~/devtools / data-size
tool::data-size

Data Size
Converter

Convert between B, KB, MB, GB, TB, and PB in real time. Supports both SI (base-1000) and binary (base-1024) modes.

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// about this tool

About Data Size Converter

Data storage is measured in bytes (B), scaling up through KB, MB, GB, TB, and PB. The SI standard defines 1 KB as 1,000 bytes, but computers internally use powers of two — 1 KiB equals 1,024 bytes. This discrepancy causes confusion in file sizes, disk capacities, and memory specifications.

This tool lets you pick SI mode (KB, MB, GB…) or binary mode (KiB, MiB, GiB…) and converts all units from B to PB in real time. Entering a value in any field instantly updates every other unit, so you always get accurate conversions without manual calculations.

Whether you're validating upload limits, comparing cloud storage tiers, interpreting OS-reported disk sizes, or configuring log rotation thresholds, this converter gives you instant answers. All calculations run client-side — no data is sent to a server.

Common Use Cases
  • ▸Converting file upload/download limits (e.g., 10 MB) to bytes for API validation
  • ▸Comparing AWS S3 or GCP Storage billing tiers denominated in GB
  • ▸Understanding the GB vs GiB discrepancy when buying RAM or SSDs
  • ▸Checking Docker image and container layer sizes
  • ▸Setting log rotation size thresholds in MB or GB
Frequently Asked Questions
Q. What is the difference between 1 GB and 1 GiB?
1 GB (gigabyte) equals 1,000,000,000 bytes under the SI standard. 1 GiB (gibibyte) equals 1,073,741,824 bytes — about 7.4% larger. Hard drive manufacturers use GB, but operating systems typically display capacity in GiB, which is why a '1 TB' drive shows as ~931 GiB in your OS.
Q. Which mode should I use?
Use binary mode (KiB/MiB/GiB) when dealing with computer memory, file systems, or OS-reported sizes. Use SI mode (KB/MB/GB) for network speeds (Mbps), consumer product specifications, and cloud storage billing, where base-1000 is the norm.
Q. Are there units larger than PB?
Yes — above petabytes come exabytes (EB, 10^18), zettabytes (ZB, 10^21), and yottabytes (YB, 10^24). These are rarely encountered in everyday development or operations, so this tool covers up to PB/PiB.