# pico (p)

Pico (p) is the prefix for a trillionth. In decimal notation it is a zero

with 12 digits after the decimal point: 0.000.000.000.001, in exponential notation it is: 10exp-12 or 10hoch-12. The prefix pico is defined like all other mathematical prefixes in the SystÃ¨me International (SI) and is used for the indication of the size of capacities, but also for time-related indications.