ConvertUnitOnline

Prefixes Converter

Convert kilo, mega, giga, milli, micro, and the full SI prefix set — instantly.

Free SI prefix converter. Scale any unit by powers of ten — kilo to mega, milli to micro, and the complete current SI set including 2022 CGPM quetta, ronna, ronto, and quecto. Use the express converter for any unit pair, or open a quick conversion below.

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1 kilo = 0.001 megas

From

To

Format

Popular conversions

Hand-picked pairs with dedicated converter pages — open one to convert instantly.

Kilo → Mega

Kilo to Mega

Mega → Kilo

Mega to Kilo

Mega → Giga

Mega to Giga

Giga → Mega

Giga to Mega

Milli → Micro

Milli to Micro

Micro → Milli

Micro to Milli

Micro → Nano

Micro to Nano

Nano → Micro

Nano to Micro

Browse all SI prefix units

Pick any prefix to open a two-way conversion. SI prefixes scale a unit by powers of ten — they are not standalone physical quantities. Includes 2022 CGPM additions quetta, ronna, ronto, and quecto.

From

To

QUETTA

1 Q = 1e+30 —

quetta (Q) → none (unit) (—) none (unit) (—) → quetta (Q)

RONNA

1 R = 1e+27 —

ronna (R) → none (unit) (—) none (unit) (—) → ronna (R)

YOTTA

1 Y = 1e+24 —

yotta (Y) → none (unit) (—) none (unit) (—) → yotta (Y)

ZETTA

1 Z = 1e+21 —

zetta (Z) → none (unit) (—) none (unit) (—) → zetta (Z)

EXA

1 E = 1,000,000,000,000,000,000 —

exa (E) → none (unit) (—) none (unit) (—) → exa (E)

PETA

1 P = 1,000,000,000,000,000 —

peta (P) → none (unit) (—) none (unit) (—) → peta (P)

TERA

1 T = 1,000,000,000,000 —

tera (T) → none (unit) (—) none (unit) (—) → tera (T)

GIGA

1 G = 1,000 M

giga (G) → mega (M) mega (M) → giga (G)

MEGA

1 M = 1,000 k

mega (M) → kilo (k) kilo (k) → mega (M)

KILO

1 k = 0.001 M

kilo (k) → mega (M) mega (M) → kilo (k)

HECTO

1 h = 100 —

hecto (h) → none (unit) (—) none (unit) (—) → hecto (h)

DECA

1 da = 10 —

deca (da) → none (unit) (—) none (unit) (—) → deca (da)

NONE (UNIT)

1 — = 1 —

none (unit) (—) → none (unit) (—) none (unit) (—) → none (unit) (—)

DECI

1 d = 0.1 —

deci (d) → none (unit) (—) none (unit) (—) → deci (d)

CENTI

1 c = 0.01 —

centi (c) → none (unit) (—) none (unit) (—) → centi (c)

MILLI

1 m = 1,000 µ

milli (m) → micro (µ) micro (µ) → milli (m)

MICRO

1 µ = 0.001 m

micro (µ) → milli (m) milli (m) → micro (µ)

NANO

1 n = 0.001 µ

nano (n) → micro (µ) micro (µ) → nano (n)

PICO

1 p = 0.000000000001 —

pico (p) → none (unit) (—) none (unit) (—) → pico (p)

FEMTO

1 f = 0.000000000000001 —

femto (f) → none (unit) (—) none (unit) (—) → femto (f)

ATTO

1 a = 0.000000000000000001 —

atto (a) → none (unit) (—) none (unit) (—) → atto (a)

ZEPTO

1 z = 0 —

zepto (z) → none (unit) (—) none (unit) (—) → zepto (z)

YOCTO

1 y = 1e-24 —

yocto (y) → none (unit) (—) none (unit) (—) → yocto (y)

RONTO

1 r = 1e-27 —

ronto (r) → none (unit) (—) none (unit) (—) → ronto (r)

QUECTO

1 q = 1e-30 —

quecto (q) → none (unit) (—) none (unit) (—) → quecto (q)