How many kilobytes are in a megabyte?

1 MB = 1000 KB. To convert any amount, multiply by 1000.

How do you convert megabytes to kilobytes?

Multiply the number of megabytes by 1000 to get kilobytes. The formula is shown in the "How it's calculated" section above.

Where does the conversion factor come from?

It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.

Unit converter — Data storage

Megabytes to kilobytes converter

Convert megabytes (MB) to kilobytes (KB). Source-cited conversion factor, exact to the displayed precision.

Results are mathematically exact for the displayed precision. How we calculate.

How it's calculated

Convert megabytes to kilobytes— the formula

Megabytes convert to kilobytes by multiplying by the published conversion factor. The factor below is exact to the precision shown, sourced from the citation under the formula.

KB = MB × 1000

MB = KB × 0.001

IEC 80000-13 + NIST: KB/MB/GB use decimal prefixes (10³, 10⁶, 10⁹). 1 byte = 8 bits.

Questions

Frequently asked questions

How many kilobytes are in a megabyte?
1 MB = 1000 KB. To convert any amount, multiply by 1000.
How do you convert megabytes to kilobytes?
Multiply the number of megabytes by 1000 to get kilobytes. The formula is shown in the "How it's calculated" section above.
Where does the conversion factor come from?
It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.