Data Size Unit Converter
Convert between Bytes (B), Kilobytes (KB), Megabytes (MB), Gigabytes (GB), Terabytes (TB), and Petabytes (PB). Supports both Binary (1024) and SI (1000) standards.
About Data Size Unit Conversion
Digital data measurement uses two distinct standards: Binary (Base-2 / IEC 60027-2) and SI Decimal (Base-10). Operating systems like Windows measure file sizes and memory in powers of 2 (1 KiB = 1,024 Bytes), while drive manufacturers, networking equipment, and cloud providers measure storage in powers of 10 (1 KB = 1,000 Bytes).
Our Data Size Unit Converter enables toggling between Binary and SI standards to calculate exact values across Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, and Petabytes in real time.
Real-World Use Cases
💾 Hard Drive Capacity Discrepancy
Understand why a 1 TB external SSD shows up as ~931 GB in Windows (1 TB decimal = 0.931 GiB binary).
☁️ Cloud Storage Bandwidth Costing
Calculate AWS S3, Google Cloud, or Azure egress traffic data sizes in GB/TB for infrastructure cost forecasting.
🚀 Network & API Transfer Sizing
Convert raw byte size header metrics from HTTP responses into human-readable MB or GB values for UI dashboards.
Frequently Asked Questions
What is the difference between Binary (1024) and SI (1000) standards?
Binary uses powers of 2 (1024 = 2¹⁰), common in operating systems (RAM, file sizes). SI uses powers of 10 (1000 = 10³), used by storage manufacturers. This is why a 1 TB hard drive shows as ~931 GB in Windows.
How many MB are in a GB?
In Binary mode, 1 GB (GiB) = 1,024 MB. In SI mode, 1 GB = 1,000 MB.
What is a Petabyte (PB)?
A Petabyte is 1,024 Terabytes (or 1,000 TB in decimal mode), equal to 1,000,000 Gigabytes of data storage.