How Old Is Someone Born in 1980 to 2015? Age Chart for 2026

How do you work out someone's age from their birth year?#

You only need two things: the year they were born and whether their birthday has happened yet this year. Everyone born in the same year is one of two ages at any moment in 2026: the older age if their birthday has passed, the younger age if it has not.

You can check this example yourself: see the exact age for a 15 May 1990 birth date opens the calculator already filled in.

Age chart for 2026: birth years 1980 to 2015#

Find the birth year in the first column. The second column is the age once the birthday has passed in 2026, and the third is the age before it.

Reading the chart: someone born in 1980 is 46 or 45, someone born in 2000 is 26 or 25, and someone born in 2015 is 11 or 10.

When do people born in each year turn 18, 21, 30, 40, 50 and 65?#

A birth year also tells you the calendar year of each milestone: add the milestone age to the birth year. The table shows every fifth birth year.

For example, someone born in 2000 turns 21 in 2021 and 30 in 2030, so in 2026 they are 26 after their birthday. Rules that depend on an exact birthday, such as school or eligibility cut-offs, need the full date, not just the year.

Why a birth year only gives an age within one year#

Two people born in the same year can be almost a year apart in age. Someone born on 1 January 2000 and someone born on 31 December 2000 are 26 and 25 on 1 January 2026: the first has just had a birthday and the second has not. They are only 365 days apart, and only the date of birth settles it.

For anything that needs to be exact, such as a form, a visa, an insurance quote or a school cut-off, use the full date of birth. The exact age tool gives the age in years, months and days on today's date or any date you choose, and the guide How to calculate your exact age on any date explains how the months and days are counted.

Common mistakes#

• Mistake: Subtracting the birth year from 2026 and stopping there.

  Instead: That is the age after the birthday. Before the birthday the person is one year younger: someone born in 2000 is 25 until their birthday in 2026.

• Mistake: Using this chart in a different year.

  Instead: The ages are for 2026. In 2027 every age in the chart is one higher.

• Mistake: Treating a birth year as a date of birth.

  Instead: Everyone born in a year is one of two ages at a given moment, so use the full date when it matters.