What annualising income means
Annualising income means translating one repeating pay amount into an estimated full-year gross income. If you know the hourly rate, daily rate, weekly pay, or monthly pay, the calculator turns that into an annual figure first and then expresses the same estimate in the other common pay periods.
That makes the tool useful when different employers, landlords, lenders, or clients ask for income in different formats. One role may be discussed hourly, another monthly, and another as a yearly salary. Putting them into the same annual frame helps you compare them honestly.