💾 Data Converter
Convert between KB, MB, GB, and TB instantly.
Ever wondered how many megabytes are in a terabyte, or whether that 5 GB game will fit on your 256 GB SSD? Our Data Converter makes it effortless. Convert instantly between Kilobytes (KB), Megabytes (MB), Gigabytes (GB), and Terabytes (TB) — no complicated math required.
Here’s a practical example: you’re shopping for a new phone and see a plan offering 50 GB of data, but your current usage is tracked in MB. Enter 50 in the value field, select GB as “From” and MB as “To” — the result shows you 50 GB = 50,000 MB, giving you a much clearer picture of your monthly allowance.
This converter is invaluable across many scenarios. Photographers and videographers use it to estimate storage needs — a single RAW photo might be 25 MB, and knowing how many fit on a 1 TB drive helps plan shoots. Developers use it when evaluating cloud storage tiers or bandwidth limits. And anyone managing home media libraries, game collections, or backup drives will find it essential for capacity planning.
The converter uses the standard decimal (SI) convention where 1 KB = 1,000 bytes, 1 MB = 1,000 KB, and so on. This matches how hard drive manufacturers, cloud storage providers, and most operating systems display file sizes, so the numbers you see here will align with what you see on your devices.
How the conversion works
This tool converts storage sizes using the decimal (SI) convention, the standard used by hard drive manufacturers, SSD vendors, cloud storage providers, and the vast majority of operating systems when they display file sizes. In the SI system every step is a power of 1,000:
- 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 = 1,000,000,000,000 bytes
Internally the converter reduces every input to a common base. Each unit is assigned a base factor — KB = 1, MB = 1,000, GB = 1,000,000, TB = 1,000,000,000 — then the value is multiplied by its own unit's factor and divided by the target unit's factor. For example, converting 3 GB to KB multiplies 3 by 1,000,000 and divides by 1, so the result is 3,000,000 KB.
It is worth knowing that this decimal approach differs from the binary (IEC) convention used for RAM and some system memory: 1 KiB = 1,024 bytes, 1 MiB = 1,024 KiB, and so on. The tool follows SI throughout, so the numbers you get here match what storage devices and most OS file managers report.
Worked examples
Here are a few conversions you can check by hand to build confidence in the tool:
- 50 GB to MB: 50 × 1,000 = 50,000 MB. That is the classic mobile data-plan question — a 50 GB monthly allowance is exactly 50,000 MB.
- 2 TB to GB: 2 × 1,000 = 2,000 GB, roughly what a large external backup drive holds.
- 1.5 GB to KB: 1.5 × 1,000,000 = 1,500,000 KB.
- 500 MB to GB: 500 ÷ 1,000 = 0.5 GB, so a 500 MB download is half a gigabyte.
A practical storage scenario: suppose each RAW photo you shoot takes about 25 MB. On a 1 TB drive you have 1,000,000 MB to work with, so 1,000,000 ÷ 25 = 40,000 photos fit on that single disk. That kind of quick estimate is exactly what photographers use to plan a shoot without running out of space mid-session.
Edge cases & limitations
- Decimal vs. binary: This tool is strictly decimal. If you are working with binary units (KiB, MiB, GiB where 1 KiB = 1,024 bytes), the values here will differ slightly from what a binary-based calculator returns — the difference grows at each higher unit.
- Large numbers and decimals: The result is displayed to up to 6 decimal places. Converting a small unit to a large one (say, 1 KB to TB) produces a tiny decimal like 0.000001 TB, so you may want to round for real-world use.
- Storage vs. RAM: Storage media and cloud services advertise in SI units, which this tool matches. RAM and memory chips, however, are usually measured in binary units, which is one reason a "256 GB" SSD and a "256 GB" RAM stick do not describe the same kind of counting.
- MB vs. Mb (megabyte vs. megabit): A byte is 8 bits. Network speeds are almost always quoted in bits (Mbps), while file sizes are quoted in bytes (MB). So 100 Mbps ≈ 12.5 MB/s — confusing the two will make your download-time estimates eight times too optimistic.
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Does this converter use decimal (SI) or binary (IEC) units?
This tool uses the decimal (SI) convention where 1 KB = 1,000 bytes, 1 MB = 1,000 KB, and so on. This matches how hard drives, SSDs, cloud storage providers, and most operating systems report file sizes. If you need binary units (KiB, MiB, GiB where 1 KiB = 1,024 bytes), you may see slightly different numbers.
Can I convert between more than two units at once?
This converter handles one conversion at a time — pick a "From" unit and a "To" unit. To see multiple conversions, simply change the unit and the result updates instantly. For example, convert GB to MB first, then switch to TB to see the same value in terabytes.
Why does the result show many decimal places?
The converter displays up to 6 decimal places for precision. For example, converting 1 KB to MB gives 0.001000 MB. Most practical uses will only need the first few digits, so feel free to round mentally — or use the copy button to grab the exact value.
What real-world scenarios is this converter useful for?
It's great for estimating storage requirements (how many files fit on a drive), understanding data plans (what does 50 GB really mean in MB?), comparing cloud storage tiers, planning backup strategies, and converting specs when shopping for electronics. Photographers, developers, and IT professionals use it daily.
What's the difference between MB and Mb?
MB (megabyte) and Mb (megabit) are often confused. A byte is made up of 8 bits, so 1 MB = 8 Mb. Network speeds are typically quoted in megabits per second (Mbps), while file sizes are quoted in megabytes (MB). As a rule of thumb, 100 Mbps transfers roughly 12.5 MB per second — divide by 8 to convert a speed in Mbps into MB/s.
Why does Windows sometimes show a different number than the drive manufacturer?
Windows displays capacities using binary units (where 1 GB = 1,024 MB) for some views, while drive manufacturers advertise in decimal units (1 GB = 1,000 MB). That's why a drive sold as "1 TB" can appear as roughly 931 GB in Windows — not because anything is missing, but because the two use different base counting systems.
Do you support KiB, MiB, or GiB?
No. This converter is strictly decimal (SI) and only accepts KB, MB, GB, and TB, where 1 KB = 1,000 bytes. The binary equivalents (KiB, MiB, GiB, where 1 KiB = 1,024 bytes) are intentionally out of scope, so if you need binary units you'll need a different calculator.
How do I work out how many files will fit on a drive?
Divide the drive's capacity in a given unit by the average file size in the same unit. For example, a 1 TB drive holds 1,000,000 MB, and if each of your files averages 25 MB, you can fit 1,000,000 ÷ 25 = 40,000 files. Always convert both numbers to the same unit first — that's exactly what this converter is for.
About the author
This page is maintained by Aren Breur, who builds and maintains ConvertAny.app — a collection of fast, free browser-based tools designed for everyday conversions. If you spot an error, have a suggestion, or want to request a new tool, you can reach Aren directly at aren2connect@gmail.com.