Age Charts

Please remember that these charts only represent an estimation.
There's no exact science here.

Dog

Small dogs are 20 lbs or less. Medium dogs are under 50 lbs. Large dogs are under 90 lbs, and giant breeds are over 90 lbs.

Human Age	Pet Size	Dog Years	Age Class
1	small	7	puppy
1	medium	7	puppy
1	large	8	puppy
1	giant	9	puppy
2	giant	13	puppy
2	large	14	puppy
2	medium	16	puppy
2	small	18	puppy
3	small	20	puppy
3	medium	21	adult
3	large	24	adult
3	giant	26	adult
4	small	26	adult
4	medium	27	adult
4	large	31	adult
4	giant	34	adult
5	small	33	adult
5	medium	34	adult
5	large	38	adult
5	giant	41	adult
6	small	40	adult
6	medium	42	adult
6	large	45	senior
6	giant	49	senior
7	small	44	adult
7	medium	47	adult
7	large	50	senior
7	giant	56	senior
8	small	48	adult
8	medium	51	adult
8	large	55	senior
8	giant	64	senior
9	small	52	senior
9	medium	56	senior
9	large	61	senior
9	giant	71	senior
10	small	56	senior
10	medium	60	senior
10	large	66	geriatric
10	giant	78	geriatric
11	small	60	senior
11	medium	65	senior
11	large	72	geriatric
11	giant	86	geriatric
12	small	64	senior
12	medium	69	geriatric
12	large	77	geriatric
12	giant	93	geriatric
13	small	68	senior
13	medium	71	geriatric
13	large	82	geriatric
13	giant	101	geriatric
14	small	72	geriatric
14	medium	78	geriatric
14	large	88	geriatric
14	giant	108	geriatric
15	small	76	geriatric
15	medium	83	geriatric
15	large	93	geriatric
15	giant	115	geriatric
16	small	80	geriatric
16	medium	87	geriatric
16	large	99	geriatric
16	giant	123	geriatric
17	small	84	geriatric
17	medium	92	geriatric
17	large	104	geriatric
17	giant	131	geriatric
18	small	88	geriatric
18	medium	96	geriatric
18	large	109	geriatric
18	giant	139	geriatric
19	small	92	geriatric
19	medium	101	geriatric
19	large	115	geriatric
20	small	96	geriatric
20	medium	105	geriatric
20	large	120	geriatric
21	small	100	geriatric
21	medium	109	geriatric
21	large	126	geriatric
22	small	104	geriatric
22	medium	113	geriatric
22	large	130	geriatric
23	small	108	geriatric
23	medium	119	geriatric
24	small	112	geriatric
24	medium	120	geriatric
25	small	116	geriatric
25	medium	124	geriatric

use the age calculator

Cat

This chart is for an average-sized cat up to 20 lbs.

Human Age	Cat Years	Age Class
1	7	kitten
2	14	kitten
3	20	kitten
4	15	adult
5	33	adult
6	40	adult
7	44	adult
8	48	adult
9	52	senior
10	56	senior
11	60	senior
12	64	senior
13	67	senior
14	72	geriatric
15	76	geriatric
16	80	geriatric
17	84	geriatric
18	88	geriatric
19	92	geriatric
20	96	geriatric
21	100	geriatric
22	104	geriatric
23	108	geriatric
24	112	geriatric
25	116	geriatric

use the age calculator