Since 1 New Zealand Dollar is equal to 0.6204998250190493 United States Dollars, we could say that n New Zealand Dollars are equal to 0.6204998250190493 times n United States Dollars. In other words, we could use the following formula:
United States Dollars = New Zealand Dollars x 0.6204998250190493
For example, let's say that we want to convert 2.0 New Zealand Dollars to United States Dollars. Then, we just replace New Zealand Dollars in the abovementioned formula with 2.0:
United States Dollars = 2.0 x 0.6204998250190493
That is, 2.0 New Zealand Dollars are equal to 1.2409996500380986 United States Dollars.