Data Storage Converter
Convert data storage and file sizes between bits, bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes — plus binary units (kibibytes, mebibytes, gibibytes). Useful for developers, IT professionals, and anyone comparing storage specs.
Frequently Asked Questions
Why does my 1TB hard drive show less than 1TB on my computer?+
Storage manufacturers use decimal (1 KB = 1,000 bytes), but operating systems use binary (1 KiB = 1,024 bytes). A "1 TB" drive has 1,000,000,000,000 bytes = 931 GiB as reported by your OS. The difference grows at larger sizes: a "4 TB" drive shows as ~3.64 TiB.
What is the difference between KB and KiB?+
KB (kilobyte) = 1,000 bytes in the SI/decimal system. KiB (kibibyte) = 1,024 bytes in the binary/IEC system. The IEC introduced KiB, MiB, GiB etc. in 1998 to eliminate ambiguity. Most consumer context uses "KB = 1,024 bytes" colloquially — but technically KB should mean 1,000 bytes.
How many GB is a typical movie or photo?+
Typical file sizes: MP3 song ~3–5 MB, HD photo ~3–8 MB, Full HD movie ~4–8 GB, 4K movie ~40–100 GB, Blu-ray movie ~25–50 GB, 1-hour Zoom recording ~200–400 MB, uncompressed RAW photo ~20–40 MB.