💾 Free Data Storage Converter

The Data Storage Converter is a free online tool for converting digital file sizes between bytes (B), kilobytes (KB), megabytes (MB), gigabytes (GB), and terabytes (TB). It is essential when checking file sizes, planning storage purchases, estimating download times, or comparing cloud storage plans. You can switch between decimal (1 MB = 1,000,000 B) and binary (1 MiB = 1,048,576 B) conventions, and everything runs locally in your browser.

The tool supports two conventions. In decimal (SI) mode, 1 KB = 1000 B and 1 MB = 1000 KB, which is how storage manufacturers label devices. In binary (IEC) mode, 1 KiB = 1024 B and 1 MiB = 1024 KiB, which is how operating systems report file sizes. The converter uses the byte as the base unit and applies the appropriate factor of 1000 or 1024 depending on the selected mode.

1. Enter the storage value you want to convert.
2. Select the input unit (B, KB, MB, GB, or TB) in the first dropdown.
3. Select the target unit in the second dropdown, choose decimal or binary mode, and click Convert.
4. The converted size is displayed instantly with a summary of the calculation.

Why does my hard drive show less space than advertised?

Manufacturers use decimal units (1 GB = 1,000,000,000 B) while operating systems display binary units (1 GiB = 1,073,741,824 B). The difference explains the apparent gap — this converter can show you both.

What is the difference between GB and GiB?

GB (gigabyte) uses the decimal factor of 1,000,000,000 bytes; GiB (gibibyte) uses the binary factor of 1,073,741,824 bytes. This tool supports both conventions.

Is this data converter accurate?

Yes. It applies the exact factors for both the decimal and binary conventions, so results match what you see in file managers and device specifications.

A rough guide: 1000 photos from a modern smartphone ≈ 3–4 GB, and one hour of HD video ≈ 2–4 GB. When buying storage, remember that a '1 TB' drive shows about 931 GiB in your operating system.