SI stands for 'International System of Units' Metric or SI units allows conversion from one set of units to another. It is based on the units of ten. All units of a particular measurement in Metric conversion are derived from the corresponding base unit by adding up some metric prefix.
yotta(Y), zetta(Z), exa(E), peta(P), tera(T), giga(G), mega(M), kilo(k), hecto(h), deka(da), deci(d), centi(c), milli(m), micro(µ), nano(n), pico(p), femto(f), atto(a), zepto(z), yacto(y) .
| Prefix | Symbol | Factor |
|---|---|---|
| yotta | Y | 1024 = 1,000,000,000,000,000,000,000,000 |
| zetta | Z | 1021 = 1,000,000,000,000,000,000,000 |
| exa | E | 1018 = 1,000,000,000,000,000,000 |
| peta | P | 1015 = 1,000,000,000,000,000 |
| tera | T | 1012 = 1,000,000,000,000 |
| giga | G | 109 = 1,000,000,000 |
| mega | M | 106 = 1,000,000 |
| kilo | k | 103 = 1,000 |
| hecto | h | 102 = 100 |
| deka | da | 101 = 10 |
| deci | d | 10-1 = 0.1 |
| centi | c | 10-2 = 0.01 |
| milli | m | 10-3 = 0.001 |
| micro | µ | 10-6 = 0.000001 |
| nano | n | 10-9 = 0.000000001 |
| pico | p | 10-12 = 0.000000000001 |
| femto | f | 10-15 = 0.000000000000001 |
| atto | a | 10-18 = 0.000000000000000001 |
| zepto | z | 10-21 = 0.000000000000000000001 |
| yocto | y | 10-24 = 0.000000000000000000000001 |
The distance from City A to City B is 8.0 x 103 meters. From the above table, 103 can be replaced with the prefix 'kilo'. Now the distance could be stated as 8.0 kilometers or 8.0 km.
Learn SI Prefixes Unit Conversion in this tutorial, given with the definition and example.
