Song Length Formula — Exactly How to Hit 2:00, 3:00, 3:30, 4:00

The #1 complaint from Suno users is "my song came out too short" or "it cut off before the last chorus." Suno has a hard time with length — not because it's bad at generation, but because most people don't give it enough structural instruction. When you leave length vague, Suno picks for you, and the default is almost always shorter than you want. Here's how to hit each target length with near-perfect accuracy.

2:00 — TikTok / Short-Form

For Instagram, TikTok, Reels, and other short-form platforms. Skip the bridge entirely.

[Intro: 4 bars]
[Verse 1] — 4 lines
[Chorus] — 4 lines
[Verse 2] — 4 lines
[Chorus] — 4 lines
[Outro: 4 bars]

Target: ~2:00 at 120 BPM. The absence of a bridge is what keeps this tight.

2:30 — Short Radio Edit

Just enough room for a bridge, still radio-tight.

[Intro: 4 bars]
[Verse 1] — 4 lines
[Chorus] — 4 lines
[Verse 2] — 4 lines
[Chorus] — 4 lines
[Bridge] — 4 lines
[Chorus] — 4 lines
[Outro: 4 bars]

3:00 — Standard Radio Format

The classic pop structure. Pre-chorus lifts into each chorus for maximum hook impact.

[Intro: 8 bars]
[Verse 1] — 6 lines
[Pre-Chorus] — 2 lines
[Chorus] — 4 lines
[Verse 2] — 6 lines
[Pre-Chorus] — 2 lines
[Chorus] — 4 lines
[Bridge] — 4 lines
[Chorus] — 4 lines
[Outro: 8 bars]

3:30 — Full Radio Single

Same structure as 3:00, with three small additions:

• Replace the final [Chorus] with [Double Chorus] (chorus repeats with a lift in energy).
• Extend the outro to 12 bars.
• Add one extra line per verse (so 7 lines each instead of 6).

4:00 — Album Cut

Full album-length track with an instrumental break. Room to breathe.

[Intro: 8 bars]
[Verse 1] — 8 lines
[Chorus] — 4 lines
[Verse 2] — 8 lines
[Chorus] — 4 lines
[Instrumental Break: 8 bars]
[Bridge] — 6 lines
[Double Chorus] — 8 lines
[Outro: 16 bars with fade]

5:00+ — Epic / Prog / Jam

For longer tracks, stack multiple sections and use a long-fade outro:

• Add a second pre-chorus, a second bridge, an instrumental solo.
• Use [Outro: long fade, 24+ bars] for the ending.
• Consider splitting into two sections with different feels — [Part 1] and [Part 2].

Line Timing Reference (at 120 BPM, 4/4)

• 4-line verse ≈ 15 seconds
• 6-line verse ≈ 22 seconds
• 8-line verse ≈ 30 seconds
• Chorus (4 lines) ≈ 15–18 seconds
• Bridge (4–6 lines) ≈ 18–25 seconds
• Intro (4 bars) ≈ 8 seconds
• Intro (8 bars) ≈ 16 seconds

At 80 BPM, every section runs ~50% longer than at 120 BPM. Keep that in mind when converting the formulas above to a slower tempo.

Pro Tips

• Suno tends to sprint. Add "half-time feel" or "patient tempo" to lengthen lines naturally without changing BPM.
• Fewer words per line = longer song. One syllable per beat stretches the vocal; three syllables compresses it.
• If a song keeps coming out too short, add an [Instrumental: 8 bars] tag between the chorus and bridge.
• To prevent cut-off at the end, always use an explicit `[Outro: X bars]` tag — never just [End]. [End] often triggers an abrupt stop.
• Check your BPM. At 80 BPM, every section runs ~50% longer than at 120 BPM — a 3:00 formula becomes ~4:30.

The Bottom Line

Song length isn't random — it's a direct function of structure, line count, and BPM. Pick a target duration, match it to one of these five formulas, and you'll stop burning credits on songs that cut off mid-chorus. Save this chart, and the next time someone asks "why is my Suno song only 1:45?" — you'll know the answer.