Audio file size calculator
Work out how big an audio file will be — either for compressed formats like MP3 and AAC (from the bitrate) or for uncompressed PCM like WAV and AIFF (from sample rate, bit depth and channel count).
Compressed audio uses bitrate × 1000 × seconds ÷ 8. Uncompressed PCM uses sample rate × bit depth × channels × seconds ÷ 8. Pick a mode, enter your numbers, and the estimate updates instantly — all in your browser.