Last Updated：2025/11/21
(informal) A period of time in the life of dogs, defined such that the average life expectancy of a dog in dog years
is numerically equivalent to the average life expectancy of a human. A 4- and a 5-year-old dog are about as mature as a human of 28 to 30 years and 33 to 35 years, respectively. The most common calcuation uses a ratio of seven dog years to one human year.
音声機能が動作しない場合はこちらをご確認ください
See correct answer
dog year
Edit Histories（0）
Source Word
dog year
Noun
informal
(informal)
A
period
of
time
in
the
life
of
dogs,
defined
such
that
the
average
life
expectancy
of
a
dog
in
"dog
years"
is
numerically
equivalent
to
the
average
life
expectancy
of
a
human.
A
4-
and
a
5-year-old
dog
are
about
as
mature
as
a
human
of
28
to
30
years
and
33
to
35
years,
respectively.
The
most
common
calcuation
uses
a
ratio
of
seven
dog
years
to
one
human
year.
Japanese Meaning
（非公式）犬の年齢を人間の年齢に換算する指標。一般的に、1人間年を7犬年として計算され、犬の成熟度や寿命を人間のそれと比較するために用いられる。
Sense（1）
(informal)
A
period
of
time
in
the
life
of
dogs,
defined
such
that
the
average
life
expectancy
of
a
dog
in
"dog
years"
is
numerically
equivalent
to
the
average
life
expectancy
of
a
human.
A
4-
and
a
5-year-old
dog
are
about
as
mature
as
a
human
of
28
to
30
years
and
33
to
35
years,
respectively.
The
most
common
calcuation
uses
a
ratio
of
seven
dog
years
to
one
human
year.
（ plural ）
