About Video Bitrate & File Size Calculator
Calculate target video and audio bitrates to ensure encoded files stay under strict upload ceilings (e.g. Discord 8MB/25MB/50MB, Gmail 25MB, WhatsApp 16MB) or estimate file size given bitrate.
Key Capabilities & Features
- Discord 8MB, 25MB, 50MB presets & Gmail 25MB limits
- Audio bitrate headroom deduction (128kbps, 192kbps, 320kbps)
- Target bitrate to file size bi-directional solver
- FFmpeg ready CLI flags and video encoder guidance
How to Use Video Bitrate & File Size Calculator
Set Target File Size
Choose a standard preset (e.g., Discord 25MB) or enter a custom megabyte limit.
Enter Media Duration
Specify the total length of your video clip in minutes and seconds.
Copy Bitrate Parameters
Use the calculated video bitrate and audio overhead settings in HandBrake, Premiere, or FFmpeg.
Privacy & In-Browser Execution Guarantee
Pure in-memory bitrate calculation with zero data upload.
Frequently Asked Questions
How do I calculate video bitrate for Discord 25MB limit?
Deduct audio bitrate (typically 128 kbps) from total available bandwidth: Total Megabits = 25MB * 8 = 200 Mb. Divide by duration in seconds, then subtract audio bitrate to get target video bitrate.
What video bitrate is recommended for 1080p 60fps streaming?
YouTube and Twitch recommend 6,000 kbps to 8,000 kbps for 1080p 60fps video with 160 kbps AAC stereo audio.