The File Size Calculator helps you estimate video file size before rendering. Enter your target bitrate, duration, and resolution to get an accurate file size prediction. Use this to plan storage or ensure your video meets platform upload limits.
The formula is simple: File Size (MB) = (Bitrate in Mbps × Duration in seconds × 8) / 8. The resolution presets provide typical bitrate ranges for each quality level.
Frequently Asked Questions
Q: What is a good bitrate for 1080p video?
What is a good bitrate for 1080p video? For standard 1080p (30fps), 8-15 Mbps is recommended. For 60fps, use 12-20 Mbps. YouTube accepts up to 50 Mbps for 1080p.
Q: How does resolution affect file size?
How does resolution affect file size? Doubling resolution quadruples the pixel count. A 4K video at the same bitrate will have lower quality per pixel than 1080p. Increase bitrate by 2-4x for 4K.
Q: What is the difference between Mbps and MB/s?
What is the difference between Mbps and MB/s? Mbps (megabits per second) measures data rate. MB/s (megabytes per second) measures file size. 1 byte = 8 bits, so 10 Mbps = 1.25 MB/s.
Q: Can I use this for live streaming bitrate planning?
Can I use this for live streaming bitrate planning? Yes. For live streaming, use CBR (constant bitrate) encoding. Recommended bitrates: 720p at 3-5 Mbps, 1080p at 5-10 Mbps.