Data Size Converter
Type a value once and read it in every data unit. Binary (1024) is the default — 1 GB = 1024 MB, the way your operating system counts — and a one-click switch gives strict decimal SI (1 GB = 1000 MB).
How to use
- Enter the number you want to convert.
- Keep Binary (1024) — the default — or switch to Decimal (1000) for strict SI.
- Pick the unit your number is expressed in and read the equivalent value in all six units.
Frequently asked questions
Why does this converter say 1 GB = 1024 MB?
Because Binary (1024) is the default standard here — it is how operating systems and most software count: each step multiplies by 1,024 (1 GB = 1024 MB, 1 MB = 1024 KB, 1 TB = 1024 GB). Technically these are the units standards call KiB/MiB/GiB, but this tool labels them KB/MB/GB the way everyday software writes them. If you need the strict SI decimal standard instead, flip the switch to Decimal (1000).
Why do drive makers and operating systems disagree?
Mixed usage is an industry-wide habit: storage is manufactured and sold in decimal gigabytes (1 GB = 1,000,000,000 bytes — that is what the label on the box means), while operating systems divide by 1,024 at each step, so the same drive reads as roughly 0.931 "GB" in binary units. Both numbers describe the same bytes. This converter defaults to the binary view and shows the decimal equivalent right under the table so nothing is hidden.
How precise are the conversions?
Every unit is an exact integer number of bytes, and all conversions are plain divisions by those factors — no rounding is applied to the math itself. Results are displayed with up to 8 significant digits, and extreme magnitudes switch to scientific notation.
Which standard should I quote file sizes or bandwidth in?
Match the convention of your audience: for RAM, file listings and what your OS reports, binary (1024) is the norm; for drive capacities, network bandwidth and strict SI specs, decimal (1000) is the norm. When precision matters — invoices, benchmarks, product specs — state the standard explicitly instead of assuming.
Does anything leave my browser?
No. The conversion is a few multiplications and divisions computed locally in your tab; no input is uploaded or stored.