Video File Size Calculator
Estimate video file sizes based on duration and bitrate.
Calculate Maximum Bitrate to Fit a Target File Size
3,205 Kbps
3.21 Mbps
⚠️ Important Distinction: Mbps vs. MB/s (Bits vs. Bytes)
Internet service providers (ISPs) quote download and upload bandwidth in Megabits per second (Mbps with a lowercase ‘b’). However, browsers, game launchers (Steam, Epic), and operating systems report file sizes and download speeds in Megabytes per second (MB/s with a capital ‘B’).
For example, a 100 Mbps internet connection yields a theoretical maximum download speed of 12.5 MB/s (100 ÷ 8). With realistic 5%–10% TCP/IP protocol overhead, expect real transfer rates around 11.5 MB/s.
How It Works
- Calculates file size based on combined video and audio stream bitrates.
Practical Example
Frequently Asked Questions
Should I reserve bitrate for audio?
Yes, typically 128 kbps or 192 kbps is reserved for stereo audio.
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