Measures → Runtime
Runtime: --
Desired Runtime → Measures Needed
Measures Needed: --
This song length calculator connects tempo, measure count, and runtime in both directions. Use it to check how long a song will run at a given tempo, or to figure out how many measures you need to fill a target length, like a three-minute radio edit.
How to Use
- To find how long a song will run, enter its tempo, beats per measure, and total measures.
- To find how many measures you need to fill a target length, enter your desired minutes, tempo, and beats per measure.
Typical Song Length by Format
Once you know your runtime, it helps to know what you're aiming for. Here's roughly how long songs run across common formats.
| Format | Typical Length | Notes |
|---|---|---|
| Radio edit | 2:30–3:30 | Trimmed for airplay and shorter attention spans |
| Streaming single | 3:00–4:00 | Most common length for modern pop and rock singles |
| Worship set song | 4:00–6:00 | Often includes an extended bridge or response section |
| Full album track | 3:00–5:00 | More room to develop without airplay constraints |
| Extended or jam version | 6:00+ | Live jams, instrumental breakdowns, extended solos |
Streaming has pushed these numbers down further. Spotify only counts a play toward royalties after about 30 seconds, and roughly a quarter of listeners skip a song within the first five seconds, so artists have a real financial incentive to hook listeners fast and keep songs tight. Average Billboard Hot 100 song length has dropped from over four minutes in 1990 to around three minutes today (source).
Frequently Asked Questions
How many measures are in a 3-minute song at 120 BPM?
About 90 measures in 4/4 time. Three minutes at 120 BPM is 360 beats total, and dividing by 4 beats per measure gives 90 measures.
Does the time signature affect the calculation?
Yes. A time signature with fewer beats per measure, like 3/4, needs more measures to fill the same runtime at the same tempo than 4/4 does.
Why do radio edits trim songs down?
Originally it was about fitting more songs into limited airplay time. The convention stuck around and now shapes how many streaming singles are arranged too.
Can I use this for time signatures other than 4/4?
Yes. Enter the correct beats per measure for your song, such as 3 for 3/4 or 6 for 6/8, and the calculator adjusts the math automatically.