Data Storage Converter
Convert bytes, KB, MB, GB, TB
13 units
Binary and decimal
Reference table
Your phone says 128 GB storage. The cloud plan offers 2 TB. The file is 500 MB. The internet speed is 100 Mbps. How long to download? And why does your "500 GB" drive only show 465 GB available?
Data storage units are confusing by design—mixing decimal and binary systems, bits and bytes, marketing and technical definitions. This converter clarifies all of them.
What is Data Storage Conversion?
Data storage conversion transforms digital capacity measurements between units. Complexity arises from two competing systems: decimal (powers of 1000) used by storage manufacturers, and binary (powers of 1024) used by operating systems.
Key conversions:
Decimal (SI):
1 KB = 1,000 bytes
1 MB = 1,000 KB = 1,000,000 bytes
1 GB = 1,000 MB = 1,000,000,000 bytes
1 TB = 1,000 GB
Binary (IEC):
1 KiB = 1,024 bytes
1 MiB = 1,024 KiB = 1,048,576 bytes
1 GiB = 1,024 MiB = 1,073,741,824 bytes
1 TiB = 1,024 GiB
Also: 1 byte = 8 bits
A "500 GB" drive has 500,000,000,000 bytes (decimal). Your OS reports 465 GiB (binary). Same bytes, different counting systems.
Why People Actually Need This Tool
Storage manufacturers use decimal (bigger-sounding numbers). Operating systems use binary (actual computing). The ~7% difference compounds at larger sizes.
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Storage planning — Understand actual usable capacity vs advertised.
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Download time — Calculate how long file transfers will take.
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Cloud storage — Compare plans using different unit conventions.
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File management — Estimate how many files fit on storage.
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Network planning — Convert between bits (speed) and bytes (files).
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Photography — Calculate photo storage requirements.
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Video production — Estimate storage needs for footage.
How to Use the Data Storage Converter
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Enter value — The data amount you want to convert.
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Select from unit — Your current unit (specify decimal or binary).
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Select to unit — Your target unit.
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View conversion — Instant result with exact byte count.
| Unit | Decimal (SI) | Binary (IEC) | Common Use |
|---|---|---|---|
| KB/KiB | 1,000 bytes | 1,024 bytes | Small files, documents |
| MB/MiB | 1,000,000 bytes | 1,048,576 bytes | Music, photos |
| GB/GiB | 10⁹ bytes | 2³⁰ bytes | Apps, games, videos |
| TB/TiB | 10¹² bytes | 2⁴⁰ bytes | Hard drives, backups |
| PB/PiB | 10¹⁵ bytes | 2⁵⁰ bytes | Data centers, archives |
Internet speeds use bits (Mbps). File sizes use bytes (MB). 100 Mbps = 12.5 MB/s maximum download speed.
Real-World Use Cases
1. The Missing Storage
Context: Bought 1 TB external drive. Computer shows only 931 GB.
Problem: Where did 69 GB go? Is the drive defective?
Solution: 1 TB (decimal) = 931 GiB (binary). Nothing missing—different counting.
Outcome: Understanding that the drive is correctly sized.
2. The Download Time
Context: 50 GB game download. Internet speed: 200 Mbps.
Problem: How long will this take?
Solution: 200 Mbps = 25 MB/s. 50 GB ÷ 25 MB/s = 2,000 seconds ≈ 33 minutes (theoretical max).
Outcome: Realistic download time expectation.
3. The Photo Storage
Context: Planning trip, each RAW photo is 25 MB. Have 64 GB card.
Problem: How many photos can I take?
Solution: 64 GB = ~64,000 MB. 64,000 ÷ 25 = 2,560 photos maximum.
Outcome: Adequate storage or need for additional cards.
4. The Cloud Plan Comparison
Context: Plan A: 2 TB for $10/month. Plan B: 2000 GB for $9/month.
Problem: Are these the same?
Solution: 2 TB = 2000 GB (in decimal, which cloud services use). Same storage.
Outcome: Choose cheaper plan—storage is identical.
5. The Video Production
Context: Shooting 4K video at 400 Mbps. 1-hour shoot planned.
Problem: How much storage needed?
Solution: 400 Mbps × 3600 seconds = 1,440,000 Mb = 180,000 MB = 180 GB per hour.
Outcome: Adequate storage prepared for shoot.
6. The Backup Calculation
Context: Backing up 500 GB over network. Speed: 1 Gbps.
Problem: How long for the backup?
Solution: 1 Gbps = 125 MB/s. 500 GB ÷ 125 MB/s = 4,000 seconds ≈ 67 minutes.
Outcome: Plan backup during appropriate window.
7. The RAM Specification
Context: Computer has 16 GiB RAM. Software requires 16 GB.
Problem: Is 16 GiB enough for 16 GB requirement?
Solution: 16 GiB = 17.18 GB. More than required.
Outcome: System meets software requirements.
Common Mistakes and How to Avoid Them
Storage companies use decimal because 1 TB sounds better than 931 GiB. Know the actual byte count.
Privacy and Data Handling
This Data Storage Converter operates entirely in your browser.
- No calculations are sent to any server.
- No data is stored.
- No account required.
- Works completely offline.
Your data stays private.
Conclusion
Data storage units are deliberately confusing—two different systems using similar-sounding names for different amounts. Understanding the decimal/binary distinction explains why your storage never seems as big as advertised.
This converter cuts through the confusion. Convert between any data units, understand actual capacities, and calculate transfer times accurately.
Your data deserves accurate measurement.