One kilo byte (KB) is around 1024 bytes. Although the prefix kilo (decimal system) means 1,000 in metrics, in computing which uses a binary (base-2) system, a kilobyte is defined as bytes, which equals 1024 bytes.
1 KB = 1024 Bytes
1 MB = 1024 KB
1 GB = 1024 MB
Quick Info: Though there are also manufacturers that prefer to count a kilobyte using 1000 bytes (or a kibibyte (KiB) of 1024 bytes to be precise), in standard computing usage and on exams, 1024 bytes is the correct response.