SI Prefixes Converter
Convert between SI prefix multipliers: kilo, mega, giga, tera, milli, micro, etc.
1 Unit = 0.001 Kilo (k)
About the si prefixes converter
SI prefixes are the standard multipliers attached to a unit to scale it by a power of ten — kilo (×10³), mega (×10⁶), milli (×10⁻³), and so on. They let you express enormous and tiny quantities compactly: 1 GHz instead of 1,000,000,000 Hz, or 1 μm instead of 0.000001 m. This converter lets you translate any plain number between any two prefixes, useful when reading scientific notation, datasheets, or scaling between units.
Frequently asked questions
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What is the full list of SI prefixes?
From largest to smallest: yotta (10²⁴), zetta (10²¹), exa (10¹⁸), peta (10¹⁵), tera (10¹²), giga (10⁹), mega (10⁶), kilo (10³), hecto (10²), deka (10¹), unit, deci (10⁻¹), centi (10⁻²), milli (10⁻³), micro (10⁻⁶), nano (10⁻⁹), pico (10⁻¹²), femto (10⁻¹⁵), atto (10⁻¹⁸), zepto (10⁻²¹), yocto (10⁻²⁴).
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Are SI prefixes the same as binary prefixes for memory?
No. “Kilobyte” in storage often means 1,024 bytes (binary, properly written KiB), while “kilo” in SI means exactly 1,000. The IEC introduced kibi/mebi/gibi (KiB/MiB/GiB) to disambiguate.
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Complete list of si prefixes units
- Unit