What is century (100 yr)?

A century is a unit of time equal to 100 years. It is used in historical analysis, long-term demographic and climate projections, and describing spans of civilizational or geological time.

What is nanosecond?

A nanosecond is a unit of time equal to one billionth of a second. It is critical in computer processor timing, high-frequency trading, optical communications, and physics experiments.

Worked examples

1 century (100 yr) = 3.153600e+18 nanosecond

1 nanosecond = 1.000000e-09 second