Convert Bit to Byte
1 bit = 0.125 byte (B). For example, 10 bit = 1.25 byte and 100 bit = 12.5 byte. Type any value below to convert bit to byte both ways — it runs entirely in your browser.
Quick answer: Bit to Byte
1 Bit = 0.125 Byte (bit → B). To convert bit to byte, multiply by 0.125. To convert byte to bit, multiply by 8. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common bit-to-byte questions.
How to convert Bit to Byte
To convert bit to byte, multiply the number of bit by the conversion factor 0.125, because 1 bit = 0.125 B. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 B = 8 bit, so you divide by 0.125 (or multiply by 8) to turn byte back into bit.
B = bit × 0.125 ·
bit = B × 8
- Write down the value you want to convert, in bit.
- Multiply it by 0.125.
- The result is the same area/length/quantity expressed in byte.
Bit to Byte — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 bit is 0.625 byte because 5 bit × 0.125 = 0.625 B.
| Bit | Calculation | Byte |
|---|---|---|
| 1 bit | 1 bit × 0.125 = 0.125 B | 0.125 B |
| 2 bit | 2 bit × 0.125 = 0.25 B | 0.25 B |
| 3 bit | 3 bit × 0.125 = 0.375 B | 0.375 B |
| 5 bit | 5 bit × 0.125 = 0.625 B | 0.625 B |
| 7 bit | 7 bit × 0.125 = 0.875 B | 0.875 B |
| 10 bit | 10 bit × 0.125 = 1.25 B | 1.25 B |
| 12 bit | 12 bit × 0.125 = 1.5 B | 1.5 B |
| 15 bit | 15 bit × 0.125 = 1.875 B | 1.875 B |
| 20 bit | 20 bit × 0.125 = 2.5 B | 2.5 B |
| 25 bit | 25 bit × 0.125 = 3.125 B | 3.125 B |
| 50 bit | 50 bit × 0.125 = 6.25 B | 6.25 B |
| 100 bit | 100 bit × 0.125 = 12.5 B | 12.5 B |
Common Bit to Byte conversions
These are the bit-to-byte values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 bit = 0.125 byte
- 2 bit = 0.25 byte
- 2.5 bit = 0.3125 byte
- 3 bit = 0.375 byte
- 4 bit = 0.5 byte
- 5 bit = 0.625 byte
- 6 bit = 0.75 byte
- 7 bit = 0.875 byte
- 8 bit = 1 byte
- 9 bit = 1.125 byte
- 10 bit = 1.25 byte
- 12 bit = 1.5 byte
- 15 bit = 1.875 byte
- 20 bit = 2.5 byte
- 25 bit = 3.125 byte
- 30 bit = 3.75 byte
- 50 bit = 6.25 byte
- 75 bit = 9.375 byte
- 100 bit = 12.5 byte
- 200 bit = 25 byte
- 500 bit = 62.5 byte
- 1000 bit = 125 byte
Bit to Byte conversion chart (both directions)
The chart below converts bit to byte and byte to bit side by side, so it works whichever way you need. 1 bit = 0.125 byte, and 1 byte = 8 bit.
| Bit → Byte | Byte → Bit |
|---|---|
| 0.25 bit = 0.03125 B | 0.25 B = 2 bit |
| 0.5 bit = 0.0625 B | 0.5 B = 4 bit |
| 1 bit = 0.125 B | 1 B = 8 bit |
| 2 bit = 0.25 B | 2 B = 16 bit |
| 3 bit = 0.375 B | 3 B = 24 bit |
| 4 bit = 0.5 B | 4 B = 32 bit |
| 5 bit = 0.625 B | 5 B = 40 bit |
| 6 bit = 0.75 B | 6 B = 48 bit |
| 7 bit = 0.875 B | 7 B = 56 bit |
| 8 bit = 1 B | 8 B = 64 bit |
| 9 bit = 1.125 B | 9 B = 72 bit |
| 10 bit = 1.25 B | 10 B = 80 bit |
| 12 bit = 1.5 B | 12 B = 96 bit |
| 15 bit = 1.875 B | 15 B = 120 bit |
| 20 bit = 2.5 B | 20 B = 160 bit |
| 25 bit = 3.125 B | 25 B = 200 bit |
| 30 bit = 3.75 B | 30 B = 240 bit |
| 40 bit = 5 B | 40 B = 320 bit |
| 50 bit = 6.25 B | 50 B = 400 bit |
| 75 bit = 9.375 B | 75 B = 600 bit |
| 100 bit = 12.5 B | 100 B = 800 bit |
| 150 bit = 18.75 B | 150 B = 1,200 bit |
| 200 bit = 25 B | 200 B = 1,600 bit |
| 250 bit = 31.25 B | 250 B = 2,000 bit |
| 500 bit = 62.5 B | 500 B = 4,000 bit |
| 1000 bit = 125 B | 1000 B = 8,000 bit |
Bit vs Byte: which is bigger?
