MB to GB Converter
Quick answer: To convert MB to GB, multiply by 0.001. For example, 10 MB is 0.01 GB. One megabyte equals 0.001 GB.
- Calculator
- Formula
- Examples
- Size compared
- About the units
- Where used
- Step by step
- Popular conversions
- Reading your result
- Mistakes
- FAQ
- Related tools
- Method
Use the MB to GB Converter
MB to GB formula and what each symbol means
GB = MB × 0.001
| Symbol | Meaning |
|---|---|
| MB | Megabyte |
| GB | Gigabyte |
MB to GB examples
1 MB
1 MB × 0.001 = 0.001 GB.
10 MB
10 MB × 0.001 = 0.01 GB.
100 MB
100 MB × 0.001 = 0.1 GB.
MB compared with GB
One GB is 1,000 times as large as one MB, so your number gets smaller when you convert MB to GB and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
About MB and GB
Megabyte (MB): 1,000,000 bytes. Gigabyte (GB): 10⁹ bytes.
Where MB to GB conversions are used
File sizes for email, uploads and downloads are quoted in kilobytes and megabytes. Memory (RAM) is usually specified in binary units.
How to calculate MB to GB step by step
- Enter the value in MB (the starting unit).
- Multiply by 0.001, because 1 MB = 0.001 GB.
- The product is the value in GB. To go back, divide by 0.001 or multiply by 1,000.
Popular data storage conversions
How to read your MB to GB result
A byte is 8 bits.
| MB | GB |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1,000 | 1 |
GB to MB: quick table
| GB | MB |
|---|---|
| 1 | 1,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
| 250 | 250,000 |
| 500 | 500,000 |
Common mistakes when calculating MB to GB
- Mixing bits and bytes: 8 bits make 1 byte.
- Dividing when you should multiply: from MB to GB multiply by 0.001; from GB to MB divide by 0.001.
MB to GB FAQ
How many GB are in 1 MB?
1 MB equals 0.001 GB.
How many MB are in 1 GB?
1 GB equals 1,000 MB.
Is 1 MB = 0.001 GB an exact conversion?
Yes. The megabyte and the gigabyte are both defined exactly in SI terms, so the ratio has no measurement uncertainty; 0.001 is just that ratio shown to 7 significant figures.
What is a gigabyte (GB)?
10⁹ bytes.
How can I estimate MB to GB in my head?
One GB is 1,000 times as large as one MB, so your number gets smaller when you convert MB to GB and bigger when you convert back. If the answer is not smaller than what you typed, you multiplied instead of dividing.
What is 40 MB in GB?
40 MB = 0.04 GB (since 40 × 0.001).
What is 200 MB in GB?
200 MB = 0.2 GB (since 200 × 0.001).
What is 3 MB in GB?
3 MB = 0.003 GB (since 3 × 0.001).
How many decimals should I keep when converting MB to GB?
Match the precision of your original measurement. For example, 0.01 GB rounds to 0.01 GB at 3 significant figures; keep more digits only for engineering or scientific work.
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST: prefixes for binary multiples, NIST SP 811, Appendix B.8: conversion factors