How old is a 2-year-old Old English Sheepdog in human years?

On the AAHA chart, a 2-year-old Old English Sheepdog is 24 human years in the 51–90 lb or over 90 lb weight class.

How old is a 10-year-old Old English Sheepdog in human years?

On the AAHA chart, a 10-year-old Old English Sheepdog is 66–78 human years in the 51–90 lb or over 90 lb weight class.

Which AAHA weight class is used for a Old English Sheepdog?

The verified weight 60–100 lb is charted as 51–90 lb or over 90 lb.

What size class does the age calculator use for a Old English Sheepdog?

The calculator is prefilled as large from the verified adult weight 60–100 lb.

Age calculator

Old English Sheepdog age in human years

Old English Sheepdog adults are charted from the verified weight 60–100 lb.

Last reviewed November 1, 2026.

Old English Sheepdog dog — Photo: Andrea Arden · CC BY 2.0 · Wikimedia Commons

Your inputs

Results update live as you type.

Weight unit

Dog weight (lb)

Typical adult weight: 60–100 lb.

Dog age (years)

Size category

Prefilled as large from this breed's adult weight.

Your results

Live — updates as you change inputs.

Dog age conversion

53 years

Human-equivalent age

Size category

large

Life stage

Adult

Uses the logarithmic formula from canine DNA methylation research (16 × ln(age) + 31 for age ≥ 1).

Senior thresholds vary by size — large breeds age faster.

Lifespan10–12 years

Weight60–100 lb

SizeLarge GroupHerding Group

On the AAHA canine age chart that weight falls in 51–90 lb or over 90 lb. The calculator on this page is the PawCalculator dog age calculator: 16 × ln(age) + 31, with the senior threshold set from the large size class. The table is the AAHA chart, which changes with weight class, so the two numbers answer different questions.

Reading the numbers

At 10 years the chart reads 66–78 human years. That is 16 human years older than the up-to-20-lb line on the same chart (56).

The listed lifespan is 10–12 years, so a 10-year-old is still inside the published range.

AAHA age chart

Human years below are copied from the verified breed_human_age rows for this breed, not from the calculator formula.

Old English Sheepdog age in human years by the AAHA weight class

Swipe sideways to read every column.

Dog age	Weight class	Human years
1	51–90 lb or over 90 lb	15
2	51–90 lb or over 90 lb	24
3	51–90 lb or over 90 lb	30–32
4Current age	51–90 lb or over 90 lb	35–37
5	51–90 lb or over 90 lb	40–42
6	51–90 lb or over 90 lb	45–49
7	51–90 lb or over 90 lb	50–56
8	51–90 lb or over 90 lb	55–64
9	51–90 lb or over 90 lb	61–71
10	51–90 lb or over 90 lb	66–78
11	51–90 lb or over 90 lb	72–86
12	51–90 lb or over 90 lb	77–93