Uncompressed Audio File Size Calculator

The bitrate in bits per second equals sample rate times bit depth times channels. Multiply that by the duration in seconds and divide by 8 to get bytes, since a byte holds 8 bits.

CD audio is 44100 Hz, 16-bit and stereo, so 44100 times 16 times 2 equals 1,411,200 bits per second, or 1411.2 kbps. That is the raw uncompressed rate before any codec touches it.

No. This is the uncompressed PCM size, the same as a WAV or AIFF file. Lossy formats such as MP3 and AAC are far smaller because they discard data to hit a target bitrate.

The calculator uses binary megabytes, where one MB is 1024 times 1024 bytes. That matches how Windows and many tools report a file's size on disk, so the estimate lines up with what you see.

No. A standard WAV header is only a few dozen bytes and is tiny next to the sample data, so the estimate reflects the raw audio itself. Add roughly 44 bytes if you need the exact on-disk figure.

Sample rate offers 44100, 48000, 88200, 96000 and 192000 Hz, and bit depth offers 8, 16, 24 and 32 bits. Doubling either value doubles the bitrate and the resulting file size.

Size scales directly with channel count. A 6-channel 5.1 mix is three times the size of the same mono clip, and an 8-channel 7.1 mix is eight times a mono clip, all else being equal.

Yes. The duration field accepts decimals, so 0.5 or 90.25 seconds both work. The byte count is rounded to six decimals internally and shown as whole bytes and megabytes.

No. The math runs entirely in your browser as you type, so nothing about your recording settings is uploaded. The tool also powers a JSON API for the same calculation if you need it in a script.