My file is 500 MB. Is that more or less than 1 GB?

500 MB < 1 GB. Since 1 GB = 1024 MB, a 500 MB file is about half a gigabyte (0.488 GB).

Why is 1 GB = 1024 MB and not 1000 MB?

Computers use binary (base 2). 1024 = 2^10. This is the 'proper' binary definition. Decimal (1000) is sometimes used for marketing (looks bigger), but operating systems use 1024.

My hard drive says 1 TB, but my OS shows less available. Why?

Manufacturer marketing. Hard drives use decimal (1 TB = 1,000 GB), but the OS uses binary (1 TiB = 1024 GiB). Plus, OS files take space. 1 TB ≈ 931 GiB usable.

What's the difference between GB and GiB?

GB = decimal (1000 MB), GiB = binary (1024 MiB). Your computer reports GiB, but manufacturers advertise GB. It's confusing but standardized in IEC 60027-2.

Megabytes (MB) to Gigabytes (GB) Converter

Enter a value to instantly convert between data storage units.

From

Precision4 dp

1 Megabyte = 0.001 Gigabyte

Key Formulas

Megabyte → Gigabyte

GB = MB × 0.000976563

Gigabyte → Megabyte

MB = GB × 1024

Gigabyte → Terabyte

TB = GB × 0.000976563

Terabyte → Gigabyte

GB = TB × 1024

Formula

GB = MB ÷ 1024

Megabytes (MB) and gigabytes (GB) are common units for digital storage and file sizes. 1 GB = 1024 MB (binary), though sometimes people use 1000 MB. This is important when downloading files, checking cloud storage, or comparing device capacities. Understanding the difference matters for accurate storage planning.

Source: IEC 60027-2:2000 (Letter symbols for units)

Frequently Asked Questions

Real-World Examples

One gigabyte. By definition, 1 GB = 1024 MB in binary (what your device reports). Decimal: 1000 MB ≈ 1 GB.

1024 MB = 1 GB

A large video file. An hour of video might be 500-700 MB, or about 0.5-0.7 GB.

500 MB = 0.488 GB

Two gigabytes. A typical app download or document folder might be 1-2 GB.

2048 MB = 2 GB

Small files. A collection of photos (50-100 MB) takes up roughly 0.1 GB.

100 MB = 0.098 GB

gb to mb gb to tb tb to gb kb to mb mb to kb

Megabytes (MB) to Gigabytes (GB) Converter

Key Formulas

Formula

Frequently Asked Questions

Real-World Examples

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