Amount & Unit
Decimal Standard (SI - Base 1000)
Used by HDD, SSD, USB flash manufacturers and networks (1 KB = 1,000 Bytes).
Binary Standard (IEC - Base 1024)
Used by operating systems like Windows and RAM memory (1 KiB = 1,024 Bytes).
Estimated Download & Transfer Time
Estimated time
27 seconds
Taxa de transferência constante a 300 Mbps
Why does my 1 TB drive show only ~931 GB on Windows?
Drive manufacturers rate storage using decimal powers (1 TB = 1,000,000,000,000 Bytes). Windows calculates capacity using binary powers (1 TiB = 1.099.511.627.776 Bytes) while labeling it as GB. Dividing 1 trillion by 1,024³ yields approximately 931.32 GB.
How it works
1
Enter the number you want to convert.
2
Select the source unit (decimal like MB/GB or binary like MiB/GiB).
3
Inspect instant conversions across all decimal and binary units with one-click copy.
4
Check estimated download and transfer time based on your connection speed.
Frequently asked questions
Is it really free?
Yes. The site is supported by ads, so you never pay or need to create an account.
What is the difference between KB and KiB?
KB (Kilobyte) is the decimal standard (1 KB = 1,000 Bytes = 10³), while KiB (Kibibyte) is the IEC binary standard (1 KiB = 1,024 Bytes = 2¹⁰). The same distinction applies to MB vs MiB, GB vs GiB, and TB vs TiB.
Why do hard drives show smaller capacity on Windows?
Drive manufacturers advertise capacity in decimal powers (1 TB = 1,000,000,000,000 Bytes). Windows calculates capacity using binary powers (1 TiB = 1,024³ Bytes) while still labeling it GB, which results in approximately 931.3 GB.
Does it work on mobile?
Yes. The page adapts to your screen and does not require installing any app.