Free online data storage converter. Convert between bytes, KB, MB, GB, TB, and PB in both binary (1024) and decimal (1000) systems.
Our free Data Storage Converter makes it easy to convert between all digital storage units — from bytes up to petabytes — in both binary (base-1024) and decimal (base-1000) systems. Whether you're planning storage upgrades, calculating download times, or comparing drive capacities, this tool provides accurate results instantly.
Data storage units can be confusing because there are two standards: binary (used by operating systems, where 1 KB = 1,024 bytes) and decimal (used by drive manufacturers, where 1 KB = 1,000 bytes). This is why a 1 TB hard drive shows approximately 931 GB in your operating system. Our converter supports both standards.
Enter a value, choose your units, select binary or decimal mode, and get an instant conversion. Perfect for IT professionals, developers, and anyone working with digital storage.
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Binary: 1 KB = 1,024 B, 1 MB = 1,024 KB, 1 GB = 1,024 MB, 1 TB = 1,024 GB, 1 PB = 1,024 TB. Decimal: 1 KB = 1,000 B, 1 MB = 1,000 KB, 1 GB = 1,000 MB, 1 TB = 1,000 GB, 1 PB = 1,000 TB.
Result: 5,120 MB
In binary mode, 5 GB × 1,024 MB/GB = 5,120 MB. In decimal mode, the result would be 5,000 MB. The binary system is what your operating system reports.
Digital storage is measured in units based on the byte. As data sizes have grown, we use prefixed units like kilobytes, megabytes, gigabytes, terabytes, and petabytes. The confusion between binary and decimal systems means the same label can represent different amounts.
When you buy a 500 GB hard drive, the manufacturer means 500 billion bytes (decimal). Your computer reports this as about 465 GB because it divides by 1,024 instead of 1,000 at each level. This discrepancy has led to lawsuits and the IEC's creation of binary prefixes (KiB, MiB, GiB).
Data storage conversions are essential for capacity planning, comparing storage options, calculating backup requirements, estimating download times, and understanding cloud storage pricing. This converter handles both standards to give you the most useful result.
Drive manufacturers measure capacity in decimal (1 TB = 1,000,000,000,000 bytes), but your operating system displays it in binary (1 GB = 1,073,741,824 bytes). So 1,000,000,000,000 ÷ 1,073,741,824 ≈ 931 GB.
Binary uses powers of 1,024 (2¹⁰) while decimal uses powers of 1,000. Binary is used by operating systems and RAM, while decimal is used by storage manufacturers and network speeds.
In binary: 1 GB = 1,024 MB. In decimal: 1 GB = 1,000 MB. Most people and operating systems use the binary definition.
A petabyte (PB) is 1,024 terabytes in binary or 1,000 terabytes in decimal. It equals about 1 million gigabytes. Large data centers and cloud providers work with petabytes of storage.
It depends on the context. Historically and in computing, a kilobyte is 1,024 bytes (binary). The IEC standard defines 1 kibibyte (KiB) as 1,024 bytes and 1 kilobyte (KB) as 1,000 bytes, but common usage still treats KB as 1,024 bytes.
Divide the file size in bits by the transfer speed in bits per second. Remember that 1 byte = 8 bits. For example, a 1 GB file at 100 Mbps takes about 80 seconds: (1,073,741,824 × 8) ÷ 100,000,000 ≈ 85.9 seconds.