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.
Bytes to Bits Converter
1 B = 8 bit (byte → bit)
1 B = 8 bit
1 byte equals 8 bits. To convert bytes to bits, multiply the byte value by 8. For quick reference: 1 B = 8 bit, 5 B = 40 bit, 10 B = 80 bit, 100 B = 800 bit.
Formula
Bits = Bytes × 8Quick
When to use bytes → bits
Bytes to bits multiplies by 8. This is the conversion behind every 'why is my download slower than my internet speed' question: a 500 Mbps connection is 62.5 MB/s, not 500 MB/s, because ISPs market in bits and file managers report in bytes. Cryptographic key lengths (AES-256, RSA-2048) are also quoted in bits — an AES-256 key is 32 bytes of actual data, and confusing the two units when sizing a key-storage field is a classic off-by-8× bug.
Protocol designers multiply by 8 when packing a byte-oriented payload into a bit-counted frame — a 20-byte TCP header is 160 bits of overhead on every packet, which matters when budgeting a low-bandwidth IoT radio link. RAM chips are also spec'd both ways: a 512 MB module is 4,294,967,296 bits of storage. Firmware developers keep the two scales straight because register widths (bits) and buffer sizes (bytes) live in the same code and are easy to swap by mistake.
How to convert bytes to bits
Take your value
Start with your value in bytes.
Multiply by 8
Multiply the byte value by 8. This is the exact conversion factor from bytes to bits.
Read the result
The product is your value in bits. For example, 5 B × 8 = 40 bit.
Conversion formula
The exact factor from bytes to bits is 8.
Bits = Bytes × 8
Bytes to Bits conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Bytes (B) | Bits (bit) |
|---|---|
| 1 B | 8 bit |
| 8 B | 64 bit |
| 16 B | 128 bit |
| 64 B | 512 bit |
| 100 B | 800 bit |
| 256 B | 2048 bit |
| 500 B | 4000 bit |
| 512 B | 4096 bit |
| 1000 B | 8000 bit |
| 1024 B | 8192 bit |
| 2000 B | 16000 bit |
| 2048 B | 16384 bit |
| 4096 B | 32768 bit |
| 5000 B | 40000 bit |
| 8192 B | 65536 bit |
| 10000 B | 80000 bit |
| 16384 B | 131072 bit |
| 25000 B | 200000 bit |
| 32768 B | 262144 bit |
| 50000 B | 400000 bit |
| 65536 B | 524288 bit |
| 100000 B | 800000 bit |
| 131072 B | 1048576 bit |
| 250000 B | 2000000 bit |
| 500000 B | 4000000 bit |
| 524288 B | 4194304 bit |
| 1000000 B | 8000000 bit |
| 1048576 B | 8388608 bit |
| 2000000 B | 16000000 bit |
| 5000000 B | 40000000 bit |
| 10000000 B | 80000000 bit |
| 50000000 B | 400000000 bit |
| 100000000 B | 800000000 bit |
| 500000000 B | 4000000000 bit |
| 1000000000 B | 8000000000 bit |
| 2000000000 B | 16000000000 bit |
| 5000000000 B | 40000000000 bit |
| 10000000000 B | 80000000000 bit |
| 50000000000 B | 400000000000 bit |
| 100000000000 B | 800000000000 bit |
| 500000000000 B | 4000000000000 bit |
| 1000000000000 B | 8000000000000 bit |
| 2000000000000 B | 16000000000000 bit |
| 5000000000000 B | 40000000000000 bit |
| 10000000000000 B | 80000000000000 bit |
| 100000000000000 B | 800000000000000 bit |
| 1000000000000000 B | 8.0000 × 10^15 bit |
| 10000000000000000 B | 8.0000 × 10^16 bit |
| 100000000000000000 B | 8.0000 × 10^17 bit |
| 1000000000000000000 B | 8.0000 × 10^18 bit |
Real-world reference
A single ASCII character is 1 byte. A small SVG icon is around 1 kB. In bits, that gives you: 1 B = 8 bit, 10 B = 80 bit, 100 B = 800 bit.
Frequently asked questions
- How many bits are in 1 byte?
- 1 byte equals 8 bits.
- How do I convert bytes to bits?
- Multiply the byte value by 8. So x B × 8 = the equivalent in bit.
- What is 5 bytes in bits?
- 5 bytes equals 40 bits.
- What is 10 bytes in bits?
- 10 bytes equals 80 bits.
- What is 100 bytes in bits?
- 100 bytes equals 800 bits.
- How do I convert back from bits to bytes?
- Multiply the bit value by 0.125. For example, 1 bit = 0.125 B.
- Is the byte bigger than the bit?
- Yes. 1 byte is larger than 1 bit — specifically 8 times larger.
- Are these conversion factors exact?
- The factor is derived directly from the SI definitions of byte and bit; the displayed value is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.
About the byte and the bit
The bit
A bit is the smallest unit of digital information — a single 0 or 1. Eight bits make one byte. The bit is the natural unit for bandwidth (most network speeds are quoted in bits per second, not bytes).