Video File Size Calculator
Quickly estimate your video’s file size based on duration and bitrate. Plan your exports, storage, and uploads with confidence no surprises, just accurate sizing.
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FAQs
What Does This Video File Size Calculator Do?
It estimates the final file size of a video based on its duration, video bitrate, and audio bitrat helping you plan for storage, uploads, or exports.
What Is Bitrate and Why Does It Matter?
Bitrate is the amount of data used per second of video or audio. Higher bitrates generally mean better quality but result in larger file sizes.
What Should I Enter for Video and Audio Bitrate?
You can enter the bitrates used in your export or encoding settings. Common values: • Video Bitrate: 5000–8000 Kbps (for 1080p) • Audio Bitrate: 128–320 Kbps (for standard audio)
Can I Use This for Long-Form Videos Like Webinars or Courses?
Absolutely. Just enter the video’s total duration in minutes along with the appropriate bitrates to get a reliable size estimate.
What Units Are the Bitrate Values In?
The calculator uses Kbps (kilobits per second) for both video and audio bitrate. Make sure your input is in Kbps, not Mbps or KB/s.
What Does Total Bitrate Mean in the Result?
Total bitrate is the sum of your video and audio bitrate. This value is used to calculate the final file size.
How Accurate Is the File Size Estimate?
The estimate is very close to actual size, assuming constant bitrate encoding. Variable bitrate (VBR) may cause slight differences.
Why Do I Need to Know the File Size Before Exporting?
Knowing the file size helps you plan for upload limits, device storage, cloud capacity, or delivery constraint especially useful when uploading to platforms with size caps.
Can I Use This for 4K or Lower-Resolution Videos?
Yes! Just input the correct video and audio bitrate for your resolution. Higher resolutions typically require higher bitrates for good quality.
Will This Calculator Work Offline on Mobile?
Yes, the calculator is designed to run fully offline and is optimized for mobile devices no internet connection needed after it loads.
