Convertisseur de débit binaire en taille de fichier

The Bitrate to File Size Converter estimates final file size from video or audio bitrate × duration. Formula: File Size (MB) = (Bitrate × Duration × 60) ÷ 8 ÷ 1024 ÷ 1024. The division by 8 converts bits to bytes; the two divisions by 1024 convert to megabytes. Essential for streaming planning, video upload preparation, storage management, and bandwidth budgeting. Most users underestimate storage requirements until running out of disk space during a 4K project or streaming budget. Common bitrates by quality tier: **Audio:** AAC 128 kbps (Spotify standard) = 1 MB/min, AAC 320 kbps (high quality streaming) = 2.4 MB/min, FLAC ~1000 kbps lossless = 7.5 MB/min, uncompressed WAV 1411 kbps CD quality = 10.6 MB/min, 96 kHz hi-res 4608 kbps = 34.5 MB/min. **Video:** 720p YouTube 5 Mbps = 38 MB/min, 1080p YouTube 8 Mbps = 60 MB/min, 1080p Blu-ray quality 25 Mbps = 188 MB/min, 4K Netflix 15-25 Mbps = 112-188 MB/min, 4K HDR YouTube 35 Mbps = 263 MB/min, 4K ProRes editing 800 Mbps = 6 GB/min, 8K production 1500+ Mbps = 11 GB/min. Compression context: modern codecs (H.265/HEVC, AV1) achieve 30–50% better compression than older H.264 at same visual quality. Streaming services (Netflix, YouTube, Twitch) use sophisticated per-title bitrate optimization — same visual quality can be achieved at different bitrates depending on content complexity (animation vs live-action, fast vs slow motion). The headline 'Bitrate' in this calculator represents the encoder's setting; actual file size will match closely for constant bitrate (CBR) encoding, but variable bitrate (VBR) encoding produces somewhat different real sizes (lower if scene complexity averages lower than target). Use cases: Twitch streamers checking if their internet upload can sustain target bitrate; YouTubers estimating upload time and storage; video editors planning project storage; podcast producers calculating hosting costs; archivists planning media preservation storage. For streaming: required upload bandwidth in Mbps = stream bitrate in Mbps + 20% overhead headroom. A 6 Mbps stream needs 7.2+ Mbps actual upload capability sustained.

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1. 1Step 1 — Enter bitrate (in Mbps for video, Kbps usually for audio)
2. 2Step 2 — Select unit (Mbps or Kbps to match input)
3. 3Step 3 — Enter content duration in minutes
4. 4Step 4 — Calculator converts bitrate to bytes per second (divide by 8)
5. 5Step 5 — Multiplies by duration × 60 for total bytes
6. 6Step 6 — Converts to MB (÷ 1024 × 1024) and GB (÷ 1024) for display
7. 7Step 7 — Output displays both MB and GB for different scale comparisons

• !Confusing bitrate (data rate, bps) with bit depth (audio sample size, 16/24/32-bit) — different concepts
• !Underestimating storage needs for 4K/8K editing projects
• !Not factoring upload bandwidth headroom for streaming (need 20% buffer above bitrate)
• !Comparing old codec bitrate to new codec bitrate at face value — H.265 needs less bitrate than H.264 for same quality
• !Setting Twitch/YouTube bitrate higher than upload bandwidth can sustain — causes stream drops