Byte Converter

Convert MB to GB, KB to MB, bytes to gigabytes and 37 more unit pairs instantly. Supports both SI decimal units (KB = 1,000 bytes) and IEC binary units (KiB = 1,024 bytes). Ideal for developers, sysadmins, and anyone working with file sizes, RAM, or network bandwidth.

How to use

This converter handles precise conversions using exact decimal and binary multiplication factors. All conversions normalize through a base byte value before being expressed in the target unit.

1Enter ValueType the numeric value you want to convert in the 'Value' field.

2Select UnitsChoose the original unit (From) and the unit you want to convert to (To) from the dropdowns.

3Copy ConversionThe converted value will be displayed immediately in the result field.

Common Applications

Storage unit conversion is essential in many technical and everyday scenarios:

Plan storage infrastructure — convert GB to TB for NAS, backup systems and cloud deployments
Calculate network bandwidth consumption — convert Mbps to GB/day to estimate data transfer costs
Understand hardware specs — compare GiB vs GB to resolve confusion between OS-reported and manufacturer-advertised sizes
Debug embedded systems and IoT devices where byte-level precision matters between KB and KiB
Compare cloud storage pricing across providers that use different unit standards (SI vs IEC binary)

SI vs IEC Binary: Technical Standards

Understanding the two competing standards is critical to avoid errors in storage calculations:

SI / Decimal units (KB, MB, GB, TB): 1 KB = 1,000 bytes — defined by IEC 80000-13, used by hard drive manufacturers and network providers
IEC / Binary units (KiB, MiB, GiB, TiB): 1 KiB = 1,024 bytes — defined by IEC 60027-2, used by operating systems for RAM and file system reporting
The gap grows with scale: 1 TB (SI) ≈ 0.909 TiB (binary) — a 1 TB drive shows ~931 GiB in Windows or macOS
40 units supported: from Bit and Byte through Kilobyte, Megabyte, Gigabyte, Terabyte, Petabyte and all IEC binary equivalents

All Supported Units

BByte

bBit

KBKilobyte

KbKilobit

KiBKibibyte

KibKibibit

MBMegabyte

MbMegabit

MiBMebibyte

MibMebibit

GBGigabyte

GbGigabit

GiBGibibyte

GibGibibit

TBTerabyte

TbTerabit

TiBTebibyte

TibTebibit

PBPetabyte

PbPetabit

PiBPebibyte

PibPebibit

cBCentibyte

cbCentibit

daBDecabyte

dabDecabit

dBDecibyte

dbDecibit

fBFemtobyte

fbFemtobit

hBHectobyte

hbHectobit

mBMillibyte

mbMillibit

nBNanobyte

nbNanobit

pBPicobyte

pbPicobit

μBMicrobyte

μbMicrobit

Questions & Answers

What is the difference between MB and MiB?

MB (Megabyte) is an SI unit: 1 MB = 1,000,000 bytes. MiB (Mebibyte) is an IEC binary unit: 1 MiB = 1,048,576 bytes. The difference (~4.9%) is small at low scales but becomes significant at GB and TB ranges.

Why does my 1 TB hard drive show less space on my computer?

Hard drive manufacturers use SI units: 1 TB = 1,000,000,000,000 bytes. Operating systems (Windows, macOS, Linux) display storage in binary units: 1 TiB = 1,099,511,627,776 bytes. So 1 TB ≈ 931 GiB — the drive is not missing storage, it's a unit standard difference.

How do I convert Mbps to MB/s?

Divide by 8: 1 Megabit = 0.125 Megabytes (since 1 byte = 8 bits). So a 100 Mbps connection can transfer about 12.5 MB per second at peak speed.

Which standard should I use: KB or KiB?

For file sizes and disk storage: KB (SI, 1,000 bytes). For RAM specifications and programming byte buffers: KiB (IEC binary, 1,024 bytes) is technically correct. Modern standards (IEC 60027-2) reserve 'K' for 1,000 and 'Ki' for 1,024 to eliminate ambiguity.

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