Byte Converter

Convert between bytes, KB, MB, GB, TB, and PB instantly — free and accurate, right in your browser.

Overview

What is a byte converter?

A byte converter translates a digital storage size from one unit to another — bytes, kilobytes, megabytes, gigabytes, terabytes, or petabytes — using the precise multiplier between each unit, so the converted figure always represents exactly the same amount of data.

This matters for anyone working with file sizes, storage capacity, bandwidth, or memory — developers estimating payload sizes, IT teams planning storage, or anyone trying to understand why a drive's advertised capacity doesn't match what their computer reports.

Guide

How to use it

Three steps, no learning curve — enter a value, pick units, read the result.

Step 01

Enter a value

Type the number you want to convert into the amount field.

Step 02

Pick units

Choose the unit you're converting from and the unit you want to convert to, or tap swap to flip them.

Step 03

See the result instantly

The converted value updates live the moment you change any input.

Tips

Best practices to keep in mind

A few things worth knowing about how storage units actually work.

This calculator uses binary units (1 KB = 1024 bytes), the convention used by operating systems for file sizes — some manufacturers use decimal units (1 KB = 1000 bytes) for storage capacity marketing instead.
That binary-versus-decimal difference is exactly why a drive advertised as 1TB shows up as roughly 931GB in your operating system — both numbers are correct, just measured differently.
When estimating storage needs for backups or transfers, round up rather than down — file system overhead, metadata, and block allocation always use slightly more space than the raw data size alone.
Don't confuse bytes with bits when checking internet speed — ISPs advertise connection speed in megabits per second (Mbps), while file sizes and downloads are measured in megabytes (MB), which is 8 times larger.

Comparison

SEOJuicer vs. other byte converters

The same result, minus the uploads, the signup wall, and the paywall.

SEOJuicer

Runs entirely in your browser

Free, no signup required

Covers Bytes to PB

One-tap swap between units

Unlimited conversions

Other tools

Often loaded with ads

May require an account

Limited unit range

Manual re-entry to swap

Slower, server-based results

FAQs

Frequently asked questions

Have questions about converting storage units? Here are the most common ones our users ask before getting started.

Is this byte converter free to use?

Yes, the byte converter is completely free with no signup, no usage limits, and no hidden charges. It runs entirely in your browser using JavaScript, so no data ever leaves your device and no account is required to convert between storage units.

What units does this byte converter support?

This tool converts between bytes, kilobytes (KB), megabytes (MB), gigabytes (GB), terabytes (TB), and petabytes (PB), using the binary convention where each unit is 1024 times the one below it — the same standard your operating system uses when reporting file and drive sizes.

Why does my hard drive show less space than advertised?

Storage manufacturers typically use decimal units where 1TB equals exactly 1,000,000,000,000 bytes, while operating systems report storage using binary units where 1TB is 1,099,511,627,776 bytes. The same physical drive is genuinely smaller when measured in binary, which is why a 1TB drive shows as roughly 931GB in Windows or macOS.

How accurate is this conversion?

The conversion is mathematically exact — every unit conversion is calculated using the precise 1024-based binary multiplier between adjacent units, so results are accurate to the full precision of a standard floating-point calculation, not rounded estimates.

Can I convert file sizes for backups, downloads, or storage planning?

Yes — this converter is commonly used to translate a file or folder size reported in one unit into another, such as converting a reported megabyte count into gigabytes when estimating cloud storage costs, backup capacity, or how many files will fit on a given drive.

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