How do I convert bytes to kilobytes?

Multiply the byte value by 0.001. So x B × 0.001 = the equivalent in kB.

What is 5 bytes in kilobytes?

5 bytes equals 0.005 kilobytes.

What is 10 bytes in kilobytes?

10 bytes equals 0.01 kilobytes.

What is 100 bytes in kilobytes?

100 bytes equals 0.1 kilobytes.

How do I convert back from kilobytes to bytes?

Multiply the kilobyte value by 1000. For example, 1 kB = 1000 B.

Is the byte bigger than the kilobyte?

No. 1 byte is smaller than 1 kilobyte. It takes 1000 bytes to equal 1 kilobyte.

Are these conversion factors exact?

The factor is derived directly from the SI definitions of byte and kilobyte; the displayed value is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.

Bytes to Kilobytes Converter

1 B = 0.001 kB (byte → kilobyte)

1 B = 0.001 kB

1 byte equals 0.001 kilobytes. To convert bytes to kilobytes, multiply the byte value by 0.001. For quick reference: 1 B = 0.001 kB, 5 B = 0.005 kB, 10 B = 0.01 kB, 100 B = 0.1 kB.

From

0.001

FormulaKilobytes = Bytes × 0.001

Quick

When to use bytes → kilobytes

Bytes to kilobytes divides by 1000 under the decimal (SI/IEC) convention this site uses by default — the convention disk-capacity marketing and most modern OS file managers follow. Older Windows versions (up to Vista) used 1024 instead, which is technically the kibibyte (KiB); that's why a '1 GB' USB stick sometimes shows as 931 'MB' in an old file browser — same bytes, different divisor.

Front-end developers watch this conversion closely when budgeting a page's asset weight: a performance target of under 200 kB of JavaScript is 200,000 bytes, and a bundler's raw byte-count output has to be divided by 1000 (not 1024) to check against that budget correctly if the target follows the decimal convention this site uses. Getting the wrong divisor by even 2.4% can make a bundle look compliant when it quietly exceeds the real performance budget.

How to convert bytes to kilobytes

Take your value
Start with your value in bytes.
Multiply by 0.001
Multiply the byte value by 0.001. This is the exact conversion factor from bytes to kilobytes.
Read the result
The product is your value in kilobytes. For example, 5 B × 0.001 = 0.005 kB.

Conversion formula

The exact factor from bytes to kilobytes is 0.001.

Kilobytes = Bytes × 0.001

Bytes to Kilobytes conversion table

Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.

Conversion table from bytes to kilobytes
Bytes (B)	Kilobytes (kB)
1 B	0.001 kB
8 B	0.008 kB
16 B	0.016 kB
64 B	0.064 kB
100 B	0.1 kB
256 B	0.256 kB
500 B	0.5 kB
512 B	0.512 kB
1000 B	1 kB
1024 B	1.024 kB
2000 B	2 kB
2048 B	2.048 kB
4096 B	4.096 kB
5000 B	5 kB
8192 B	8.192 kB
10000 B	10 kB
16384 B	16.384 kB
25000 B	25 kB
32768 B	32.768 kB
50000 B	50 kB
65536 B	65.536 kB
100000 B	100 kB
131072 B	131.07 kB
250000 B	250 kB
500000 B	500 kB
524288 B	524.29 kB
1000000 B	1000 kB
1048576 B	1048.6 kB
2000000 B	2000 kB
5000000 B	5000 kB
10000000 B	10000 kB
50000000 B	50000 kB
100000000 B	100000 kB
500000000 B	500000 kB
1000000000 B	1000000 kB
2000000000 B	2000000 kB
5000000000 B	5000000 kB
10000000000 B	10000000 kB
50000000000 B	50000000 kB
100000000000 B	100000000 kB
500000000000 B	500000000 kB
1000000000000 B	1000000000 kB
2000000000000 B	2000000000 kB
5000000000000 B	5000000000 kB
10000000000000 B	10000000000 kB
100000000000000 B	100000000000 kB
1000000000000000 B	1000000000000 kB
10000000000000000 B	10000000000000 kB
100000000000000000 B	100000000000000 kB
1000000000000000000 B	1.0000 × 10^15 kB

Real-world reference

A single ASCII character is 1 byte. A small SVG icon is around 1 kB.

Frequently asked questions

How many kilobytes are in 1 byte?: 1 byte equals 0.001 kilobytes.
How do I convert bytes to kilobytes?: Multiply the byte value by 0.001. So x B × 0.001 = the equivalent in kB.
What is 5 bytes in kilobytes?: 5 bytes equals 0.005 kilobytes.
What is 10 bytes in kilobytes?: 10 bytes equals 0.01 kilobytes.
What is 100 bytes in kilobytes?: 100 bytes equals 0.1 kilobytes.
How do I convert back from kilobytes to bytes?: Multiply the kilobyte value by 1000. For example, 1 kB = 1000 B.
Is the byte bigger than the kilobyte?: No. 1 byte is smaller than 1 kilobyte. It takes 1000 bytes to equal 1 kilobyte.
Are these conversion factors exact?: The factor is derived directly from the SI definitions of byte and kilobyte; the displayed value is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.

About the byte and the kilobyte

The byte

A byte is 8 bits — the smallest addressable unit on virtually every modern computer. ASCII text is one byte per character; UTF-8 ranges from 1 to 4 bytes per character.

The kilobyte

The kilobyte (kB) equals exactly 1,000 bytes in the SI/IEC decimal convention. Most modern OS file managers and storage-vendor marketing use this definition. Older operating systems (Windows up to Vista) used 1 kB = 1,024 B — that value is now strictly called the kibibyte (KiB).