Video File Size Calculator
Estimate video file size from resolution, codec, bitrate and duration — or find the bitrate that hits a target size, with storage capacity hints.
File size at common bitrates
| Bitrate | Typical use | Size for your duration |
|---|---|---|
| – | ||
What fits on common storage
| Storage | Capacity | Footage at this bitrate |
|---|---|---|
| – | ||
About Video File Size Calculator
The video file size calculator estimates how large a video file will be from its bitrate and duration. Pick a resolution, frame rate and codec preset — from 480p H.264 to 8K AV1 or ProRes 422 — to get a realistic suggested bitrate, or type your own video and audio bitrates, set the duration, and the estimated file size updates live.
File size follows directly from bitrate: size = (video bitrate + audio bitrate) × duration ÷ 8. The tool breaks the result into video data, audio data, size per minute and size per hour, and a reference table shows how big your clip would be at every common bitrate from SD streaming up to 8K.
The reverse mode answers the other everyday question: what bitrate should I encode at to hit a target file size? Enter the size limit and duration and it computes the required video bitrate after reserving room for the audio track. Storage hints show how many minutes of footage fit on common memory cards, a DVD or a Blu-ray at your current settings.
How to use Video File Size Calculator
- Choose a resolution, frame rate and codec to get a suggested bitrate, or switch to manual and enter your own video bitrate.
- Pick an audio bitrate — 128 or 192 kbps covers most stereo tracks — or select no audio.
- Enter the video duration in hours, minutes and seconds.
- Read the estimated file size, with the video/audio breakdown and per-minute and per-hour figures.
- Need to hit a size limit? Switch to the target-size mode and read the bitrate you should encode at.