GluePuddingTool

Screen Recording File Size Estimator

Estimate screen recording file size before you record: choose resolution, frame rate, duration, content type and codec to see compressed size, raw size, a codec comparison (H.264/H.265/AV1) and storage advice.

FreeOnline Tool
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How to Use

  1. Choose a resolution (1080p, 720p, 4K or custom width/height), frame rate and duration in minutes.
  2. Pick a content type: documents, static desktop, browsing, coding, video or games - each has a different compression ratio.
  3. Choose the codec: H.264 (most compatible), H.265/HEVC (more efficient) or AV1 (most efficient).
  4. Review the estimated file size, raw size, effective compression ratio and the codec comparison table live.
  5. Or load a preset: 1-hour Zoom meeting, 30-minute tutorial or 15-minute product demo.

Features

  • 720p/1080p/4K presets plus a fully custom resolution.
  • Six content types with typical compression ratios: static desktop 150:1, documents 120:1, browsing 100:1, coding 90:1, video 60:1 and games 30:1.
  • Raw uncompressed size and compressed estimate shown side by side with the effective ratio.
  • H.264/H.265/AV1 comparison table with the percentage saved vs H.264.
  • Storage advice scales with size: local storage, cloud, compress first, or reduce resolution/frame rate.
  • One-click presets for meetings, tutorials and demos.

Use Cases

Pre-recording planning
Pick resolution and codec that fit your target file size before you start recording.
Disk check
Know the size of a 1-hour recording before pressing record, not after.
Platform limits
Reverse-engineer the settings needed to fit upload limits of a specific platform.
Archiving
Estimate storage cost for a library of recorded courses or meetings.
Codec choice
Compare H.264 vs AV1 sizes before committing to a workflow.

FAQ

How accurate is the estimate?
It is a general estimate based on typical compression ratios per content type; the real size depends on scene complexity and encoder settings.
How is the raw size computed?
Width x height x 3 bytes (RGB) x frame rate x seconds.
Why is a game recording larger than a document one?
Fast-moving, detailed scenes compress much less: 30:1 for games vs 150:1 for static desktops.
Is AV1 always smaller than H.264?
The model estimates roughly half the size, but encoding is slower and player support is more limited.
How do I use a custom resolution?
Pick Custom in the resolution list and enter the width and height, e.g. 2560x1440.