What is a file size?
- File size is a measure of amount of space a file consumes on a storage medium.
- It is the amount any digital info consumes on storage devices like hard disk, pen drives etc..
- File size is expressed in units of measurement based on the byte.
- To know the file size of a file click on the file and press Alt + Enter.
File size measurement units and conversions:
| Unit | Value | Size |
|---|---|---|
| bit (b) | 0 or 1 | 1/8 of a byte |
| Byte (B) | 8 bits | 1 byte |
| KiloByte (KB) | 210 bytes | 1,024 bytes |
| MegaByte (MB) | 220 bytes | 1,048,576 bytes |
| GigaByte (GB) | 230 bytes | 1,073,741,824 bytes |
| TeraByte (TB) | 240 bytes | 1,099,511,627,776 bytes |
| PetaByte (PB) | 250 bytes | 1,125,899,906,842,624 bytes |
| ExaByte (EB) | 260 bytes | 1,152,921,504,606,846,976 bytes |
| ZettaByte (ZB) | 270 bytes | 1,180,591,620,717,411,303,424 bytes |
| YottaByte (YB) | 280 bytes | 1,208,925,819,614,629,174,706,176 bytes |
Why are file sizes important while using on web?
- Large file like images can make websites load slower.
- Use optimal file sizes to load, upload and download faster.
What factors effect the file size of the image?
- Pixel Dimensions or resolution ( Eg: 600 X 400 or 150ppi)
- Bit depth (number of bits per pixel used for color info)
- Format used to save the file. (compressed/uncompressed)
- Image Mode (when converted from RGB-24 to CMYK-32)