How Data Storage Converter Works
This tool converts through the byte, the base unit, using the binary convention that computers actually use internally — each step up is a multiple of 1024, not 1000. So 1 kilobyte = 1,024 bytes, 1 megabyte = 1,048,576 bytes (1,024²), and 1 gigabyte = 1,073,741,824 bytes (1,024³). Some operating systems and marketing materials use 1000-based (decimal) units instead and label them the same way, which is why a "1 TB" drive can show up as roughly 931 GB in your file explorer.
How to Use This Tool
- Enter the size you want to convert into the value field.
- Choose the unit it's currently in, from bits up to terabytes.
- The results box shows that size converted into every other unit at once, updating as you type.
- Select Reset to clear the field and start over.
Example
Converting 2.5 gigabytes: 2.5 × 1,073,741,824 = 2,684,354,560 bytes, which is exactly 2,560 megabytes (2.5 × 1,024) and 21,474,836,480 bits (2,684,354,560 × 8).
Helpful Tips
- If a file size looks smaller than expected on a storage device, it's usually because the manufacturer used decimal (1000-based) gigabytes while your operating system reports binary (1024-based) ones.
- A byte is 8 bits, which is why converting between bits and bytes always produces a clean multiple of 8.
Frequently Asked Questions
Why does this converter use 1024 instead of 1000?
1024-based (binary) units are the standard computing convention, matching how memory and storage are actually addressed internally (1024 = 2^10). Some contexts use 1000-based decimal units instead — technically those should be labeled KiB, MiB and GiB, but in practice "KB", "MB" and "GB" are used for both, which causes confusion.
Why does my hard drive show less space than advertised?
Drive manufacturers typically use decimal (1000-based) units for marketing, while your operating system reports capacity using binary (1024-based) units. A drive labeled 1 TB (1,000,000,000,000 bytes) shows as roughly 931 GB when measured in binary gigabytes.
What's the difference between a bit and a byte?
A bit is the smallest unit of data, a single 0 or 1. A byte is a group of 8 bits and is the standard unit for measuring file and storage sizes — that's why the bit-to-byte factor used here is 0.125 (1/8).
Why do bytes-to-terabytes conversions show so many decimal places?
A terabyte is nearly 1.1 trillion bytes, so converting a small byte value into terabytes produces a very small fraction — extra decimal precision keeps that number from rounding away to zero.
This tool runs entirely in your browser. Your input is not uploaded to any server.