Data Converter
Convert between bytes, KB, MB, GB, TB, PB and bits. Instant digital storage conversion.
Common conversions
1 Gigabyte =
1,000
Megabyte
1 Gigabyte in all units
How to Use
- 1
Enter a value
Type the data size you want to convert.
- 2
Select input unit
Choose from bits, bytes, KB, MB, GB, TB, and more.
- 3
See all results
All equivalent data sizes update instantly.
How It Works
This tool converts between digital storage units — bytes, KB, MB, GB, TB, PB, and bits — using the decimal (SI) standard where 1 KB = 1000 bytes, matching how storage manufacturers and most modern software report sizes.
Decimal vs. binary — why your OS sometimes shows a different number
This tool uses the decimal standard (1 GB = 1000 MB), matching SSD/HDD manufacturer labeling and most cloud storage pricing. Some operating systems instead use the binary convention internally (1 "GB" = 1024 MB, more precisely called a GiB) — which is why a drive sold as "500 GB" sometimes shows as roughly 465 GB in your file explorer. Both are valid depending on which standard is being used; this tool is consistent with the decimal (marketing/SI) standard.
Bits vs. bytes
1 byte = 8 bits. This distinction matters most for internet speed: ISPs advertise download speed in megabits per second (Mbps), but file sizes and download progress are usually shown in megabytes (MB) — so a "100 Mbps" connection downloads at a theoretical maximum of 12.5 MB/s, not 100 MB/s.
Examples
Storage conversion
A 256 GB SSD: 256 × 1000 = 256,000 MB, or 256,000,000,000 bytes in the decimal standard used here.
Download speed math
On a 100 Mbps connection: 100 ÷ 8 = 12.5 MB/s theoretical max download speed — real-world speeds are usually somewhat lower due to overhead.
Common Use Cases
- Understanding why your OS reports a different capacity than a drive's advertised size
- Converting ISP-advertised internet speed (Mbps) into expected download speed (MB/s)
- Estimating cloud storage or data transfer costs across GB/TB
- General file-size and storage planning conversions
Tips
- When budgeting cloud storage or transfer costs, check whether the provider bills in decimal (1000-based) or binary (1024-based) units — the difference compounds to a meaningful gap at TB scale (about 10% at 1 TB, using strictly decimal vs binary GB).
- Remember the bits-vs-bytes factor of 8 whenever converting internet speed to file transfer time — it's the single most common data-unit mistake.
Frequently Asked Questions
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