Green Day · 21st Century Breakdown
Last of the American Girls
Last of the American Girls is in B major at 121.6 beats per minute.
Tempo
122 BPM · Allegromedian of 159 analyses · 121.6–121.7 across the middle eight tenths- Key
- B major5 sharps · the key most of the analyses agreed on
- Agreement
- 98%share of analyses that agreed
- Analyses
- 159people who ran the extractor
- One beat
- 493.4milliseconds, 60,000 ÷ BPM
- Tuning
- 440.3Hz · +1 cents from A 440
- Dynamics
- 3.03dB the level wanders from its average
- Loudness
- 0.864Essentia's 0–1 scale, not dB
- Danceability
- 1.146Essentia's danceability, 0–3
Source: AcousticBrainz, dump of 2022-06-23 (CC0) · MusicBrainz core data, 2026-09-17 (CC0) · how each number is measured. Measured up to 23.06.2022 — AcousticBrainz stopped collecting in 2022, so nothing released after that date is here.
What the numbers say
159 independent analyses of this recording were submitted to AcousticBrainz. All but a handful of them — 98% — put it in B major, a key signature of 5 sharps. The tempo printed above is the median of the 159 readings; 96% of them land within 2% of it, and they barely differ at all.
At 121.6 BPM one beat lasts 493.4 milliseconds, so a sixteenth note is 123.4 ms and a dotted eighth 370.1 ms — the delay times for this recording. Counted half as fast it is 60.8 BPM, counted twice as fast 243.2. A score would mark that Allegro, by the ranges this site uses.
The analyses put the reference pitch of the recording at 440.3 Hz, which is 1 cents above concert A at 440 Hz — close enough to standard that a tuner would not argue. That is a fact about this transfer of the music, not about how it was played.
The dynamic complexity of the recording measures 3.03 dB: that is how far the level wanders from its own average, so a small number means a loud, flat master and a large one means a recording that still breathes. Its average loudness is 0.864 on Essentia's 0-to-1 scale, which is not decibels and is not comparable to a streaming service's number.
10 other recordings here are in B major; the ones listed below are the closest in tempo.
Beats per bar are not in this dataset. AcousticBrainz's analysis reports a tempo, a key and a loudness, and no time signature at all, so this page does not print one — a 4/4 here would be a guess dressed as a measurement.
Keys that fit with B major
Each of these differs from B major by at most one accidental, or shares its tonic. That is the whole of what a mixing wheel encodes; here the relations are named instead of numbered.
Delay times at 122 BPM
| Note value | Beats | Milliseconds | Hertz |
|---|---|---|---|
| Whole note | 4 | 1973.7 | 0.51 |
| Half note | 2 | 986.8 | 1.01 |
| Dotted quarter | 1.5 | 740.1 | 1.35 |
| Quarter note (one beat) | 1 | 493.4 | 2.03 |
| Quarter triplet | 0.667 | 328.9 | 3.04 |
| Dotted eighth | 0.75 | 370.1 | 2.7 |
| Eighth note | 0.5 | 246.7 | 4.05 |
| Eighth triplet | 0.333 | 164.5 | 6.08 |
| Dotted sixteenth | 0.375 | 185 | 5.4 |
| Sixteenth note | 0.25 | 123.4 | 8.11 |
| Sixteenth triplet | 0.167 | 82.2 | 12.16 |
| Thirty-second note | 0.125 | 61.7 | 16.21 |
Half time 60.8 BPM · double time 243.2 BPM. Every row is one beat (493.4 ms) times the fraction in the second column.
Closest in key and tempo
- Born in the U.S.A.Bruce SpringsteenB major123BPM
- CleanDepeche ModeB major123BPM
- OuvertureDaft PunkB major123BPM
- Clearest BlueCHVRCHESB major123BPM
- CalgaryBon IverB major120BPM
- Calling ElvisDire StraitsB major120BPM
- Stupid GirlGarbageB major120BPM
- You Are Not AloneMichael JacksonB major120BPM
- Lady EvilBlack SabbathB major123BPM
- Sarah Yellin’3 Doors DownB major124BPM
Recordings in B major, ordered by how near their tempo is to 122 BPM. A calculation, not a recommendation.
All songs in B majorAll songs at 122 BPMB major at 120–129 BPMGreen Day
MusicBrainz collapses 5 recording ids into this one. Recording id 558d0dfb-6354-4e63-b0a1-7338ab3b0045.