File Size Converter
Convert file sizes between decimal and binary units when you need clean storage numbers for planning, delivery, and support.
Why size conversions matter
File sizes get reported differently by operating systems, cloud vendors, browser downloads, and storage planning sheets. Converting between units helps teams compare like with like.
Decimal and binary systems
Decimal units
Vendors often use powers of 1000 in drive capacities and bandwidth documents.
- 1 KB = 1,000 bytes
- 1 MB = 1,000 KB
- 1 GB = 1,000 MB
Binary units
Operating systems and engineering tools often calculate around powers of 1024.
- 1 KiB = 1,024 bytes
- 1 MiB = 1,024 KiB
- 1 GiB = 1,024 MiB
Useful operating scenarios
Storage purchasing
Check whether quoted drive capacity lines up with what workloads report after formatting and replication.
File upload limits
Translate product limits into the same unit used by backend validation rules and reverse proxies.
Download documentation
Keep support copy aligned with what users see in browsers, desktop operating systems, and cloud consoles.
Capacity reviews
Move between bytes, megabytes, and gibibytes quickly during incident triage or storage forecasts.
Quick examples
- 500 MB is about 0.49 GiB.
- 1 TB is about 931.32 GiB.
- 2 GiB is 2,048 MiB.
- 25 MB photo archives add up quickly when retained for long periods.