Data Size Converter
Convert between bytes, KB, MB, GB, TB, and binary units
Read the full guidetools.data-size-converter.decimalVsBinary
Decimal (SI Units)
tools.data-size-converter.decimalDesc
- 1 KB = 1,000 bytes
- 1 MB = 1,000 KB = 1,000,000 bytes
- 1 GB = 1,000 MB = 1,000,000,000 bytes
- 1 TB = 1,000 GB
Binary (IEC Units)
tools.data-size-converter.binaryDesc
- 1 KiB = 1,024 bytes
- 1 MiB = 1,024 KiB = 1,048,576 bytes
- 1 GiB = 1,024 MiB = 1,073,741,824 bytes
- 1 TiB = 1,024 GiB
Why does my drive show less space? A "1 TB" drive (1,000,000,000,000 bytes) shows as ~931 GiB in your OS because it uses binary calculation.
tools.data-size-converter.commonSizes
Calculate digital storage requirements. Convert between decimal (MB/GB) and binary (MiB/GiB) units used by hard drive manufacturers and operating systems.
Storage manufacturers usually use the Decimal system (base 10, where 1 KB = 1000 bytes). However, Operating Systems like Windows use the Binary system (base 2, where 1 KiB = 1024 bytes). This is why a 500GB drive shows less space when plugged in.
Web Development
Optimizing image or video sizes for faster page loads.
IT Planning
Calculating server storage needs or cloud backup costs.
Our tool allows you to toggle between standard (SI) units and binary (IEC) units so you can match the calculation to your specific needs.
| Unit | Decimal (Base 10) | Binary (Base 2) |
| Kilobyte | 1,000 Bytes | 1,024 Bytes (KiB) |
| Megabyte | 1,000,000 Bytes | 1,048,576 Bytes (MiB) |
| Gigabyte | 10^9 Bytes | 2^30 Bytes (GiB) |
Uses BigInt support in modern browsers for accurate large-scale conversions (PB, EB).