Data Size Converter Calculator

Calculator

Use the form to convert one size into many storage units. Choose decimal for drive labels and binary for system-style capacity values.

Value

From Unit

Scale Standard

Decimal Precision

Network Speed (Mbps)

Show extended unit list

Example Data Table

Input	Standard	Equivalent	Typical Use
1 GB	Decimal	1,000 MB	Drive marketing labels
1 GiB	Binary	1,024 MiB	Operating system reporting
700 MB	Decimal	0.7 GB	Compact media sizing
25 MB	Decimal	200 Mb	Email attachment planning
4.7 GB	Decimal	4,700,000,000 bytes	Disc and image storage

Formula Used

Base conversion to bytes:

Bytes = Input × Unit Factor

Decimal unit factor = 1000ⁿ

Binary unit factor = 1024ⁿ

Bits = Bytes × 8

For byte-based units, the factor uses powers of 1000 or 1024. For bit-based units, the same scale is divided by 8 because 8 bits equal 1 byte.

Transfer time uses: Seconds = Total Bytes ÷ (Speed in Mbps × 1,000,000 ÷ 8). This estimates ideal movement time without network overhead.

How to Use This Calculator

Enter the storage number you want to convert.
Select the source unit, such as MB, GB, MiB, or Tb.
Choose decimal or binary scale based on your use case.
Set the decimal precision for cleaner reporting.
Add optional network speed to estimate transfer time.
Submit the form to display results above the form.
Download the conversion table as CSV or PDF if needed.

Frequently Asked Questions

1. What is the difference between GB and GiB?

GB uses powers of 1000. GiB uses powers of 1024. Storage vendors often show GB, while operating systems commonly report GiB-style capacity values.

2. Why do bit and byte values differ?

A byte contains 8 bits. Network speeds often use bits, while file sizes usually use bytes. That difference changes both labels and numeric totals.

3. Which standard should I choose?

Choose decimal for drive packaging, ISP marketing, and many vendor specifications. Choose binary for memory, system tools, and software-reported storage values.

4. Can this calculator estimate transfer time?

Yes. Enter a network speed in Mbps. The tool estimates ideal transfer time using total bytes and theoretical throughput, excluding latency and protocol overhead.

5. Why are my device values smaller than advertised?

Manufacturers usually advertise decimal sizes. Many systems interpret capacity with binary scaling. The same physical storage then appears numerically smaller on screen.

6. Is this calculator useful for backups?

Yes. It helps compare file sizes, estimate archive growth, check target capacity, and forecast transfer duration before starting backup or migration work.

7. What does the extended unit list include?

It adds more bit and byte sizes, including kilobits, kibibits, petabytes, and pebibytes. Use it when you need broader technical comparisons.