Data Storage Converter
Convert between bits, bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes.
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How to use this calculator
- 1
Enter the data size value you want to convert.
- 2
Select the unit you are converting from (e.g. gigabytes).
- 3
Select the target unit (e.g. megabytes).
- 4
The result is calculated instantly.
Frequently asked questions
How many megabytes are in a gigabyte?
One gigabyte (GB) equals 1,024 megabytes (MB) in binary (base-2), which is how computers measure storage. Some manufacturers use 1 GB = 1,000 MB (decimal) for marketing purposes.
How many bytes are in a megabyte?
One megabyte equals 1,048,576 bytes (2²⁰) in binary. In decimal (SI), 1 MB = 1,000,000 bytes.
What is the difference between GB and GiB?
GB (gigabyte) is ambiguous but often used to mean 10⁹ bytes (1,000,000,000). GiB (gibibyte) is precisely 2³⁰ bytes (1,073,741,824). Operating systems often report sizes in GiB but label them GB, which is why a "1 TB" drive shows as less than 1,000 GB on your computer.
How many GB is 1 TB?
One terabyte equals 1,024 gigabytes (binary) or 1,000 gigabytes (decimal/SI). Hard drive manufacturers use the decimal definition, so a 1 TB drive contains 1,000 GB in the manufacturer's labelling.
How many bits are in a byte?
There are exactly 8 bits in one byte. This is a fixed standard in computing and networking.
Data storage units explained
How to use the data storage
Use this data storage to onvert between bits, bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes. Enter your values above and get your result in seconds. The tool is free, works on all devices, and keeps your data private — nothing is stored or shared.
How the data storage works
The data storage converter uses standard formulas used in unit conversion in science, engineering, cooking, and everyday use. Enter your inputs, and the tool calculates the result instantly in your browser. No server-side processing means your data stays on your device. Results update in real time as you change inputs.
Binary vs decimal storage measurements
Computers work in binary (base-2), so storage is naturally measured in powers of 2: 1 KB = 1,024 bytes, 1 MB = 1,048,576 bytes. The SI system uses powers of 10: 1 KB = 1,000 bytes. This discrepancy causes confusion — a 500 GB hard drive (500 × 10⁹ bytes) appears as about 465 GB on a Mac or Windows PC, which reports in binary.
Key data storage conversions
1 byte = 8 bits | 1 KB = 1,024 bytes | 1 MB = 1,024 KB = 1,048,576 bytes | 1 GB = 1,024 MB | 1 TB = 1,024 GB | 1 PB = 1,024 TB.
Real-world file size reference
A typical photo (JPEG): 2–5 MB. A three-minute MP3: ~3–5 MB. A 4K movie: 50–100 GB. An hour of HD video: ~1–2 GB. A text document: 10–100 KB. Smartphone apps: 50 MB–2 GB. Knowing these helps you estimate storage needs.
Data storage: how it works
Unit conversion matters across engineering, science, cooking, and everyday life. This tool applies internationally recognised conversion factors to deliver precise, instant results across all major unit systems — no manual lookup needed.
Who uses this tool?
Scientists, engineers, chefs, and international travellers use this tool daily to bridge the gap between different measurement systems. It eliminates the need to memorise conversion factors or hunt through reference tables.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →