Convert file sizes instantly between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes. Decimal (1000) and binary (1024) prefixes supported. Pure client-side.
Convert file sizes instantly between any digital storage units. Supports both decimal (SI) prefixes where 1 KB = 1000 bytes, and binary (IEC) prefixes where 1 KiB = 1024 bytes. All calculations happen in your browser — no data is sent to any server.
KB (kilobyte) uses decimal prefixes where 1 KB = 1000 bytes. KiB (kibibyte) uses binary prefixes where 1 KiB = 1024 bytes. Hard drive manufacturers typically use decimal, while operating systems often display binary sizes.
In decimal: 1 GB = 1000 MB. In binary: 1 GiB = 1024 MiB. Simply enter the value, select the from/to units, and the tool will calculate instantly.
Hard drive manufacturers use decimal (1 TB = 1,000,000,000,000 bytes), but operating systems often display in binary (1 TiB = 1,099,511,627,776 bytes). So a 1TB drive appears as about 931 GiB in Windows.
Yes. This tool supports values up to petabytes (PB) and beyond. There is no practical limit since all calculations are done locally in your browser using JavaScript.