Video File Size Calculator
Estimate how big an export will be from its bitrate and length, or find the bitrate that fits a size limit. Presets use YouTube’s recommended upload bitrates.
Video file size calculator
Size = (video + audio bitrate) × duration ÷ 8
10 min at 8 Mbps video + 384 kbps audio ≈ 628.8 MB
1 GB = 1,000,000,000 bytes. Variable-bitrate exports land near, not exactly on, these numbers.
Presets from YouTube Help: recommended upload encoding settings (verified 2026-10-16). Ranged values use the midpoint.
What is a Video File Size Calculator?
A video file size calculator multiplies total bitrate (video plus audio) by duration and divides by 8 to get bytes. Editors use it to plan uploads, storage and delivery limits before they export.
How to calculate video file size
File size (bytes) = (video bitrate + audio bitrate) in bits per second × duration in seconds ÷ 8. A 10-minute 1080p export at YouTube’s recommended 8 Mbps with 384 kbps stereo audio is about 629 MB.
Planning the upload too? The upload time calculator turns the file size and your connection speed into upload time, and the video compressor shrinks a file to a target size in the browser.
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