Calculation of file size

Question 1

Formula for calculating the size of a mono sound file

Answer 1

Sampling rate (Hz) * bit depth (bits) * length of sample (seconds)

Question 2

Formula for calculating the size of a stereo sound file

Answer 2

Sampling rate * bit depth * length of sample * 2

Question 3

What is sampling rate?

Answer 3

The number of samples taken per second. Measured in hertz

Question 4

What is bit depth / sampling resolution?

Answer 4

The number of bits used in each sample.

Question 5

Formula for calculating the size of image files

Answer 5

Image resolution (pixels) * colour depth (bits)

Question 6

What is image resolution?

Answer 6

The number of pixels in an image

Question 7

What is colour depth?

Answer 7

The number of bits used to represent a colour

Question 8

Number of bytes in a kilobyte

Answer 8

2^10 / 1024 bytes

Question 9

Number of bytes in a megabyte

Answer 9

2^20 / 1024 KB

Question 10

Number of bytes in a gigabyte

Answer 10

2^30 / 1024 MB

Question 11

Number of bytes in a terabyte

Answer 11

2^40 / 1024 GB

Question 12

Number of bytes in a petabyte

Answer 12

2^50 / 1024 TB