# Duration

Usage impacts are measured for a specific time duration given by the user. The API handles three different time units :

time unit
HOURS
DAYS
YEARS

When duration is not given, the impact is measured for the default duration. Typically, 1 hour. Note: units are cumulative, if multiple units are used, they are summed up.

## Example

HOURS = 1
DAYS = 1
YEARS =  1


will be converted in 8785 hours (1+1*24+1*24*365).