SI Number Prefixes

Yotta (Y) = 1,000,000,000,000,000,000,000,000

Zetta(Z) = 1,000,000,000,000,000,000,000

Exa(E) = 1,000,000,000,000,000,000

Peta(P) = 1,000,000,000,000,000

Tera(T) = 1,000,000,000,000

Giga(G) = 1,000,000,000

Mega(M) = 1,000,000

Kilo(k) = 1,000

Hecto(h) = 100

Deca(da) = 10

Unit = 1

Deci(d) = 0.1

Centi(c) = 0.01

Milli(m) = 0.001

Micro(μ) = 0.000 001

Nano(n) = 0.000 000 001

Pico(p) = 0.000 000 000 001

Femto(f) = 0.000 000 000 000 001

Atto(a) = 0.000 000 000 000 000 001

Zepto(z) = 0.000 000 000 000 000 000 001

Yocto(y) = 0.000 000 000 000 000 000 000 001

https://en.wikipedia.org/wiki/Category:SI_prefixes