SI Prefixes
SI (metric) prefix reference and unit converter. Kilo, mega, giga, and binary IEC prefixes.
Quick Converter
Quetta (Q)1.0000e-21
Ronna (R)1.0000e-18
Yotta (Y)1.0000e-15
Zetta (Z)1.0000e-12
Exa (E)1.0000e-9
Peta (P)0.000001
Tera (T)0.001
Mega (M)1000
Kilo (k)1.0000e+6
Hecto (h)1.0000e+7
Deka (da)1.0000e+8
Deci (d)1.0000e+10
Centi (c)1.0000e+11
Milli (m)1.0000e+12
Micro (μ)1.0000e+15
Nano (n)1.0000e+18
Pico (p)1.0000e+21
Femto (f)1.0000e+24
Atto (a)1.0000e+27
Zepto (z)1.0000e+30
Yocto (y)1.0000e+33
| Symbol | Name | Factor | Power |
|---|---|---|---|
| Q | Quetta | 1e+30 | 10^30 |
| R | Ronna | 1e+27 | 10^27 |
| Y | Yotta | 1e+24 | 10^24 |
| Z | Zetta | 1e+21 | 10^21 |
| E | Exa | 1e+18 | 10^18 |
| P | Peta | 1e+15 | 10^15 |
| T | Tera | 1e+12 | 10^12 |
| G | Giga | 1e+9 | 10^9 |
| M | Mega | 1e+6 | 10^6 |
| k | Kilo | 1,000 | 10^3 |
| h | Hecto | 100 | 10^2 |
| da | Deka | 10 | 10^1 |
| — | (base) | 1 | 1 |
| d | Deci | 1e-1 | 10^-1 |
| c | Centi | 1e-2 | 10^-2 |
| m | Milli | 1e-3 | 10^-3 |
| μ | Micro | 1e-6 | 10^-6 |
| n | Nano | 1e-9 | 10^-9 |
| p | Pico | 1e-12 | 10^-12 |
| f | Femto | 1e-15 | 10^-15 |
| a | Atto | 1e-18 | 10^-18 |
| z | Zepto | 1e-21 | 10^-21 |
| y | Yocto | 1e-24 | 10^-24 |