Why 1024 bytes is 1 kilobyte

Satya Prakash
1 min readApr 18, 2021

Hi,

It started all with a user name for admin in a portal. I thought “manage” name instead of admin and I named it “mismanage”.

Today I start with a crafty question every one faces once started computing!

Many people think that there are 1000 bytes in a kilobyte. After all, “kilo” means 1000. In most cases, this approximation is fine for determining how much space a file takes up or how much disk space you have.

But there are really 1024 bytes in a kilobyte. The reason for this is because computers are based on the binary system. That means hard drives and memory are measured in powers of 2.

For example,
2⁰ = 1

2¹ = 2

2² = 4

2³ = 8

2⁴ = 16

2⁵ = 32

2⁶ = 64

2⁷ = 128

2⁸ = 256

2⁹ = 512

2¹⁰ = 1024

Memory Sticks

Notice how 2¹⁰ is 1024. Therefore, 2¹⁰, or 1024 bytes compose one kilobyte. Furthermore, 1024 kilobytes compose one megabyte, and 1024 megabytes compose one gigabyte. For most practical purposes, you can estimate 1024 to 1000.

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Satya Prakash
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from 1995 to 2021 and still going - working in the world of computer science and now wants to share the experiences.