How to convert Amps to Watts

I(A) = P(W) / V(V)

I(A) = 17(W) / 7.5(V)

2.2666(A) for PowerBook 150 AC Adapter

2.533A = 19W @ 7.5V for the higher Wattage 100 Series PowerBooks

Even the one listed for 17 watt and 19 watt say 7.5V X 2.0A.

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I didn't see that anywhere in the table. I haven't got the 19W or 24W adapters to check the specs, do you have them?

ISTR someone mentioning that the specs of some of Apple's AC adapters don't jibe with Ohm's Law . . . dunno, need input. mcd, you must have them all, what are the Amperage specs on the other model numbers?