Data Storage Converter
Convert bytes, kilobytes, megabytes, gigabytes, and terabytes.
How to use this data storage converter
- Enter the storage amount
Type the number into the Storage value field.
- Select the source unit
Choose bytes, KB, MB, GB, or TB from the From unit dropdown.
- Select the target unit
Choose the unit you want to convert into from the To unit dropdown.
- Read the result
The Converted value and the Equivalent bytes figure appear instantly.
How this data storage converter works
This data storage converter translates values between bytes, kilobytes, megabytes, gigabytes, and terabytes using the decimal (SI) convention where each step is a factor of 1,000. That means 1 MB is 1,000,000 bytes and 1 GB is 1,000,000,000 bytes, matching the official SI definitions used by standards bodies and most storage-device marketing. The tool converts by normalizing the input to bytes first, then dividing by the target unit's byte count.
converted = value × (source unit in bytes ÷ target unit in bytes)
Byte equivalents:
1 KB = 1,000 bytes (10³)
1 MB = 1,000,000 bytes (10⁶)
1 GB = 1,000,000,000 bytes (10⁹)
1 TB = 1,000,000,000,000 bytes (10¹²) Convert 4.5 GB to megabytes: 4.5 GB × 1,000 MB/GB = 4,500 MB. Convert 2,500 MB to gigabytes: 2,500 ÷ 1,000 = 2.5 GB. Convert 1 TB to bytes: 1 × 10¹² = 1,000,000,000,000 bytes. Convert 750,000 KB to GB: first to bytes = 750,000 × 1,000 = 750,000,000 bytes, then to GB = 750,000,000 ÷ 1,000,000,000 = 0.75 GB.
A 128 GB phone has 128,000 MB of storage (128 × 1,000). If average apps are about 200 MB each, that is roughly 640 apps before other files are considered.
Convert 5 TB to megabytes: 5 × 1,000,000 = 5,000,000 MB. Enter 5 in the Storage value field, choose TB as the From unit, and MB as the To unit.
- ✓ All conversions use the decimal (power-of-1,000) convention. If you need binary units, use KiB, MiB, GiB, and TiB instead of KB, MB, GB, and TB.
- ✓ Operating systems and developer tools sometimes display binary quantities while still labeling them as MB or GB, which can create apparent mismatches with this tool.
- ✓ Bit-level units (kilobits, megabits) are not included here. For bandwidth-related conversions involving bits, use the Download Time Calculator.
- ✓ The converter handles whole and fractional inputs and preserves full floating-point precision internally.
- A hard drive labeled '1 TB' by the manufacturer usually uses the decimal definition (1 trillion bytes). Some operating systems then display that same capacity as about 931 GiB under a binary convention.
- RAM and low-level memory sizing are often discussed in binary quantities, which is why MiB and GiB remain common in technical contexts.
- Cloud storage quotas vary — some providers measure in decimal (GB) while others publish binary quantities (GiB). Check the provider's documentation if exact capacity matters.
- When estimating how many photos or songs fit on a drive, remember that file system overhead (metadata, formatting) typically consumes 1–5% of the raw capacity.
- International Electrotechnical Commission (IEC) 80000-13 — Quantities and units for information science and technology
- National Institute of Standards and Technology (NIST) — Prefixes for binary multiples
- IEEE 1541-2002 — Standard for Prefixes for Binary Multiples
Decimal versus binary storage conventions
When you buy a 256 GB flash drive, the manufacturer means 256 billion bytes — a decimal definition where each prefix step multiplies by 1,000. However, many operating systems count using powers of 1,024, an artefact of binary computing. Under that convention the same 256 billion bytes display as roughly 238 GiB. The IEC introduced distinct prefixes — kibibyte (KiB), mebibyte (MiB), gibibyte (GiB), tebibyte (TiB) — to avoid confusion, but everyday language has been slow to adopt them. This converter uses the decimal (SI) convention throughout, which matches drive labelling, cloud-storage marketing, and most consumer-facing documentation.
Practical storage benchmarks
Knowing a few real-world reference points makes data-storage conversions more intuitive. A typical high-resolution smartphone photo is 3–8 MB, a four-minute song in compressed format is about 4 MB, and an hour of HD video is roughly 1.5–4 GB depending on codec and bitrate. A standard Blu-ray disc holds 25 or 50 GB, while modern SSDs commonly ship in 512 GB, 1 TB, and 2 TB capacities. Cloud plans often start at 5–15 GB of free storage. Keeping these anchors in mind helps you quickly sanity-check any conversion result.
Data storage converter FAQs
Why does my new hard drive show less space than advertised?
Drive manufacturers usually use decimal units (1 GB = 1,000,000,000 bytes), while some operating systems display the same byte count in binary quantities such as GiB. A 500 GB drive therefore appears as about 465.66 GiB. This converter uses decimal KB/MB/GB/TB.
What is the difference between GB and GiB?
GB (gigabyte) means 1,000,000,000 bytes under the SI decimal definition. GiB (gibibyte) means 1,073,741,824 bytes under the IEC binary definition. This tool uses decimal GB; GiB is the binary alternative.
Should I use binary or decimal for bandwidth calculations?
Bandwidth is almost always quoted in decimal: 100 Mbps means 100,000,000 bits per second. This tool also uses decimal file-size units, which keeps storage and bandwidth on the same SI scale.
How many megabytes are in a gigabyte?
In this tool and under the SI decimal standard, 1 GB = 1,000 MB. Under the binary IEC standard, 1 GiB = 1,024 MiB.
Why are there two different conventions for measuring data?
Binary grouping arose naturally from computer hardware built on powers of 2, while decimal prefixes follow the SI metric system where kilo, mega, and giga always mean powers of 1,000. The IEC introduced KiB, MiB, and GiB so technical writing can distinguish binary quantities from decimal ones.