Metric (SI) Prefix Converter
Convert SI prefixes units instantly: base unit, quetta (10³⁰), ronna (10²⁷), yotta (10²⁴), zetta (10²¹), exa (10¹⁸) and more. Precise factors, all units shown at once.
| Unit | Value |
|---|---|
| base unit (—) | |
| quetta (10³⁰) (Q) | |
| ronna (10²⁷) (R) | |
| yotta (10²⁴) (Y) | |
| zetta (10²¹) (Z) | |
| exa (10¹⁸) (E) | |
| peta (10¹⁵) (P) | |
| tera (10¹²) (T) | |
| giga (10⁹) (G) | |
| mega (10⁶) (M) | |
| kilo (10³) (k) | |
| hecto (10²) (h) | |
| deca (10¹) (da) | |
| deci (10⁻¹) (d) | |
| centi (10⁻²) (c) | |
| milli (10⁻³) (m) | |
| micro (10⁻⁶) (µ) | |
| nano (10⁻⁹) (n) | |
| pico (10⁻¹²) (p) | |
| femto (10⁻¹⁵) (f) | |
| atto (10⁻¹⁸) (a) | |
| zepto (10⁻²¹) (z) | |
| yocto (10⁻²⁴) (y) | |
| ronto (10⁻²⁷) (r) | |
| quecto (10⁻³⁰) (q) |
Tip: double-click a row to convert from that unit. Click a value to copy it. Expressions like 3*12 are accepted.
How to use the Metric
- Type the value you want to convert (expressions are allowed).
- Choose the unit you are converting from.
- Read the result in every other unit in the table — it updates as you type.
About this tool
Enter a value and choose its unit; the SI prefixes is converted to all 25 supported units simultaneously. Conversions use exact definitions where they exist (e.g. 1 inch = 25.4 mm, 1 lb = 0.453 592 37 kg).
Common conversions
| 1 — = 1 × 10⁻³⁰ Q | 1 Q = 1 × 10³⁰ — |
| 1 — = 1 × 10⁻²⁷ R | 1 R = 1 × 10²⁷ — |
| 1 — = 1 × 10⁻²⁴ Y | 1 Y = 1 × 10²⁴ — |
| 1 — = 1 × 10⁻²¹ Z | 1 Z = 1 × 10²¹ — |
| 1 — = 1 × 10⁻¹⁸ E | 1 E = 1 × 10¹⁸ — |
| 1 — = 1 × 10⁻¹⁵ P | 1 P = 1 × 10¹⁵ — |