A byte is the larger unit: one byte equals 8 bits. Put another way, you need 8 bits to make a single byte.
What is a Bit? History, origin and usage
The word “bit,” a contraction of “binary digit,” was coined by the statistician John W. Tukey in a 1947 Bell Labs memo and popularised by Claude Shannon in his landmark 1948 paper “A Mathematical Theory of Communication,” which founded information theory. A bit is the smallest unit of information: a single choice between two states, 0 or 1.
Bits measure information and data-transfer rates: network and internet speeds are quoted in kilobits, megabits or gigabits per second (kbit/s, Mbit/s, Gbit/s). Eight bits make a byte, the unit used for file and storage sizes.
One bit is the information content of a single yes/no answer when both outcomes are equally likely. Because data rates are counted in bits but file sizes in bytes, a “100 megabit” internet connection delivers only about 12.5 megabytes per second — a factor-of-eight gap that surprises many users.
What is a Byte? History, origin and usage
The byte was named by Werner Buchholz in June 1956 while he was designing IBM’s Stretch supercomputer; he deliberately spelled it “byte” rather than “bite” so it could not be mistaken for “bit.” Early bytes varied in size, but IBM’s hugely successful System/360 in the 1960s cemented the 8-bit byte as the standard.
The byte is the basic addressable unit of computer memory and the unit in which file and storage sizes are stated — kilobytes, megabytes, gigabytes and beyond. One byte holds one character of basic text, or a value from 0 to 255.
To remove ambiguity, an exactly-8-bit unit is formally called an “octet,” a term widely used in networking standards. The byte became 8 bits by convention rather than necessity — some early computers used bytes of 6, 7 or 9 bits before the System/360 set the norm.
Convert 1 Bit to other units
It can help to see a bit next to the other units it is commonly compared with. One bit (bit) is equal to:
| 1 Bit equals | Unit |
|---|---|
| 0.125 B | Byte |
| 0.000125 KB | Kilobyte |
| 0.000000125 MB | Megabyte |
| 0.000000000125 GB | Gigabyte |
| 0.000000000000125 TB | Terabyte |
| 0.0001220703 KiB | Kibibyte |
| 0.0000001192093 MiB | Mebibyte |
| 0.0000000001164153 GiB | Gibibyte |
Convert 1 Byte to other units
One byte (B) is equal to:
| 1 Byte equals | Unit |
|---|---|
| 8 bit | Bit |
| 0.001 KB | Kilobyte |
| 0.000001 MB | Megabyte |
| 0.000000001 GB | Gigabyte |
| 0.000000000001 TB | Terabyte |
| 0.0009765625 KiB | Kibibyte |
| 0.0000009536743 MiB | Mebibyte |
| 0.0000000009313226 GiB | Gibibyte |
Tips for converting Bit to Byte
- To go from bit to byte, multiply by 0.125; to go back, divide by 0.125 (or multiply by 8).
- For a quick mental estimate, remember that 1 bit ≈ 0.125 byte, so 10 bit ≈ 1.25 byte.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Bit to Byte converter
Type a number into the Bit field and the equivalent in Byte appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Byte field to convert the other way (byte to bit). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 bit = 0.125 B), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for bit-to-byte conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- NIST — Prefixes for binary multiples — the reference that separates the decimal prefixes (kB = 1,000 bytes) from the IEC binary ones (KiB = 1,024 bytes). This page keeps the two apart rather than silently mixing them, which is the usual source of disagreement between file sizes.
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
This converter uses the <strong>decimal (SI)</strong> convention for KB/MB/GB/TB (1 KB = 1,000 bytes), as used by storage manufacturers and networks. The <strong>binary</strong> units — KiB, MiB, GiB (1 KiB = 1,024 bytes) — are listed separately, because operating systems often label binary sizes with the decimal names.
Frequently asked questions
- How many byte are in 1 bit?
- 1 bit = 0.125 byte (B). To convert any number of bit to byte, multiply by 0.125.
- How do I convert bit to byte?
- Multiply the number of bit by 0.125. For example, 10 bit = 10 × 0.125 = 1.25 byte, and 25 bit = 3.125 byte.
- How many bit are in 1 byte?
- 1 byte = 8 bit. So to convert byte back to bit, multiply by 8.
- What is the formula to convert bit to byte?
- byte = bit × 0.125. The reverse formula is bit = byte × 8.
- How much is 100 bit in byte?
- 100 bit = 12.5 byte. (And 1000 bit = 125 byte.)
- Which is bigger, a bit or a byte?
- A byte is larger: 1 byte = 8 bit.
- Is this bit to byte converter accurate?
- Yes — every value is computed from the exact 0.125 B per bit factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert byte to bit too?
- Yes. The converter works both ways — enter a value in either field. 1 byte = 8 bit.