About This Tool
Understanding file sizes across different units can be confusing, especially when operating systems and storage manufacturers use conflicting standards. This File Size Converter eliminates the confusion by letting you enter a value in any unit — from Bytes all the way up to Petabytes — and instantly displaying the equivalent in every other unit at once.
The tool supports both the binary (IEC) standard used by operating systems, where 1 KiB equals 1,024 bytes, and the decimal (SI) standard used by hard drive manufacturers, where 1 KB equals exactly 1,000 bytes. Seeing both side by side helps explain why a "500 GB" hard drive shows up as roughly 465 GiB in Windows or macOS.
Whether you are a developer calculating API payload limits, a sysadmin planning storage capacity, or just trying to figure out how many photos fit on a USB drive, this converter gives you precise multi-unit breakdowns in real time. No page reload, no submission button — just type a number and watch all conversions update immediately.