Podcast File Size Calculator

No -- File Size does not change when you switch Stereo (0=Mono, 1=Stereo) between mono and stereo. In compressed formats like MP3 and AAC, Bitrate already sets the total data rate for the whole file regardless of channel count, so stereo just splits that same budget across two channels instead of adding a second one on top. Only the Channels output itself reflects your Stereo setting.

File Size scales directly with Bitrate, so doubling it (say from 64 kbps to 128 kbps) roughly doubles File Size for the same Episode Duration. That's the core tradeoff behind bitrate choice: 64 kbps keeps voice-only shows small, while 192+ kbps for music-heavy content costs proportionally more storage and bandwidth per episode.

File Size is Bitrate multiplied by Episode Duration, so at a fixed bitrate the file size rises in direct proportion to how long the episode runs -- a 90-minute interview produces roughly three times the file size of a 30-minute episode encoded at the same settings, independent of what's actually being said in either one.

Download Time (3G) converts File Size into how many seconds a listener on a slow 1.5 Mbps mobile connection would need to fully download the episode before playback, which rises and falls with File Size exactly the way Monthly (4 eps) bandwidth does. It's a rough accessibility check for listeners without fast Wi-Fi, not a guarantee of any real network's actual throughput.