binary provides a bug-free and easy way to convert between and within binary (IEC) and decimal (SI) units.

binary is distributed on PyPI as a universal wheel and is available on Linux/macOS and Windows and supports Python 2.7/3.5+ and PyPy.

$ pip install binary

Let's import what we need:

>>> from binary import BinaryUnits, DecimalUnits, convert_units

Basic conversion:

>>> convert_units(1536, BinaryUnits.KB, BinaryUnits.MB)
(1.5, 'MiB')

How much actual storage your new hard drive has:

>>> convert_units(4, DecimalUnits.TB, BinaryUnits.TB)
(3.637978807091713, 'TiB')

Human readable:

>>> amount, unit = convert_units(kubernetes_ingest_bytes_per_second)
>>> 'Incoming traffic: {:.2f} {}/s'.format(amount, unit)
'Incoming traffic: 24.77 GiB/s'

Just a single function!

convert_units(n, unit=BYTE, to=None, si=False, exact=False)

Converts between and within binary and decimal units. If no unit is specified, n is assumed to already be in bytes. If no to is specified, n will be converted to the highest unit possible. If no unit nor to is specified, the output will be binary units unless si is True. If exact is True. the calculations will use decimal.Decimal.

• Parameters
  • n (int or float) - The number of units.
  • unit - The unit n represents. See types.
  • to - The unit to convert to. See types.
  • si (bool) - Assume SI units when no unit nor to is specified.
  • exact (bool) - Use decimal.Decimal for calculations.

Although the string representations for binary units end in iB, the attributes do not for ease of use.

binary is distributed under the terms of both

• MIT License
• Apache License, Version 2.0

at your option.

Important changes are emphasized.

• Initial release