How to convert gigabytes to megabytes

Step-by-step explanation of how to convert gigabytes to megabytes, with formulas, worked examples, and a free online calculator.

To convert gigabytes to megabytes, multiply by 1024. The formula is: MB = GB × 1024. For example, 1 GB = 1024 MB, 4 GB = 4096 MB, 16 GB = 16384 MB. This conversion is common when comparing RAM, storage capacity, and data plan sizes. Some contexts use the SI definition (1 GB = 1000 MB) — disk drive manufacturers typically use SI, while operating systems and RAM specs use binary. The difference is small (1 GB binary = 1.074 GB SI) but adds up at scale.