Megabytes to Kilobytes
One megabyte equals 1000 kilobytes.
Kilobytes = megabytes × 1000
Digital Storage Conversion
Common File Sizes
Digital Storage Reference Guide
Binary vs Decimal Systems
Binary (1024-based): Used by operating systems
1 KiB = 1,024 bytes
1 MiB = 1,024 KiB = 1,048,576 bytes
1 GiB = 1,024 MiB = 1,073,741,824 bytes
Decimal (1000-based): Used by storage manufacturers
1 KB = 1,000 bytes
1 MB = 1,000 KB = 1,000,000 bytes
1 GB = 1,000 MB = 1,000,000,000 bytes
Storage Device Capacities
Floppy Disk: 1.44 MB
CD: 700 MB
DVD: 4.7 GB (single layer)
Blu-ray: 25 GB (single layer)
USB Flash: 8 GB - 1 TB
SSD: 120 GB - 8 TB
HDD: 500 GB - 20 TB
Enterprise: Up to 100 TB+
Data Transfer & Internet
Email attachment limit: ~25 MB
Streaming (HD): ~3 GB/hour
Streaming (4K): ~7 GB/hour
Web page: ~2 MB average
Mobile app: 10-200 MB
PC game: 20-150 GB
Important Notes
• 1 byte = 8 bits (fundamental relationship)
• Storage manufacturers use decimal, OS shows binary (explains "missing" space)
• Network speeds typically measured in bits per second (bps)
• File compression can significantly reduce storage requirements
Megabytes to Kilobytes Conversion Table
| MB | KB |
|---|---|
| 0.05 | 50 |
| 0.1 | 100 |
| 0.25 | 250 |
| 0.5 | 500 |
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 250 | 250000 |
| 500 | 500000 |
| 1000 | 1000000 |
About This Conversion
Megabytes to kilobytes multiplies by 1,000 in decimal units. It is the conversion needed when a limit is stated in megabytes but a tool reports or requires kilobytes: upload caps, image size restrictions, form field limits.
Application settings often ask for kilobytes specifically. A 2 MB upload cap is 2,000 KB, and a 25 MB attachment limit is 25,000 KB. Configuration that expects kilobytes and receives megabytes silently applies a limit a thousand times too small.
Frequently Asked Questions
How many KB is 1 MB?
1 MB is 1,000 KB in decimal units.
How many KB is 2 MB?
2 MB is 2,000 KB.
How many KB is 0.5 MB?
0.5 MB is 500 KB.
How many KB is 25 MB?
25 MB is 25,000 KB.
Worth Knowing
MB vs MiB
A megabyte is 1,000,000 bytes while a mebibyte is 1,048,576 bytes, and the gap grows with each prefix until a 1 TB drive reports as 931 GB.
Related Conversions
Converting the other way? Kilobytes to Megabytes
Need a different unit? Open the full digital storage converter