Song Length
Calculate how long a song is from its tempo, bars and time signature.
About Song Length
Multiplying bars by beats per bar gives the total beats, and each beat lasts 60 divided by the tempo in seconds. Knowing the exact length of each section is essential when planning arrangement structure and timing edits.
Formula
Song Length
Duration = bars x beats-per-bar x 60 / BPM
- beats per bar
- The top number of the time signature
Worked example
With the default values below, Song Length returns Total Beats of 128. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Tempo (BPM)accepts 20–300 BPM
- 120 BPM
- Number of barsminimum 1
- 32
- Beats per barminimum 1
- 4
Results
- Total Beats
- 128
- Duration
- 64.0 s
- Duration
- 1.07 min
Step by step
- 1Values used
- 2Song Length
- 3Total Beats= 128
- 4Duration= 64.0 s
- 5Duration= 1.07 min
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Song Length calculated?
Duration = bars x beats-per-bar x 60 / BPM Multiplying bars by beats per bar gives the total beats, and each beat lasts 60 divided by the tempo in seconds.
Why does Song Length matter?
Knowing the exact length of each section is essential when planning arrangement structure and timing edits.
What values do I need to enter?
This calculator takes 3 inputs: Tempo (BPM), Number of bars, Beats per bar. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.