Bars & Beats to Time Calculator (BPM)

How it works

Beat (s) = 60 ÷ BPM × (beat unit ÷ tempo note) — with a quarter-note tempo, 60 ÷ BPM × 4 ÷ beat unit; bar = beat × beats per bar; time = bars × bar + extra beats × beat; bars = seconds ÷ bar; BPM = bars × beats per bar × 60 ÷ seconds (in tempo notes); position bar.beat.sixteenth → ((bar − 1) × beats per bar + (beat − 1) + (sixteenth − 1) ÷ sixteenths per beat) × beat; samples per beat = beat × sample rate; frames per beat = beat × fps

Tempo is beats per minute, so one quarter-note beat lasts 60 ÷ BPM seconds and a bar of 4/4 four times that — 1.875 s at 128 BPM, which makes a 32-bar section exactly one minute. Working the other way turns a target duration into a bar count, which is how producers plan arrangements in multiples of eight bars and how composers hit picture cues; and if you know how many bars a passage has and how long it lasts, the calculator finds the tempo. Type your arrangement one section per line to get a timeline with the start and end time of every section, or enter a DAW position such as 33.1.1 to see exactly when it falls — handy for lining up a drop with a video cut. Other meters change the arithmetic only through the beat unit and count, plus one convention you can choose: DAWs such as Ableton Live and Logic Pro always count quarter notes, so a bar of 6/8 at 120 BPM lasts 1.5 s, while sheet music in 6/8 usually gives the tempo in dotted quarters, making the same bar 1 s long. The note-length table gives straight, dotted and triplet values in milliseconds for tempo-synced delays and LFOs, the sample count per beat helps loops tile without a click, and the optional frame rate gives frames per beat and timecode for scoring to picture.

Worked example

At 128 BPM in 4/4 a beat is 468.75 ms and a bar 1.875 s, so 32 bars last exactly 1:00.00. A 3:30 track is 112 bars — a 112-bar arrangement of 8-bar sections — and a beat holds 20,672 samples at 44.1 kHz. The default arrangement (intro 8, verse 16, chorus 8, verse 16, chorus 8, bridge 8, chorus 16, outro 8 = 88 bars) lasts 2:45.00, with the bridge starting at bar 73, 2:15.00 in. Position 33.1.1 is 32 bars in, exactly 1:00.00. Going the other way, 64 bars of 4/4 that last 2:00 are at 128 BPM.

Frequently asked questions