How much dirt would I need (in yards ) to fill a hole 1ft deep by 10 ft long by 15ft wide

Hi, Dave,
Approximately 5 /12 cubic yards.
The hole would be 1 ft x 10 ft x 15 ft, = 150 cubic feet.
There are 27 cubic feet in 1 cubic yard.
So, 150 divided by 27 = 5.55 cubic yards.
That's about 3 pickup truck loads, depending on how much you put in the pickup, and what type it is.
Best wishes.