# | Input | From | To | Result | Timestamp |
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Sample conversions using both decimal and binary standards for quick reference.
# | Input (kB) | MB (decimal) | MiB (binary) |
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Decimal (SI) pathway:
- 1 kB = 1000 bytes
- 1 MB = 1,000,000 bytes = 1000 kB
- MB = (kB × 1000) ÷ 1,000,000 = kB ÷ 1000
Binary (IEC) pathway:
- 1 KiB = 1024 bytes
- 1 MiB = 1,048,576 bytes = 1024 KiB
- To map from kB (SI) to MiB (IEC): MiB = (kB × 1000) ÷ 1,048,576
- If your input is actually in KiB, then MiB = KiB ÷ 1024
Select the exact input and output units in the form to avoid ambiguity.
- Enter the Input value in the box.
- Choose the correct Input unit: kB if your tool uses 1000, or KiB if it uses 1024.
- Pick the desired Output unit: MB (decimal) or MiB (binary).
- Click Convert to see results instantly; adjust decimals if needed.
- Every conversion is stored in History for export as CSV or PDF.
- Use the Example Data table for quick checks.
Tip: When sharing numbers with teammates or clients, state the unit system (decimal or binary) to avoid confusion.
1) What is the difference between MB and MiB?
MB is decimal based (1000 multiplier). MiB is binary based (1024 multiplier). They represent different unit systems and therefore give slightly different values.
2) Should I select kB or KiB for the input?
Choose kB if your source uses 1000 bytes per kilobyte. Choose KiB if your source uses 1024 bytes per kibibyte. Many operating systems and programming tools use binary units.
3) Why do I see two different results across apps?
Apps may mix decimal and binary units. If one app reports in MB and another in MiB, the values will differ by about 4.86% for the same underlying bytes.
4) How precise are the results?
You can set decimals up to 12 places. Internally the calculator performs exact arithmetic on bytes then rounds to your chosen precision for display.
5) Can I export my conversions?
Yes. Use the buttons to export the history or example table as CSV or PDF. The PDF uses automatic table layout for clean printing.
6) Does the calculator store data on a server?
No. All calculations and history live in your browser memory. Use the Reset button to clear the session.
7) How do I convert MB back to kB?
Reverse the pathway: convert MB/MiB to bytes, then divide by 1000 for kB or by 1024 for KiB. A dedicated reverse mode can be added if you need it.