Spot-on treatment for the cats

Got the 3 cats on Revolution anti-mite treatment
a few days back,
and halfway I was worrying
whether Momo would be able to use it
(The Revolution Anti-mite Spot-on treatment
have a few types meant for cats of different weight ranges)

When I saw the weight range printed on the product,
"5.1lb to 15lb",
I thought "Hmm good, cover such a large range Momo sure can use"

After putting the spot on for them,
I went to use my handphone converter function to
convert 15 lb to kg.
It returned 6.8 kg.

We then proceeded to weigh Momo.
7.2kg

Oh. so actually he's still out of the range.
But only by a bit so I guess it should be okay? : S