Bitrate Calculator
Calculate combined audio/video bitrates, fit targets to file sizes, and verify streaming requirements.
Video Settings
Audio Settings
How Video Bitrate & File Size Are Calculated
Raw (uncompressed) video bitrate is computed as Width × Height × Frame Rate (FPS) × Bit Depth × Color Channel Factor (usually 3). Modern compression standards shrink this stream significantly: AVC/H.264 compresses by roughly 20:1, HEVC/H.265 by 40:1, and newer codecs like AV1 by up to 50:1.
File size is the integration of total combined bitrate (Video Bitrate + Audio Bitrate) over time: File Size = (Combined Bitrate in bps / 8) × Duration in seconds. Using the bidirectional "Fit to Size" equation, you can invert this relationship: Allowable Bitrate = Target File Size in bits / Duration. This tool lets you estimate streaming ingestion caps, fits videos to target files, and plans network requirements client-side.
Private & free — this tool runs entirely in your browser.