early, sometimes by opening with it. The planner flags a first hook that starts after about 50 seconds, but it is only a prompt to consider — plenty of great songs take their time.
What BPM should I use for 6/8?
Enter whatever your DAW or metronome shows, then tell the planner whether that number counts the felt pulse (two dotted-quarter beats per bar) or quarter notes (three per bar). The timings will then match your session.
Can I plan a DJ or extended mix?
Yes. Start from the Amapiano extended template or add long intro and outro sections (16 or 32 bars) so DJs have room to mix in and out.
Does the planner save my arrangement?
No. Nothing is stored or sent anywhere. Use “Copy arrangement” to keep a plain-text copy.
