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Convert bits to bytes

1 bit = 0.125 bytes

bytes = bits × 0.125

One bit is 0.125 bytes, so multiply by 0.125 to convert. That factor is exact by definition. A byte is 8 bits. Network speeds are quoted in bits per second and file sizes in bytes, so a 100 Mbps line moves at most 12.5 MB per second.

Convert any value

Try an example
Gigabytes (GB, 10⁹)
0 GB
Bytes
0.125 B
Bits
1 bit
Kilobytes (KB, 10³)
0.000125 KB
Megabytes (MB, 10⁶)
0 MB
Terabytes (TB, 10¹²)
0 TB
Kibibytes (KiB, 2¹⁰)
0.000122 KiB
Mebibytes (MiB, 2²⁰)
0 MiB
Gibibytes (GiB, 2³⁰)
0 GiB
Tebibytes (TiB, 2⁴⁰)
0 TiB
Time to transfer at 100 Mbit/s
0 seconds
Assumptions
  • KB/MB/GB/TB are decimal (powers of 1,000); KiB/MiB/GiB/TiB are binary (powers of 1,024).
  • A byte is 8 bits.
Decimal (SI) vs binary (IEC) prefixes
DecimalBytesBinaryBytesDifference
1 KB (kilobyte)1,0001 KiB (kibibyte)1,0242.4%
1 MB (megabyte)1,000,0001 MiB (mebibyte)1,048,5764.9%
1 GB (gigabyte)10⁹1 GiB (gibibyte)1,073,741,8247.4%
1 TB (terabyte)10¹²1 TiB (tebibyte)1,099,511,627,77610.0%
1 PB (petabyte)10¹⁵1 PiB (pebibyte)2⁵⁰12.6%
What advertised drive sizes show in Windows (binary GiB, labelled 'GB')
AdvertisedBytesShown as
128 GB128,000,000,000119.2 GB
256 GB256,000,000,000238.4 GB
512 GB512,000,000,000476.8 GB
1 TB1,000,000,000,000931.3 GB
2 TB2,000,000,000,0001,862.6 GB
4 TB4,000,000,000,0003,725.3 GB
Typical file sizes
Approx. size
Plain-text email5 KB
Smartphone photo (JPEG)3–5 MB
MP3 song (4 min, 256 kbps)8 MB
RAW photo25–50 MB
1 hour of HD streaming video3 GB
1 hour of 4K streaming video7 GB
Blu-ray movie25–50 GB
Modern AAA video game100–150 GB

bits to bytes table

bitsbytes
1 bit0.125 bytes
2 bits0.25 bytes
3 bits0.375 bytes
4 bits0.5 bytes
5 bits0.625 bytes
10 bits1.25 bytes
15 bits1.875 bytes
20 bits2.5 bytes
25 bits3.125 bytes
50 bits6.25 bytes
75 bits9.375 bytes
100 bits12.5 bytes
500 bits62.5 bytes
1,000 bits125 bytes

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1 bit = 0.125 bytes. Source: https://www.calculateitnow.dev/bits-to-bytes