Video File Size Calculator
Estimate how large your screen recording or video file will be. Enter your settings and get an instant result.
Format Comparison
Same recording (1920x1080, 30fps, 5m 0s) in different formats:
Common Scenarios
How This Works
File size depends on resolution, duration, frame rate, codec, and content complexity. Screen recordings compress much better than live-action video because large areas of the screen stay static between frames.
These estimates use typical bitrates for screen recording content. Actual sizes may vary by 20-40% depending on content — recordings with lots of motion (scrolling, animations) will be larger, while mostly static content will be smaller.
Tip: H.265/HEVC and VP9 produce significantly smaller files than H.264 at the same quality. If your viewers' devices support it, prefer these newer codecs.
Most common. Good quality, wide compatibility.
Zumie exports optimized HD recordings that are smaller than you'd expect.
Stunning screen recordings with automatic zoom, beautiful backgrounds, and clean transitions. No editing needed.
Install Zumie — FreeEstimate Your Screen Recording File Size Before You Hit Record
Enter your resolution, duration, frame rate, and codec to instantly estimate how large your video file will be. Compare codecs side-by-side to pick the best format for your needs.
Features
Resolution Presets
Quickly select 720p, 1080p, 1440p, or 4K, or enter a custom resolution.
Codec Comparison
See estimated sizes for H.264, H.265, VP9, VP8, GIF, and AVI to pick the smallest format for your quality needs.
Frame Rate Options
Choose 24, 30, or 60 fps to see how frame rate affects file size.
Custom Duration
Set any duration in minutes and seconds for an accurate estimate.
Instant Results
Results update in real time as you change settings — no submit button needed.
Codec Descriptions
Each codec option includes a brief explanation of its strengths and typical use cases.
How to Use Video File Size Calculator
Choose a resolution
Select a preset (720p, 1080p, 1440p, 4K) or enter custom width and height values.
Set duration and frame rate
Enter the recording length and pick a frame rate to match your use case.
Compare codecs
Select a codec/format and instantly see the estimated file size. Switch codecs to compare.
Frequently Asked Questions
How accurate is the estimate?
The calculator uses typical bitrates for each codec. Actual file sizes vary depending on content complexity — screen recordings with static content tend to be smaller than estimated.
Which codec should I use for screen recordings?
H.264 offers the best compatibility. H.265 and VP9 produce smaller files but need more processing power. WebM (VP9) is great for web playback.
Does this tool record video?
No, this is an estimation tool only. For recording, try the Zumie screen recorder Chrome extension.
Why are GIF files so much larger?
GIF uses a simple compression algorithm with a 256-color palette. Video codecs like H.264 are far more efficient for motion content.