Kilobytes to Bytes

Convert KB to bytes instantly — decimal (SI), with a table, common file sizes, and a live calculator.

1 KB equals 1000 bytes.

Updated Open the Unit Converter →

Convert any amount

Result (bytes)1000 bytes

KB to bytes table

KBbytes
1 KB1000 bytes
2 KB2000 bytes
3 KB3000 bytes
5 KB5000 bytes
10 KB10000 bytes
15 KB15000 bytes
20 KB20000 bytes
25 KB25000 bytes
30 KB30000 bytes
40 KB40000 bytes
50 KB50000 bytes
60 KB60000 bytes
75 KB75000 bytes
90 KB90000 bytes
100 KB100000 bytes
120 KB120000 bytes
150 KB150000 bytes
200 KB200000 bytes
250 KB250000 bytes
300 KB300000 bytes
400 KB400000 bytes
500 KB500000 bytes

bytes to KB (reverse)

bytesKB
1 bytes0.001 KB
2 bytes0.002 KB
3 bytes0.003 KB
5 bytes0.005 KB
10 bytes0.01 KB
15 bytes0.015 KB
20 bytes0.02 KB
25 bytes0.025 KB
30 bytes0.03 KB
40 bytes0.04 KB
50 bytes0.05 KB
60 bytes0.06 KB
75 bytes0.075 KB
90 bytes0.09 KB
100 bytes0.1 KB
120 bytes0.12 KB
150 bytes0.15 KB
200 bytes0.2 KB
250 bytes0.25 KB
300 bytes0.3 KB
400 bytes0.4 KB
500 bytes0.5 KB

Common file sizes

KBbytes
5 KB5000 bytes
10 KB10000 bytes
25 KB25000 bytes
50 KB50000 bytes
75 KB75000 bytes
100 KB100000 bytes
120 KB120000 bytes
150 KB150000 bytes
200 KB200000 bytes
300 KB300000 bytes
400 KB400000 bytes
500 KB500000 bytes

How it scales

2500050000750001000000255075100KB

1 GB in other units

1000MB1000000KB1000000000bytes

The ratio at a glance

1 KB1000 bytes

Decimal vs. binary — why 1 GB isn't always 1 GB

This page uses the decimal (SI) convention: 1 KB = 1000 bytes, 1 MB = 1000 KB, 1 GB = 1000 MB, and 1 TB = 1000 GB. That is how hard-drive and SSD makers, Google, and macOS state capacity. Windows and RAM, by contrast, use the binary (IEC) convention, where 1 KiB = 1024 bytes and 1 GiB = 1024 MiB. The gap grows with size: 1 GiB = 1.073741824 GB, which is why a 1 TB drive (1000 GB) shows as about 931 GiB in Windows. No storage is missing — these are simply two different measuring systems.

Data-storage conversions are exact and rest on fixed factors — for more unit pairs, use our data storage conversion hub.

Related conversions

Frequently asked questions

How many bytes are in 1 KB?

1 KB equals 1000 bytes.

How many bytes are in 2 KB?

2 KB equal 2000 bytes.

How do I convert KB to bytes?

Multiply the amount in KB by 1000 to get bytes.

Is 1 GB equal to 1000 MB or 1024 MB?

On this page we use the decimal (SI) convention: 1 GB = 1000 MB, 1 MB = 1000 KB, and so on. That is what storage manufacturers, Google, and macOS use. The binary (IEC) convention (1 GiB = 1024 MiB), used by Windows and RAM, gives different numbers: 1 GiB = 1.073741824 GB.

Why does my computer show less space?

Hard-drive and SSD makers state capacity in decimal units (1 TB = 1000 GB = 1,000,000,000,000 bytes). Windows, however, counts in binary and reports the same capacity as GiB (dividing by 1024 instead of 1000). So a 1 TB drive shows as about 931 GiB in Windows — no space is missing, it is just a different unit (1 GiB = 1.073741824 GB). macOS has shown decimal GB since OS X 10.6.

What are these data-storage units used for?

Bytes and bits are the smallest units — 1 byte = 8 bits; bits per second measure bandwidth. Kilobytes (KB) and megabytes (MB) describe documents, photos, and songs; gigabytes (GB) and terabytes (TB) describe hard drives, SSDs, and data plans. All values here are decimal (SI).

Convert any unit

The unit converter handles length, volume, weight, and more.

Open Unit Converter →