What is a second?
Definition
s
The second (s) is the base SI unit of time.
Unit system
Common
Convert seconds
All time units
| Unit | Symbol | System |
|---|---|---|
| nanoseconds | ns | Scientific |
| microseconds | μs | Scientific |
| milliseconds | ms | Common |
| seconds | s | Common |
| minutes | min | Common |
| hours | hr | Common |
| days | day | Common |
| weeks | wk | Common |
| months | mo | Common |
| years | yr | Common |