File Size Calculator
Estimate raw file size from parameters - image dimensions and color depth, or audio/video bitrate and duration.
Choose image or audio/video mode and enter the relevant parameters - this tool estimates the resulting raw file size.
Decimal uses 1000-based multiples (kB/MB/GB/TB); Binary uses 1024-based multiples (KiB/MiB/GiB/TiB). Switch the convention to see both interpretations - the same raw byte count is used, only the unit labels/divisors change.
This estimates uncompressed/raw size based on the math - real compressed files (JPEG, MP4, MP3) are typically much smaller due to compression, which this calculator doesn't attempt to simulate.
How This Differs from a Unit Converter
Rather than converting an already-known size between units (see the Byte Converter for that), this tool estimates what a file's size will be from its underlying parameters - useful when planning before you've actually created the file.
How to Use It
- Choose Image mode (enter width, height, and color depth) or Audio/Video mode (enter bitrate and duration).
- View the estimated raw file size.
Important Notes
This calculates uncompressed size based on raw math (width × height × bytes-per-pixel for images; bitrate × duration for audio/video) - actual compressed file formats (JPEG, PNG, MP4, MP3) apply compression that significantly reduces real file size, which varies by content and isn't something this calculator can predict.