A data storage converter is a free online tool that instantly converts any digital storage value between all major units of data measurement — bits, bytes, kilobytes, megabytes, gigabytes, terabytes, petabytes, exabytes, and beyond — with complete accuracy and no manual calculation required.
A bit (binary digit) is the most fundamental unit of digital information. A bit has exactly two possible states — 0 or 1, off or on, false or true. Every piece of digital information is ultimately represented as a sequence of bits at the hardware level.
A byte is a group of 8 bits and is the standard unit of digital storage and data processing. Almost all modern storage, memory, and data transfer is measured in bytes or multiples of bytes.
A 100 Mbps internet connection transfers 100 megabits per second — which is only 12.5 megabytes per second. Downloading a 1 GB file on a 100 Mbps connection takes approximately 80 seconds, not 10 seconds.
There are two different, incompatible definitions of "kilobyte," "megabyte," "gigabyte," and "terabyte" — and both are in active use simultaneously:
| Prefix | Decimal Value | Binary Value | Difference |
|---|---|---|---|
| Kilo (K) | 1,000 | 1,024 | 2.4% |
| Mega (M) | 1,000,000 | 1,048,576 | 4.9% |
| Giga (G) | 1,000,000,000 | 1,073,741,824 | 7.4% |
| Tera (T) | 1,000,000,000,000 | 1,099,511,627,776 | 9.9% |
| Peta (P) | 10¹⁵ | 1,125,899,906,842,624 | 12.6% |
The drive contains exactly what the manufacturer advertised — 1,000,000,000,000 bytes (1 trillion bytes). This is 1 terabyte in the SI decimal definition that hard drive manufacturers use.
Windows, however, displays storage in binary units while calling them by SI names. Converting the manufacturer's 1,000,000,000,000 bytes to Windows's binary display:
1,000,000,000,000 ÷ 1,073,741,824 = 931.32 GiB
Windows displays this as "931 GB" — which looks like missing storage but is actually just a unit conversion difference. No storage is missing.
| Unit | Storage Equivalent |
|---|---|
| 1 Byte | One ASCII character — a letter, digit, or punctuation mark |
| 1 KB | Approximately half a page of plain text |
| 1 MB | One short MP3 song (1 minute) or ~500 pages of text |
| 3–5 MB | A typical MP3 song (3–4 minutes at 128 kbps) |
| 4–8 MB | A standard JPEG photograph from a smartphone |
| 1 GB | ~230 MP3 songs or ~1,000 ebooks |
| 4.7 GB | A standard single-layer DVD capacity |
| 10–15 GB | A typical HD movie download (1080p) |
| 1 TB | ~250,000 MP3 songs or ~250 HD movies or ~500,000 photos |
| 1 PB | ~13.3 years of HD video played continuously |
| File Size | 10 Mbps | 100 Mbps | 1 Gbps |
|---|---|---|---|
| 100 MB (800 Mb) | 80 sec | 8 sec | 0.8 sec |
| 1 GB (8 Gb) | 800 sec (13 min) | 80 sec | 8 sec |
| 4 GB (32 Gb) | ~53 min | ~5 min | 32 sec |
| 50 GB (400 Gb) | ~11 hrs | ~67 min | ~7 min |
Yes. This online data storage converter is 100% free with no registration, no subscription, and no payment required. Convert as many values as you need.
In decimal (SI) — used by storage manufacturers: 1 GB = 1,000,000,000 bytes (10⁹). In binary (IEC) — used by operating systems: 1 GiB = 1,073,741,824 bytes (2³⁰). The 7.4% difference between these two values explains why a hard drive advertised as 1 GB shows slightly less in your operating system.
Because manufacturers use decimal gigabytes (1 GB = 1,000,000,000 bytes) while Windows displays storage in binary gibibytes (1 GiB = 1,073,741,824 bytes) but calls them "GB." Converting 1,000,000,000,000 bytes: 1,000,000,000,000 ÷ 1,073,741,824 = 931.32 GiB. No storage is missing — it is purely a unit definition difference.
A kilobyte (KB) in the SI decimal definition equals exactly 1,000 bytes. A kibibyte (KiB) in the IEC binary definition equals exactly 1,024 bytes (2¹⁰). The IEC introduced the "kibi," "mebi," "gibi" prefixes in 1998 to eliminate ambiguity between these two definitions.
A megabit (Mb) equals 1,000,000 bits. A megabyte (MB) equals 8,000,000 bits — 8 times larger. Internet speeds are measured in megabits per second (Mbps). A 100 Mbps connection transfers 12.5 megabytes per second (MB/s). Always check whether a value uses a capital B (bytes) or lowercase b (bits).
In decimal (SI): 1 TB = 1,000 GB exactly. In binary (IEC): 1 TiB = 1,024 GiB exactly. Storage manufacturers use decimal; operating systems display binary values.
A typical smartphone JPEG photo is 3–6 MB. At 4 MB average, 1 GB (1,000 MB) holds approximately 250 photos. RAW photos from professional cameras (25 MB average) allow approximately 40 per GB. 4K video (approximately 350–400 MB per minute) allows about 2.5 minutes per GB.
One petabyte (PB) = 1,000 terabytes = 1,000,000 gigabytes = 10¹⁵ bytes. In practical terms, 1 petabyte can store approximately 13.3 years of HD video played continuously, or approximately 250,000 HD movies, or approximately 200 million pages of text. Facebook stores approximately 100+ PB of photos alone.
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