Is a KB kilobyte bigger than a MB megabyte

The answer is no.

First of all, remember that the binary system is used in computers and electronics.

Kilobyte is the unit byte for digital information. 1 Kilobyte is equal to 1000 bytes in decimal (base 10) and 1024 bytes in binary (base 2). The unit symbol of Kilobyte is KB.

Megabyte is a multiple of the unit byte for digital information with prefix mega (10⁶). The unit symbol of Megabyte is MB.

1 KB (Kilobyte) is equal to 0.001 MB in decimal and 0.0009765625 MB in binary. It also means that 1 megabyte is equal to 1000 kilobytes in decimal and 1024 kilobytes in binary.

1 Megabyte is also equal to 1.000.000 bytes in decimal and 1.048.576 bytes in binary. 

So as you can see, a Megabyte is one thousand times bigger than a Kilobyte.