KB/MB/GB/TB Converter

Decimal vs. Binary - Which Applies?

1 MB can mean either 1,000,000 bytes (decimal, SI convention - used by storage manufacturers and most modern OS file managers) or 1,048,576 bytes (binary, technically 1 MiB) - this tool lets you choose explicitly rather than guessing, since the two conventions genuinely differ by about 5% at the MB scale and more at larger scales.

How to Use It

1. Enter a value and its current unit (KB, MB, GB, or TB).
2. Choose decimal or binary convention.
3. Select the target unit - the exact multiplier used is shown alongside the result.

Limitations

This is pure unit conversion arithmetic - it doesn't inspect any actual file or report real-world storage capacity, only the numbers you provide.

Quick Reference

How Big the Difference Gets

The gap between the two conventions grows with each step: about 2.4% at KB, 4.9% at MB, 7.4% at GB and 10% at TB. That is why a "4 TB" drive shows about 3.64 TB in Windows.

Everyday Examples

• A 12 MP phone photo is typically 2-5 MB, so 1 GB holds roughly 200-500 photos.
• An hour of 1080p video is often around 2-4 GB, depending on the bitrate.
• A 50 GB mobile data plan equals 50,000 MB in decimal units.

For bits, petabytes and more units, use the Byte Converter. To plan space for many files, try the Storage Calculator.