I use the following dosage chart, which was reviewed by several Vets. I use the 120 mg/ml 6mg/kg concentration, which is in the 40 to 85 lb solution. Run these by your Veterinarian as well. I pour the liquid from single dose tubes into a tinted bottle for storage and apply the proper dosage using a 1 ml (cc) syringe (no needle, of course) as you normally would (i.e. part fur at base of neck and apply liquid).

REVOLUTION DOSES FOR CATS 120 MG/ML 6 MG/KG
0.5 LB / 8 OZ 0.01 ML
1 LB 0.02 ML
1.5 LB / 23 OZ 0.03 ML
2 LB 0.05 ML
3 LB 0.07 ML
4 LB 0.09 ML
5 LB 0.11 ML
6 LB 0.14 ML
7 LB 0.16 ML
8 LB 0.18 ML
9 LB 0.21 ML
10 LB 0.23 ML
11 LB 0.25 ML
12 LB 0.27 ML
13 LB 0.30 ML
14 LB 0.32 ML