Tool library

Age and date calculators

Choose a focused calculator for exact age gaps, birthdays, generations, social rules and general date intervals.

Age Gap Calculator

Exact years, months and days between two people.

Find exact age on today or any date.

Explore the popular adult dating rule.

View the same social rule as a range.

Measure sibling spacing precisely.

Compare a parent and child birth-date gap.

Convert an exact age into useful time units.

Compare birthdays and calendar separation.

Calculate age on a past or future date.

Estimate a birth year from current age.

Find an approximate generation label.

Measure the interval between any two dates.

Find the next birthday date, weekday and countdown.

Compare ages using percentages and ratios.