Convert between bytes, kilobytes, megabytes, gigabytes, and terabytes instantly — useful for checking upload limits, comparing storage options, planning backups, or understanding how large a file is across different units. Runs entirely in your browser with no data sent anywhere.
In the decimal system (used by storage manufacturers), 1 MB = 1,000,000 bytes. In the binary system (used by operating systems), 1 MiB (mebibyte) = 1,048,576 bytes. This discrepancy is why a 1 TB drive shows as slightly less in Windows or macOS.
1 GB = 1,000 MB in decimal, or 1 GiB = 1,024 MiB in binary. Most everyday contexts use the decimal definition.
Drive manufacturers use decimal (1 GB = 1,000 MB) while operating systems report in binary (1 GiB = 1,024 MiB). A 1 TB drive shows as approximately 931 GiB in Windows.
Email attachment limits (typically 10-25 MB) use decimal megabytes. Enter the limit in MB and convert to bytes if needed for precise comparisons.
No. All conversions happen in your browser with no server communication.
Uses binary units (1 KB = 1024 bytes).