Understanding File Sizes: KB, MB, and Beyond

Digital files are measured in bytes. A byte is the smallest unit — roughly equivalent to one character of text. Here is how the units scale:

1 KB (Kilobyte) = 1,024 bytes. A short paragraph of text is about 1 KB.

1 MB (Megabyte) = 1,024 KB = about 1 million bytes. A smartphone photo is typically 2–8 MB.

1 GB (Gigabyte) = 1,024 MB. A full-length movie is about 1–4 GB.

When an online form says 'file must be under 200 KB', it means your file must be smaller than 200 kilobytes. This is about one-tenth the size of a typical smartphone photo.

On Windows: Right-click the file, select Properties, and look for 'Size'.

On Mac: Right-click the file, select Get Info, and look for 'Size'.

On your phone: Open your photo gallery, select a photo, and tap Details or Info (varies by phone model).

In the FileReady tools: When you upload a file to any of our tools, the original file size is displayed automatically. After processing, you can compare the before and after sizes.

Email attachments: Most email services limit attachments to 25 MB total per email. Gmail, Outlook, and Yahoo all use this limit.

Online forms: Typically 100 KB to 2 MB per file. Government portals tend to have stricter limits (often 100–500 KB).

Social media: Instagram compresses photos automatically. Facebook accepts up to 15 MB. LinkedIn limits profile photos to 8 MB.

If your file exceeds the limit, use the Image Compressor (for photos) or the PDF Split tool (for PDFs) to reduce the size.