1.3 · Lesson 2 of 3
Calculating file size
Syllabus 1.3.2
What this lesson covers
- Calculate the file size of an image and a sound file, using 1024
Key vocabulary
- File size
- How much storage a file needs, found by multiplying the number of items by the bits for each item.
- Metadata
- Data about a file, such as its width, height or creation date. It makes real files slightly larger than calculated.
- Colour depth
- The number of bits used for each pixel in an image.
- Sample rate
- The number of sound samples taken each second.
- Sample resolution
- The number of bits used for each sound sample.
- Kibibyte (KiB)
- 1024 bytes.
- Mebibyte (MiB)
- 1024 kibibytes.
Check your learning
- Quick check: 4 questions
- Key vocabulary test: 7 terms
- Activity 1: Image file size · 8 questions
- Activity 2: Sound file size · 8 questions
- Activity 3: File size quiz · 8 questions