Pet Age Comparison Chart

Compare your pet's age in human years. Accurate age conversion for dogs (by size) and cats.

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Pet Type

Pet Age (years)

Your dog at 5 years is equivalent to

human years

Life Stage: Adult

Age Comparison Chart (Human Years)

Pet Year	Small Dog	Med Dog	Large Dog	Cat
1	15	15	15	15
2	25	24	24	24
3	29	29	32	28
4	33	34	39	32
5	37	39	46	36
6	41	44	52	40
7	45	49	58	44
8	49	54	64	48
9	53	59	70	52
10	57	64	76	56
11	61	69	82	60
12	65	74	88	64
13	69	79	94	68
14	73	84	100	72
15	77	89	106	76
16	81	94	112	80
17	85	99	118	84
18	89	104	124	88
19	93	109	130	92
20	97	114	136	96

Features

Dog age by size (small, medium, large)
Cat age conversion
Life stage indicator
Complete 20-year comparison chart

Disclaimer: This tool is provided “as is” for informational and educational purposes only. Results may not be 100% accurate. ToolBird makes no warranties, express or implied, regarding the accuracy, reliability, or completeness of any output generated by this tool. This tool does not constitute professional, legal, financial, medical, or tax advice. Always consult a qualified professional for important decisions. By using this tool, you agree that ToolBird and its operators shall not be held liable for any damages, losses, or consequences arising from the use of this tool or reliance on its results. All processing occurs in your browser — we do not store, transmit, or access your data. Use at your own risk.

Pet Year	Small Dog	Med Dog	Large Dog	Cat
1	15	15	15	15
2	25	24	24	24
3	29	29	32	28
4	33	34	39	32
5	37	39	46	36
6	41	44	52	40
7	45	49	58	44
8	49	54	64	48
9	53	59	70	52
10	57	64	76	56
11	61	69	82	60
12	65	74	88	64
13	69	79	94	68
14	73	84	100	72
15	77	89	106	76
16	81	94	112	80
17	85	99	118	84
18	89	104	124	88
19	93	109	130	92
20	97	114	136	96

Pet Year	Small Dog	Med Dog	Large Dog	Cat
1	15	15	15	15
2	25	24	24	24
3	29	29	32	28
4	33	34	39	32
5	37	39	46	36
6	41	44	52	40
7	45	49	58	44
8	49	54	64	48
9	53	59	70	52
10	57	64	76	56
11	61	69	82	60
12	65	74	88	64
13	69	79	94	68
14	73	84	100	72
15	77	89	106	76
16	81	94	112	80
17	85	99	118	84
18	89	104	124	88
19	93	109	130	92
20	97	114	136	96

Pet Year	Small Dog	Med Dog	Large Dog	Cat
1	15	15	15	15
2	25	24	24	24
3	29	29	32	28
4	33	34	39	32
5	37	39	46	36
6	41	44	52	40
7	45	49	58	44
8	49	54	64	48
9	53	59	70	52
10	57	64	76	56
11	61	69	82	60
12	65	74	88	64
13	69	79	94	68
14	73	84	100	72
15	77	89	106	76
16	81	94	112	80
17	85	99	118	84
18	89	104	124	88
19	93	109	130	92
20	97	114	136	96