Video Bitrate & File-Size Estimator
Estimate video bitrate and final file size from resolution, fps, codec, motion and duration.
About this tool
Plan video encoding by estimating the bitrate and resulting file size before you export. Enter the resolution (480p–4K or explicit width/height), frame rate, codec, clip duration, audio bitrate and motion level; the tool returns a recommended bitrate, a projected file size in MB/GB, and a YouTube recommended-upload-bitrate reference. Useful for videographers, streamers and anyone budgeting storage or bandwidth.
Frequently asked questions
How do you estimate video bitrate?
We use a bits-per-pixel-per-frame heuristic (pixels x fps x ~0.07 bpp) scaled by codec efficiency and how much motion the footage has, then add the audio bitrate.
How much smaller is H.265 or AV1 than H.264?
As a rule of thumb H.265/HEVC and VP9 need roughly half the bitrate of H.264 for similar quality, and AV1 about 40%. The estimator applies these multipliers automatically.
How is the file size calculated?
File size = (video kbps + audio kbps) / 8 x duration in seconds, converted to MB and GB. It is an estimate; constant-quality (CRF) encodes can differ noticeably.