Enter a song's BPM (tempo), time signature, number of bars, and repetitions to calculate the total karaoke song length. The Karaoke Song Length Calculator breaks down beat duration, bar length, and full song runtime — so you can plan your setlist and keep the night on schedule.
Total Song Length
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Song Duration (mm:ss)
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Length of 1 Beat
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Length of 1 Bar
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Total Beats
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Total Time (All Repetitions)
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Divide 60 by the BPM to get the length of one beat in seconds. Multiply that by the number of beats per bar (from the time signature), then multiply by the total number of bars. For example, at 120 BPM in 4/4 time with 80 bars: (60/120) × 4 × 80 = 160 seconds.
It depends on the tempo. At 120 BPM in 4/4 time, each bar lasts 2 seconds, so 16 bars = 32 seconds. At a slower 80 BPM, each bar lasts 3 seconds, making 16 bars equal 48 seconds. Use this calculator to get the exact duration for any tempo.
One bar = (60 ÷ BPM) × beats per bar. At 120 BPM in 4/4 time, a bar lasts (60 ÷ 120) × 4 = 2 seconds. In 3/4 time at the same tempo, a bar lasts 1.5 seconds.
At 120 BPM in 4/4 time, each bar is 2 seconds, so 2 minutes (120 seconds) holds exactly 60 bars. At 100 BPM, each bar is 2.4 seconds, giving about 50 bars in 2 minutes. The calculator works this out automatically for any tempo.
Most pop songs fall in the range of 80–120 bars. A standard 3-minute pop song at 120 BPM in 4/4 time contains roughly 90 bars. Verse-chorus structures typically use 16–32 bars per section.
A beat is the basic pulse of the music — BPM counts how many beats happen per minute. A bar (also called a measure) is a group of beats defined by the time signature. In 4/4 time, one bar contains 4 beats. The terms 'bar' and 'measure' are interchangeable.
The time signature tells you how many beats are in each bar. A 4/4 bar has 4 beats while a 3/4 bar has only 3. Since bar length = beat duration × beats per bar, the same number of bars at the same BPM will produce a shorter song in 3/4 than in 4/4.
Enter the BPM, time signature, and bars for each song, then use the Repetitions field to account for multiple performances. The total time output helps you see how many songs fit into a given slot, whether it's a 15-minute warm-up or a 2-hour karaoke night.