Dog Years Chart: Ages 1 to 20 in Human Years

Pick an age to open its own page, or use the dog age calculator for a result in years and months.

Dog age	Small (up to 20 lb)	Medium (21 to 50 lb)	Large (over 50 lb)	DNA formula
1 year	15	15	15	31
2 years	24	24	24	42
3 years	28	28	28	49
4 years	32	32	32	53
5 years	36	36	36	57
6 years	40	42	45	60
7 years	44	47	50	62
8 years	48	51	55	64
9 years	52	56	61	66
10 years	56	60	66	68
11 years	60	65	72	69
12 years	64	69	77	71
13 years	68	74	82	72
14 years	72	78	88	73
15 years	76	83	93	74
16 years	80	87	99	75
17 years	84	92	104	76
18 years	88	96	109	77
19 years	92	101	115	78
20 years	96	105	120	79

Dog born on a known date?The calculator works from a birthday and shows the life stage too.