Kilobytes to bytes converter
Convertersconversion pair
Convert kilobytes to bytes instantly: 1 KB is 1,000 bytes. Code, limits and storage, with the exact math and one-click copying.
a kilobyte is 1,000 bytes — the limit hiding in every form field.
work surface
Math, not advice — results are indicative. Read the disclaimer.
pro tips
Multiply by 1,000: 64 KB is 64,000 bytes. Or 65,536 in binary KiB.
A 48 KB image is 48,000 decimal bytes and 49,152 binary — same file, two rulers.
When a limit is byte-exact, convert before you test, not after.
what it does
One kilobyte is 1,000 bytes. Multiply kilobytes by 1,000 and the bytes appear, which is what happens when a size shown in KB meets an API, a limit or a byte-counting system.
It shows up when a form allows "64 KB" but the backend measures bytes, when a log is displayed in kilobytes and processed in bytes, when a file size has to be checked against a byte-exact limit, and in any interface where the human-facing unit has to be converted back to machine terms.
The shortcut: 1 KB is 1,000 bytes, 2 KB is 2,000, and a 48 KB image is 48,000 bytes — or 49,152 in binary KiB, which is why the same file reports two sizes. Keeping decimal and binary straight is the entire trick.
Type any kilobyte value and the widget answers in bytes instantly, with the math on screen. Click to copy, and swap when a byte count has to be rolled up into kilobytes.
quick answers
How many bytes are in a kilobyte?
1,000 decimal, 1,024 binary.
Is 1 KB exactly 1,024 bytes?
Only in the binary convention; that's a kibibyte. Decimal is 1,000.
Why convert kilobytes to bytes?
Because interfaces show KB while limits, APIs and code count bytes.