Video File Size Calculator
Estimate how big a video file will be from its length, resolution, frame rate, and codec - or from an exact bitrate. Plan storage, upload limits, and recordings before you export or record.
Using a typical video bitrate of 8.0 Mbps for this combination. Real exports vary with the footage and encoder settings.
3.66 GB
Per Hour of Video
8.13 Mbps
Total Bitrate (video + audio)
Uses the frame rate, codec, and audio settings above.
Recommended Settings
Pro Tips
- •File size is simply total bitrate multiplied by length - doubling either one doubles the file
- •Higher resolution and 60 fps both raise the bitrate you need, which is why 4K at 60 fps files are many times larger than 1080p at 30 fps
- •H.265 (HEVC) and AV1 can look similar to H.264 at a lower bitrate, so the same footage often ends up noticeably smaller
- •Use Number of Videos to estimate storage for a batch of exports or several cameras recording at once
Most Popular
Most people check 1080p at 30 fps with H.264 and 128 kbps audio to see how big a 10 to 60 minute video will be
When to Use This Tool
Work out how much disk space a screen recording, stream archive, or camera capture will use.
See whether a video will fit under an email, chat, or platform upload limit before you export.
Multiply a per-camera estimate across several cameras to size a recorder or NAS.
Compare resolutions side by side to see what each step up in quality costs in file size.
How It Works
Enter the length of the video in hours, minutes, and seconds
Pick a resolution, frame rate, and codec for a typical bitrate - or enter an exact bitrate
Optionally add an audio track and a number of videos
The tool multiplies total bitrate by length and converts the result to a readable size
100% Private
Files never leave your device. All processing happens locally in your browser.
Lightning Fast
Powered by Client-side JavaScript arithmetic for optimal performance on modern browsers.
Open Source
Built with verified, open-source libraries. Fully transparent.
Frequently Asked Questions
How do I calculate video file size?
Multiply the total bitrate (video plus audio) by the video's length in seconds, then divide by 8 to convert bits to bytes. This calculator does that for you and shows the result in MB, GB, or TB.
How big is a 1080p video per minute?
At a typical 8 Mbps video bitrate plus 128 kbps audio, a 1080p 30 fps H.264 video is roughly 60 MB per minute, or about 3.6 GB per hour. Real files vary with the content and encoder settings.
Why does my real file size differ from the estimate?
The presets are typical averages. Encoders usually vary the bitrate with how busy each scene is, and the container, audio tracks, and chosen quality settings all shift the final size. Use By Bitrate if you know your exact export bitrate.
How is this different from the Bitrate Calculator?
The Bitrate Calculator works backward from a target file size to the bitrate you need. This tool starts from resolution, frame rate, and codec to estimate the size, and compares several resolutions at once.
Where do the preset bitrates come from?
They follow commonly published upload and streaming recommendations for H.264 standard dynamic range video. HEVC and AV1 are scaled down using a rough rule of thumb, so treat them as estimates rather than guarantees.
Is my data sent to a server?
No. Everything is calculated locally in your browser - nothing you enter is transmitted anywhere.
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