Quick reference table
Common si prefixes conversions
| From | To |
|---|---|
| 1 k | 1 1 |
| 1 M | 1 k |
| 1 G | 1 M |
| 1 1 | 1 m |
| 1 m | 1 µ |
| 1 µ | 1 n |
| 1 c | 1 m |
How to convert si prefixes
Metric prefixes scale any unit by a power of ten. Converting between them only means moving the decimal point, which this tool does for you.
Every si prefixes unit is a fixed multiple of one base unit, the unit. To convert a value, multiply it by the size of the starting unit and divide by the size of the target unit. For example, to convert k to 1, multiply by 1. To go the other way, divide by 1.
The converter above does this for you and shows the exact formula under the result.
Worked examples
kilo to (base unit)
| kilo (k) | (base unit) (1) |
|---|---|
| 1 k | 1 1 |
| 2 k | 2 1 |
| 5 k | 5 1 |
| 10 k | 1 1 |
| 25 k | 25 1 |
| 50 k | 5 1 |
| 100 k | 1 1 |
| 1,000 k | 1 1 |
mega to kilo
| mega (M) | kilo (k) |
|---|---|
| 1 M | 1 k |
| 2 M | 2 k |
| 5 M | 5 k |
| 10 M | 1 k |
| 25 M | 25 k |
| 50 M | 5 k |
| 100 M | 1 k |
| 1,000 M | 1 k |
SI prefixes units explained
| Unit | Symbol | Equals |
|---|---|---|
| yotta | Y | 1 Y = 1 × 10²⁴ unit |
| zetta | Z | 1 Z = 1 × 10²¹ unit |
| exa | E | 1 E = 1 × 10¹⁸ unit |
| peta | P | 1 P = 1 × 10¹⁵ unit |
| tera | T | 1 T = 1 unit |
| giga | G | 1 G = 1 unit |
| mega | M | 1 M = 1 unit |
| kilo | k | 1 k = 1 unit |
| hecto | h | 1 h = 1 unit |
| deca | da | 1 da = 1 unit |
| (base unit) | 1 | 1 1 = 1 unit |
| deci | d | 1 d = 0.1 unit |
| centi | c | 1 c = 0.01 unit |
| milli | m | 1 m = 0.001 unit |
| micro | µ | 1 µ = 0.000001 unit |
| nano | n | 1 n = 1 × 10⁻⁹ unit |
| pico | p | 1 p = 1 × 10⁻¹² unit |
| femto | f | 1 f = 1 × 10⁻¹⁵ unit |
| atto | a | 1 a = 1 × 10⁻¹⁸ unit |
| zepto | z | 1 z = 1 × 10⁻²¹ unit |
| yocto | y | 1 y = 1 × 10⁻²⁴ unit |
Popular conversions: kilo mega giga converter, milli micro nano.
Frequently asked questions
How many milli are in a kilo?
A kilo is 10³ and a milli is 10⁻³, so one kilo is 1,000,000 (10⁶) milli.
How do I convert k to 1?
Multiply the value in k by 1 to get 1. For example, 10 k = 1 1.
How many 1 is 1 k?
1 k = 1 1, and 1 1 = 0.001 k.
Does this si prefixes converter work offline?
Yes. After the page has loaded once, all calculations run in your browser, so it keeps working without an internet connection.