Bytes to bits converter
Convertersconversion pair
Convert bytes to bits instantly: 1 byte is 8 bits. File sizes, transfer times and network specs, with the exact math and a copy button.
1 B is 8 bits — the multiply that explains every download estimate ever.
work surface
Math, not advice — results are indicative. Read the disclaimer.
pro tips
The anchor: 1 B = 8 b. Bytes up, bits down; the 8 goes both ways.
Download math: file MB times 8, divided by line Mbps, is roughly seconds — plus the universe's overhead.
1 KB is 8,000 bits — decimal kilobytes, the ones your browser actually uses.
what it does
The bytes-to-bits trick multiplies by 8. It connects what files weigh (bytes) to what lines carry (bits), and it's the only math standing between a "50 MB file" and the time it actually takes to download.
It shows up wherever transfer times get estimated: a 700 MB movie over a 100 Mbps line (5,600 megabits to move, so at least 56 seconds if the universe behaves), modems rated in bits since forever, and backup jobs that quote bytes while the network speaks bits.
The rough version: multiply by 8 and let the download bar do the rest. For "how long will this take", bytes times 8 divided by megabits gives seconds — and the widget handles the first step exactly.
Type any byte number and the widget answers in bits instantly, math in the hint. Click the result to copy it, and hit swap when the wire takes over — the bits-to-bytes version divides by 8 and comes back down to file size.
quick answers
How many bits are in a byte?
8. The treaty number of computing, stable since byte-sized memory won the format wars.
Why multiply by 8 for download times?
Networks are rated in bits per second while files are sized in bytes, so the 8 is the toll between the two signs.
Is "b" bits or bytes?
Lowercase b is bits, capital B is bytes — the one capitalization rule networking enforces without mercy.
What is 1 MB in bits?
8,000,000 bits in decimal units — the marketing edition, and the one your ISP quotes.