Song Length Calculator
Calculate song duration, bars, and timing. Plan your song structure with precision using BPM and time signature.
Visual Timeline
Genre Presets
Pro Tips for Song Length Planning
- •Standard verse: 16 bars | Standard chorus: 8 bars | Bridge: 8 bars
- •Most radio-friendly songs are between 3:00-3:30 minutes total
- •TikTok and social media favor shorter songs (2:00-2:30)
- •In rap, 16 bars gives you room for about 8-12 lines depending on flow
- •Faster BPM = more bars needed for the same duration
How the Song Length Calculator Works
The Song Length Calculator runs entirely in your browser -- no data is sent to any server. Enter your song parameters and instantly see the calculated duration, making it easy to plan your song structure.
Step 1: Enter BPM and Bar Count
Type in the tempo (BPM) of your song and the number of bars or measures you want to calculate. You can enter values for individual sections like a verse, chorus, or the entire song.
Step 2: Select Time Signature
Choose your time signature (4/4, 3/4, 6/8, etc.) to tell the calculator how many beats are in each bar. Most popular music uses 4/4 time, but waltzes and some ballads use 3/4.
Step 3: Get Your Estimated Duration
The calculator instantly displays the duration in minutes and seconds. Use this to plan your song structure, ensure sections are the right length, and hit your target song duration for streaming or radio.
How Song Duration is Calculated
Understanding the relationship between tempo (BPM), time signature, and bars is essential for planning your song structure. The duration of your song is determined by how these three elements interact.
The mathematical formula is:
Duration (seconds) = (Bars × Beats per Bar × 60) / BPM
Here's what each component means:
- •BPM (Beats Per Minute): The tempo of your song. Higher BPM means faster tempo and shorter duration for the same number of bars.
- •Time Signature: Determines beats per bar. In 4/4 time, each bar has 4 beats. In 3/4 time, each bar has 3 beats.
- •Bars (Measures): A musical unit containing a specific number of beats. Most popular music uses 4, 8, 16, or 32 bar sections.
For example, a 16-bar verse at 100 BPM in 4/4 time equals (16 × 4 × 60) / 100 = 38.4 seconds. Use our calculator above to instantly compute any combination of these values.
Standard Song Lengths by Genre
Different music genres have typical BPM ranges and song structures. Here's a breakdown of common formats:
Hip Hop / Rap
- Typical BPM:70-110
- Verse length:16 bars
- Chorus length:8 bars
- Typical duration:3:00-4:00
Pop Music
- Typical BPM:100-130
- Verse length:8-16 bars
- Chorus length:8 bars
- Typical duration:3:00-3:30
EDM / House
- Typical BPM:120-130
- Build-up:16-32 bars
- Drop length:32 bars
- Typical duration:3:30-4:30
Trap Music
- Typical BPM:140-160
- Verse length:8-16 bars
- Hook length:4-8 bars
- Typical duration:2:30-3:30
Acoustic / Ballad
- Typical BPM:60-80
- Verse length:16 bars
- Chorus length:8 bars
- Typical duration:3:30-4:30
Rock Music
- Typical BPM:110-140
- Verse length:16 bars
- Chorus length:8 bars
- Typical duration:3:00-4:00
Planning Your Song Length
- 1Choose Your Tempo First:
Select a BPM that matches your genre and desired energy level. Faster tempos create urgency, slower tempos create space for vocals and emotion.
- 2Plan Your Song Structure:
Map out your sections (intro, verse, chorus, bridge, outro) and assign bar counts to each. A typical structure is: Intro (4-8), Verse (16), Chorus (8), repeated as needed.
- 3Calculate Total Duration:
Use our calculator to determine how long each section will be, then add them up. Most streaming platforms favor songs between 2:30 and 4:00 minutes.
- 4Consider Platform Requirements:
Radio typically prefers 3:00-3:30, TikTok favors 2:00-2:30, while playlists are flexible. Plan your length based on where you want the song to be heard.
- 5Account for Variations:
Leave room for tempo changes, time signature shifts, or extended outros. Your final mix might be slightly different from your calculated plan.
- 6Match Bar Count to Content:
In rap, ensure you have enough bars for your lyrical content. In EDM, allow enough bars for builds and drops. Quality over quantity always wins.
Frequently Asked Questions
How long is 16 bars at 120 BPM?
At 120 BPM in 4/4 time signature, 16 bars equals 32 seconds. This is calculated as (16 bars × 4 beats per bar × 60 seconds) / 120 BPM = 32 seconds. This is a common length for a rap verse.
How many bars are in a 3 minute song?
In a 3 minute song at 120 BPM (4/4 time), there are 90 bars. This is calculated as (180 seconds × 120 BPM) / (4 beats per bar × 60) = 90 bars. The actual number varies based on tempo and time signature.
How do you calculate song duration from bars?
Song duration is calculated using the formula: Duration (seconds) = (Number of Bars × Beats per Bar × 60) / BPM. For example, 32 bars at 140 BPM in 4/4 time equals (32 × 4 × 60) / 140 = 54.86 seconds.
What is the standard length for a rap verse?
A standard rap verse is typically 16 bars, which at 85-100 BPM in 4/4 time equals approximately 38-45 seconds. Some artists use 12 or 24 bar verses depending on their style and song structure.
How many bars should a chorus be?
A typical chorus is 8 bars in most genres, though this can vary. In pop music at 120 BPM, an 8 bar chorus is 16 seconds. Hip hop choruses may be 8-16 bars, while EDM drops can be 16-32 bars.
Does time signature affect song length?
Yes, time signature directly affects song length. In 3/4 time, each bar has 3 beats instead of 4, so the same number of bars will be shorter. For example, 16 bars at 120 BPM is 32 seconds in 4/4 but only 24 seconds in 3/4.
What BPM is typical for different music genres?
Hip hop: 70-110 BPM, Pop: 100-130 BPM, EDM/House: 120-130 BPM, Trap: 140-160 BPM, Rock: 110-140 BPM, Ballads: 60-80 BPM. These ranges help determine how many bars fit in a given song duration.
How do I plan my song structure using bars?
A typical song structure is: Intro (4-8 bars), Verse (16 bars), Chorus (8 bars), Verse (16 bars), Chorus (8 bars), Bridge (8 bars), Chorus (8 bars), Outro (4-8 bars). Adjust based on your genre and desired song length.
How long should a song be for streaming platforms?
Most streaming platforms count a play after 30 seconds of listening, so songs should be at least that long to register streams. The sweet spot for playlist placement is typically 2:30 to 3:30 minutes. Shorter songs can accumulate more plays per listening session, while longer songs earn slightly more per stream on some platforms.
What is the difference between bars and beats?
A beat is a single pulse in music, while a bar (or measure) is a group of beats defined by the time signature. In 4/4 time, one bar contains 4 beats, so 16 bars equals 64 individual beats. Understanding this distinction is essential for accurately calculating song duration and planning your arrangement.