GB to MB
Convert GB to MB. Enter a value and view the calculation method, examples and conversion table.
Data size converter
GB to MB formula
The calculator converts the input to the category's reference unit, then divides by the target unit's factor.
Result = input × source factor ÷ target factor
1 × (1,000,000,000 ÷ 1,000,000) = 1,000
Worked example: 1 Gigabytes = 1,000 Megabytes
Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
GB to MB conversion table
| Gigabytes | Megabytes |
|---|---|
| 1 Gigabytes | 1,000 Megabytes |
| 2 Gigabytes | 2,000 Megabytes |
| 5 Gigabytes | 5,000 Megabytes |
| 10 Gigabytes | 10,000 Megabytes |
| 20 Gigabytes | 20,000 Megabytes |
| 50 Gigabytes | 50,000 Megabytes |
| 100 Gigabytes | 100,000 Megabytes |
| 250 Gigabytes | 250,000 Megabytes |
| 500 Gigabytes | 500,000 Megabytes |
| 1,000 Gigabytes | 1,000,000 Megabytes |
Definitions and assumptions
One byte is eight bits. Decimal prefixes use powers of 1000; binary prefixes such as KiB and MiB use powers of 1024. In this tool, one word is explicitly defined as 16 bits.
How to use this calculator
- Enter the value you want to convert.
- Choose the source and target units, then adjust the display precision if needed.
- Read the result. Select Convert to open a page for this value, or use the table below.
Frequently asked questions
how many MB is 1 GB?
1 Gigabytes = 1,000 Megabytes. Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
how to convert GB to MB?
The calculator converts the input to the category's reference unit, then divides by the target unit's factor. 1 × 1,000 ≈ 1,000 Megabytes. Use the source and target factors shown in the formula. The worked example uses the value on this page, and the table provides other common values.
Why does 1 MB differ from 1 MiB?
One MB is 1,000,000 bytes. One MiB is 1,048,576 bytes. Storage products and software may use different conventions, so check both the symbol and definition.
Why is the displayed result rounded?
Auto mode preserves significant digits for small values; manual mode rounds to the selected decimal places. ≈ means approximate; < means below the display limit. Extreme values use × 10ⁿ. Calculations are rounded only for display.
What input range can I use?
This calculator accepts non-negative values up to 1 trillion, with up to 8 decimal places. It does not calculate signed vectors or calendar date intervals.
Why is a unit unavailable?
A conversion is unavailable when a verified unit definition or a current exchange-rate value has not been configured. The tool does not invent a coefficient.
Sources and methodology
Methods and sources · Content revised
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