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Work out an audio file's size from bitrate and length, the bitrate from size and length, or how long fits in a given size — with MP3, AAC, FLAC and WAV compared.
Also covers: Audio bitrate calculator · Audio file-size calculator · MP3 size calculator · WAV size calculator
= 210 seconds
= 1,411.2 kbps
File size
8.4 MB
8,400,000 bytes · 8.011 MiB (what Windows calls “MB”)
Per minute
2.4 MB
Per hour
144 MB
CD (80 min)
192 MB
at this bitrate
Same 3:30.0 in other formats
| Format | Bitrate | Size |
|---|---|---|
| CD audio / WAV 16-bit 44.1 kHz stereo | 1411.2 kbps | 37.04 MB |
| WAV 24-bit 48 kHz stereo | 2304 kbps | 60.48 MB |
| FLAC (typical CD rip) | 900 kbps | 23.63 MB |
| MP3 320 kbps | 320 kbps | 8.4 MB |
| MP3 VBR V0 | 245 kbps | 6.431 MB |
| MP3 VBR V2 | 190 kbps | 4.988 MB |
| MP3 192 kbps | 192 kbps | 5.04 MB |
| MP3 128 kbps | 128 kbps | 3.36 MB |
| AAC 256 kbps | 256 kbps | 6.72 MB |
| Opus 160 kbps | 160 kbps | 4.2 MB |
| Ogg Vorbis 320 kbps | 320 kbps | 8.4 MB |
| Ogg Vorbis 160 kbps | 160 kbps | 4.2 MB |
| Podcast MP3 mono 64 kbps | 64 kbps | 1.68 MB |
| Opus 32 kbps (voice) | 32 kbps | 840 KB |
| WAV file (44100 Hz / 16-bit / 2 ch, with header) | 1,411.2 kbps | 37.04 MB |
Sizes are audio data only; tags and cover art add to it (a 600 × 600 JPEG cover is typically 50–150 KB). VBR and lossless sizes are averages — the real size depends on the music.
Audio bitrates use decimal kilobits: 1 kbps = 1,000 bits per second, so 128 kbps is 16,000 bytes per second.
File size, bitrate or duration.
Pick a common format or type any bitrate; the uncompressed PCM helper works out WAV bitrates.
Size in bytes = bitrate (bits per second) × duration ÷ 8. A 3½-minute song at 320 kbps is 320,000 × 210 ÷ 8 = 8.4 MB.
44,100 samples × 16 bits × 2 channels = 1,411.2 kbps, about 10.6 MB per minute.
Windows divides by 1,048,576 and calls it MB (really MiB). 100 MB is 95.4 MiB.
Variable-bitrate files spend more bits on complex passages, so the average depends on the music. The presets show typical averages.
Edit
Cut an MP3, WAV or other audio file to the part you want: drag across the waveform, fine-tune the times, and save as MP3 or WAV — in your browser.
Edit
Join several audio files into one, in the order you choose, with optional gaps or crossfades — mixed formats and sample rates are handled for you.
Edit
Split an audio file into parts at points you click, into equal parts, every N seconds or at silences, and download each part or all of them as a ZIP.
Edit
Make audio louder or quieter by decibels, normalise to a peak level, or to a loudness target (LUFS) for Spotify, YouTube, Apple Music or podcasts.
Edit
Add a fade-in and fade-out to audio with linear, exponential, logarithmic, equal-power or S-curve shapes, and hear the result before saving.
Edit
Speed up or slow down audio without changing the pitch — or tape-style, where pitch follows speed — from 0.25× to 4×.