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MB to KB Converter

Convert megabytes to kilobytes instantly, with a reference table for upload limits and image budgets.

MB to KB Converter

1 MB = 1,000 KB

Multiply megabytes by 1,000 to get kilobytes.

The link carries the values you entered, so whoever opens it sees the same result. Nothing is stored on our side — the numbers travel in the link itself.

Megabytes to kilobytes reference table

The conversions people look up most often, rounded to 2 decimal places.

Common megabytes to kilobytes conversions
Megabyte (MB)Kilobyte (KB)
0.1 MB100 KB
0.25 MB250 KB
0.5 MB500 KB
1 MB1,000 KB
2 MB2,000 KB
5 MB5,000 KB
10 MB10,000 KB
20 MB20,000 KB
25 MB25,000 KB
50 MB50,000 KB
100 MB100,000 KB
500 MB500,000 KB
1,000 MB1,000,000 KB

How the mb to kb converter calculation works

Using the decimal definition, 1 MB = 1,000 KB:

kilobytes = megabytes × 1000

Multiply by 1,024 instead if you need the binary figure — 1 MiB is 1,024 KiB.

This conversion usually gets done in one direction for one reason: a form has a size limit in KB and your file is in MB.

  • 0.5 MB → 500 KB
  • 1 MB → 1,000 KB
  • 2 MB → 2,000 KB
  • 5 MB → 5,000 KB

Common limits, converted:

Limit In KB
Passport photo upload, often 240 KB 0.24 MB
Government forms, often 2 MB 2,000 KB
Gmail attachment, 25 MB 25,000 KB
Most job application portals, 5 MB 5,000 KB

How to actually get under a limit. For a photo, resolution is the lever, not the quality slider: halving both dimensions cuts the pixel count to a quarter and the file size by roughly as much. Dropping JPEG quality from 100 to 80 typically halves the size again with no visible loss — quality 100 spends most of its bytes on detail no eye will see.

For a PDF, the size is almost always embedded images rather than text. Exporting at 150 dpi instead of 300 dpi usually gets a document under a 2 MB limit, and stays sharp on screen. 300 dpi only matters if it will be printed.

Screenshots are deceptively large. A full-screen PNG can be 3–5 MB; saving the same image as JPEG usually lands under 500 KB.

Frequently asked questions

How do I convert megabytes to kilobytes?

Multiply the number of megabytes by 1000 to get kilobytes.

How many kilobytes are in 2 MB?

2 MB equals 2000.00 KB. The reference table on this page lists the other values people look up most often.

How do I convert kilobytes back to megabytes?

Divide the number of kilobytes by 1000, or use the swap control on the converter above.

Is this conversion exact?

Yes. The factor is fixed by international definition rather than measured, so the conversion is exact - only the displayed rounding limits precision.

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