Megabytes to kilobytes
1 megabyte = 1024 kilobytes
For any other value: KB = MB × 1024
Calculator
1024 KB
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You can leave the unit in: 100 MB is fine.
Megabytes to kilobytes chart
The values people look up most.
| megabytes | 1 MB = 1024 KB | Decimal (1000) |
|---|---|---|
| 1 MB | 1024 KB | 1000 KB |
| 10 MB | 10240 KB | 10000 KB |
| 2 MB | 2048 KB | 2000 KB |
| 100 MB | 102400 KB | 100000 KB |
| 1000 MB | 1024000 KB | 1000000 KB |
| 25 MB | 25600 KB | 25000 KB |
| 4 MB | 4096 KB | 4000 KB |
| 5 MB | 5120 KB | 5000 KB |
| 50 MB | 51200 KB | 50000 KB |
| 20 MB | 20480 KB | 20000 KB |
| 15 MB | 15360 KB | 15000 KB |
| 6 MB | 6144 KB | 6000 KB |
| 500 MB | 512000 KB | 500000 KB |
| 3 MB | 3072 KB | 3000 KB |
| 1.5 MB | 1536 KB | 1500 KB |
| 150 MB | 153600 KB | 150000 KB |
| 30 MB | 30720 KB | 30000 KB |
| 12 MB | 12288 KB | 12000 KB |
| 200 MB | 204800 KB | 200000 KB |
| 250 MB | 256000 KB | 250000 KB |
| 8 MB | 8192 KB | 8000 KB |
| 512 MB | 524288 KB | 512000 KB |
| 0.1 MB | 102.4 KB | 100 KB |
| 2.5 MB | 2560 KB | 2500 KB |
| 40 MB | 40960 KB | 40000 KB |
| 35 MB | 35840 KB | 35000 KB |
| 7 MB | 7168 KB | 7000 KB |
| 300 MB | 307200 KB | 300000 KB |
| 16 MB | 16384 KB | 16000 KB |
| 32 MB | 32768 KB | 32000 KB |
Formula
KB = MB × 1024
1024 or 1000?
Both answers are right. This page uses 1 MB = 1024 KB, which is what Windows shows. Drive makers, and macOS since version 10.6, use 1 MB = 1000 KB, which is why a “500 GB” drive looks smaller in Windows than on the box. The chart shows both.
Where this number comes from
Likewise: NIST defines kibibyte and mebibyte to keep 1024 apart from 1000.
Source: Prefixes for binary multiples, NIST.
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