What bitrate hits that file size?
Check a real file's bitrate, or solve bitrate, file size, and recording time. No upload.
Decimal units (1 MB = 1,000,000 bytes), matching YouTube, Discord, and encoder readouts. Real encodes vary a few percent with container overhead.
Pure math in your browser tab. No upload, no waiting.
Presets for YouTube, Discord caps, WhatsApp, and email limits.
Solve bitrate, file size, or recording time — with audio reserved.
Got the number? Encode it here.
This tool does the math. Cutsio's compressor applies your target bitrate to real footage — right in your browser.
Common questions.
How do I check the bitrate of a video file?
Drop the file into the Check a file tab. The tool demuxes it locally and reports the overall bitrate plus separate video and audio track bitrates — nothing is uploaded.
What bitrate do I need for a target file size?
Enter your duration and target size in the Bitrate for size tab. A 60 second clip capped at 25 MB (Discord) needs about 3.33 Mbps total — the tool splits that into video and audio for you.
How big will my video file be?
Enter duration and total bitrate in the Size for bitrate tab. One minute at 8 Mbps is about 60 MB. Pick a YouTube, WhatsApp, or email preset to start from a sane value.
What bitrate should I use for YouTube?
YouTube suggests around 8 Mbps for 1080p SDR and 35–45 Mbps for 4K. Use the preset chips, then adjust for your content — grainy or high-motion footage needs more.
Does audio count toward file size?
Yes. Set your audio track (typically 128–192 kbps) and the calculator reserves it from the total, so the video portion is what your encoder should target.
Is my data uploaded anywhere?
No. The entire calculation runs in your browser tab. Nothing is sent to a server.