Why does my drive show less space than advertised?

Drive manufacturers typically use 1000-based (decimal) units for marketing, while operating systems display capacity using 1024-based (binary) units — this mismatch is exactly why a "1TB" drive shows less than 1TB in your file explorer.

What's the difference between a bit and a byte?

A byte is 8 bits — bits are typically used for network speeds (like megabits per second), while bytes are typically used for file and storage sizes (like megabytes).

Why 1024 instead of 1000 for these conversions?

Binary computing naturally works in powers of 2, and 1024 (2 to the power of 10) is the closest power of 2 to 1000 — which is why operating systems traditionally use 1024-based units for file sizes, even though the units are named the same as their 1000-based counterparts.

How large is a petabyte in more familiar terms?

A petabyte is 1,024 terabytes — for context, that's roughly equivalent to hundreds of thousands of high-definition movies, illustrating just how large a jump each storage unit represents.

Measurement & Unit Converters Cluster

Data Storage Converter

Convert between bits, bytes, KB, MB, GB, TB and PB.

TL;DR: Data Storage Converter is a free, browser-based tool that lets you convert between bits, bytes, KB, MB, GB, TB and PB.

Value

From

Understanding the Data Storage Converter

The Data Storage Converter converts measurements between metric (SI), imperial, and specialized scientific unit standards with high-precision conversion factors.

How It Works

Enter the numeric quantity you want to convert.
Select the source unit from the dropdown list.
Select the target unit you wish to convert into.
View the exact converted value, scientific notation, and mathematical conversion formula.

Mathematical Formula & Methodology

Here is the standard mathematical equation used to calculate this result accurately:

1 \text{ Byte} = 8 \text{ bits}, \quad 1 \text{ KB} = 1,024 \text{ Bytes}, \quad 1 \text{ MB} = 1,024 \text{ KB}, \quad 1 \text{ GB} = 1,024 \text{ MB}, \quad 1 \text{ TB} = 1,024 \text{ GB}

Formula Variables Explained:
Converts digital data size across Bits, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, and Petabytes in binary (1024) and decimal (1000) base.

Step-by-Step Worked Example

500 Gigabytes (GB) = 512,000 Megabytes (MB) = 0.488 Terabytes (TB).

How to Get the Best Results

Exact Standard Factors: Uses international bureau standards (e.g. 1 inch = exactly 25.4 mm; 1 pound = 0.45359237 kg).
Scientific Notation: Automatically switches to scientific notation ( $1.25 \times 10^6$ ) for very large or microscopic values.
Multi-Unit Conversion: View simultaneous conversions across all related units in the reference table.

Related Guides & Tutorials

Text Case Converter Guide — Learn in-depth concepts, best practices, and expert tips.

100% Client-Side Privacy Guarantee

All processing runs locally inside your browser using JavaScript and HTML5 APIs. Your data, files, and inputs are never uploaded to any remote server. Complete privacy by design.

Frequently Asked Questions

: Drive manufacturers typically use 1000-based (decimal) units for marketing, while operating systems display capacity using 1024-based (binary) units — this mismatch is exactly why a "1TB" drive shows less than 1TB in your file explorer.
: A byte is 8 bits — bits are typically used for network speeds (like megabits per second), while bytes are typically used for file and storage sizes (like megabytes).
: Binary computing naturally works in powers of 2, and 1024 (2 to the power of 10) is the closest power of 2 to 1000 — which is why operating systems traditionally use 1024-based units for file sizes, even though the units are named the same as their 1000-based counterparts.
: A petabyte is 1,024 terabytes — for context, that's roughly equivalent to hundreds of thousands of high-definition movies, illustrating just how large a jump each storage unit represents.

Cite This Tool

Referencing this tool in a paper, article, or bibliography? Copy a ready-made citation below.

NexLove.org. (2026). Data Storage Converter [Software]. https://nexlove.org/tools/data-storage-converter.html

“Data Storage Converter.” NexLove.org, 2026, nexlove.org/tools/data-storage-converter.html.

NexLove.org (2026) Data Storage Converter. Available at: https://nexlove.org/tools/data-storage-converter.html (Accessed: 2026).

@misc{nexlove_data_storage_converter,
  title = {Data Storage Converter},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/data-storage-converter.html}
}

Embed This Tool

Add the live Data Storage Converter tool to your own website with this snippet — it loads the real, working tool in an iframe, not a static screenshot.

<iframe src="https://nexlove.org/embed/data-storage-converter.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="Data Storage Converter — NexLove.org" loading="lazy"></iframe>

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