GB to MB Converter
Convert gigabytes (GB) to megabytes (MB). Choose decimal or binary interpretation to match how storage is labeled or displayed.
Enter GB, then choose decimal vs binary to match your context.
| Unit | Value |
|---|
Privacy: runs locally in your browser. No inputs are stored or transmitted.
How it works
Decimal: MB = GB × 1000
Binary: MiB = GiB × 1024
If your GB value is a decimal-labeled size but you want an OS-style binary display,
convert GB → bytes (×1,000,000,000) then bytes → MiB (÷1,048,576).
Examples
- 1.5 GB → 1500 MB (decimal)
- 1.5 GB → 1536 MiB (binary GiB→MiB)
- 0.25 GB → 250 MB (decimal)
FAQ
- Is 1 GB equal to 1000 MB or 1024 MB?
Both are used. Decimal units use 1 GB = 1000 MB. Binary units use 1 GiB = 1024 MiB. This tool can show both, depending on your selection.
- Which option matches what my computer shows?
Many operating systems display storage using binary units (GiB/MiB) even when labeling them as GB/MB. If you are matching an OS display, try the binary-equivalent option.
- Can I enter decimals (e.g., 1.25 GB)?
Yes. Decimals are supported.
- Are my inputs stored?
No. This converter runs locally in your browser.