Stream Storage Per Hour Calculator

About the Stream Storage Per Hour Calculator

Every minute of streaming or recording generates a file that takes up disk space. The amount depends almost entirely on your bitrate setting — the higher the bitrate, the larger the file. Most streamers also save a local recording while streaming, which can quickly consume hundreds of gigabytes per month.

This calculator converts your bitrate into gigabytes per hour so you can plan your storage needs. Whether you're archiving VODs, keeping local recordings for highlight editing, or managing Twitch's automatic VOD storage, knowing the per-hour size helps you decide when to invest in more storage or adjust your settings.

Streamers who record at high bitrates for YouTube uploads often need separate storage drives. A single 6-hour stream at 8,000 kbps generates over 21 GB of data. Multiply that by 20 streams per month and you're looking at 420+ GB just for raw recordings.

Use the estimate as a planning baseline and adjust it once you have real session data from the game you are playing.

When This Page Helps

Running out of disk space mid-stream is a nightmare that can silently stop your local recording. This calculator helps you estimate exactly how much storage each stream consumes so you can plan ahead. It's also essential for budgeting cloud storage costs if you archive VODs to Google Drive, Dropbox, or a NAS.

How to Use the Inputs

1. Enter your stream or recording bitrate in kbps (e.g., 6000 for Twitch).
2. The calculator converts bitrate to gigabytes per hour.
3. Use the result to estimate weekly and monthly storage needs.
4. Plan your storage purchases or cleanup schedule accordingly.

Example Calculation

Tips & Best Practices

• Keep at least 100 GB free for recording buffer to avoid mid-stream failures.
• Use a dedicated SSD for recordings to avoid write-speed bottlenecks.
• Set OBS to automatically remux recordings from .mkv to .mp4 after each stream.
• Consider a NAS or external drive for long-term VOD archival.
• Lower your local recording bitrate if you don't plan to upload to YouTube.
• Schedule weekly cleanup of old recordings to free space.

Understanding Stream File Sizes

File size is directly proportional to bitrate and duration. Double your bitrate and the file doubles in size. Double your stream length and the file doubles. This linear relationship makes planning straightforward once you know your bitrate.

Codec Efficiency Matters

H.264 is the standard streaming codec, but H.265 (HEVC) and AV1 produce smaller files at the same quality. NVENC on RTX 40-series GPUs supports AV1 encoding, which can reduce file sizes by 30-50% compared to H.264. If your hardware supports it, using a more efficient codec for local recordings saves significant storage.

Planning for Growth

New streamers often underestimate storage needs. Start with at least 1 TB dedicated to recordings, and plan to move archived content to cheaper storage (external HDDs or cloud) monthly. A serious content creator streaming 5 days per week at 8,000 kbps needs roughly 500 GB per month just for raw recordings.

Frequently Asked Questions

• How much storage does a Twitch stream use per hour?

  At the recommended 6,000 kbps, each hour uses approximately 2.70 GB. A 4-hour stream produces about 10.8 GB. This applies to local recordings at the same bitrate — Twitch stores VODs on their servers.

• Does audio bitrate affect storage significantly?

  Audio is typically 128–320 kbps, which adds 0.06–0.14 GB per hour. It's a small fraction compared to video bitrate but should be included for precise estimates. This calculator focuses on total bitrate including audio.

• Should I record locally while streaming?

  Yes, local recordings give you higher quality footage for highlights and YouTube uploads. Twitch VODs are compressed and time-limited. Use OBS's dual-output feature to stream at one bitrate and record at a higher one.

• What format should I record in?

  Record in MKV format for crash safety — MKV files remain playable even if OBS crashes. After the stream, remux to MP4 for editing compatibility. OBS has a built-in remux tool under File menu.

• How do I reduce recording file sizes?

  Lower the recording bitrate, reduce resolution, or switch to a more efficient codec like HEVC/H.265 instead of H.264. HEVC produces similar quality at roughly 40% smaller files but requires more CPU or a newer GPU encoder.

• Does streaming use storage on my computer?

  Streaming itself sends data to the platform and doesn't use local storage. However, if you enable local recording in OBS (which most streamers do), those recordings save to your disk and consume storage.