YouTube Video File Size & Bitrate Calculator
Plan exports and uploads by solving for file size, duration, or video bitrate with transparent decimal units.
Video parameters
Choose the value you want to solve for.
Your planning estimate
Decimal storage units are used.
How the calculator works
Select the value you want to calculate, then enter the remaining duration, bitrate, and size values. Video and audio bitrate are combined before conversion from bits to bytes.
This is a planning estimate. Variable bitrate exports and container overhead mean the final encoded file may differ.
bytes = (video kbps + audio kbps) × seconds × 1000 ÷ 8Unit convention
1 GB = 1,000 MB = 1,000,000,000 bytes.
Frequently asked questions
How is video file size estimated?+
File size is total video and audio bitrate multiplied by duration, divided by eight to convert bits into bytes.
Why is my exported file a different size?+
Variable bitrate encoding, scene complexity, codec efficiency, metadata, and container overhead can all change the final size.
Does this calculator use GB or GiB?+
It uses decimal SI storage units: one GB is 1,000,000,000 bytes. This matches the units commonly shown by storage providers.