A REFERENCE FOR EVERY CHAPTER

Dog years to human years chart.

Same birthday, different pace. Compare all four adult sizes with the same transparent model used in our calculator.

Download CSV ↓Calculate an age estimate →

Small ≤20 lb / ≤9.1 kgMedium >20–50 lb / >9.1–22.7 kgLarge >50–100 lb / >22.7–45.4 kgGiant >100 lb / >45.4 kg

Adult weight categories use pounds; kilograms are rounded. Exactly 100 lb uses Large; weights above 100 lb use Giant. Source: AKC published chart. Click an estimate to open it in the calculator.

Approximate human-equivalent years by adult size
Dog age	Small	Medium	Large	Giant
1 year	15	15	15	12
2 years	24	24	24	22
3 years	28	28	28	31
4 years	32	32	32	38
5 years	36	36	36	45
6 years	40	42	45	49
7 years	44	47	50	56
8 years	48	51	55	64
9 years	52	56	61	71
10 years	56	60	66	79
11 years	60	65	72	86
12 years	64	69	77	93
13 years	68	74	82	100
14 years	72	78	88	107
15 years	76	83	93	114
16 years	80	87	99	121

How to read the chart

Find your dog’s calendar age on the left, then choose the column for their fully grown size. For example, a five-year-old small dog maps to 36 human years; a five-year-old giant dog maps to 45.

Between birthdays, use our dog age calculator for months or a date of birth. Choose expected adult size for a puppy.

Why the numbers differ

These are the published AKC chart values. Small, Medium and Large begin at 15; Giant begins at 12. The differences between adjacent birthdays vary with age and size.

No estimates are supplied below one or above sixteen. The table is not a lifespan prediction. Read the method and references →

Dog years to human years chart.

How to read the chart

Why the numbers differ

Puppy age calculator

Dog age chart

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