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Pico (p)

The SI prefix pico (p): a factor of 10⁻¹², which is one trillionth (10⁻¹²).

What is a pico unit?

Symbol
p
Quantity
SI Prefixes
Unit system
SI
Definition
The SI prefix pico (p): a factor of 10⁻¹², which is one trillionth (10⁻¹²).
Exact
Yes, the value is exact by definition
Source
SI Brochure, 9th edition (BIPM, 2019)

Common applications

Used for picofarads of capacitance, picoseconds in fast electronics and picometers for atomic distances (an atom is a few hundred picometers across).

Pico in other si prefixes units

Pico quick reference

Pico in other units
PicoNanoKiloMilli
1 p= 0.001 n= 1e-15 k= 1e-9 m
10 p= 0.01 n= 1e-14 k= 1e-8 m
100 p= 0.1 n= 1e-13 k= 1e-7 m
1000 p= 1 n= 1e-12 k= 0.000001 m

Where the pico unit fits

The next smaller si prefixes unit is the femto unit (f). 1 p = 1000 f, and 1 f = 0.001 p.

The next larger si prefixes unit is the nano unit (n). 1 p = 0.001 n, and 1 n = 1000 p.

Frequently asked questions

How many nano units are in one pico unit?
One pico unit = 0.001 n (nano units).
How many kilo units are in one pico unit?
One pico unit = 1e-15 k (kilo units).
How many milli units are in one pico unit?
One pico unit = 1e-9 m (milli units).