Date math without the mess

Simple calculators for birthdays, generations, and life timelines.

Use precise browser-based tools to calculate your age, age on a past date, generation label, or percentage of an 80-year life already lived.

Today's ledger

Calculators

Choose a date tool

Calculate your exact age in years, months, and days — instantly and privately. No data stored, runs entirely in your browser. Try it now.

Find out how old someone was on any past date. Perfect for anniversary lookups, historical research, and milestone tracking.

What generation are you? Enter any birth year to see your generation label (Greatest Gen through Gen Beta), year range, and description.

What percentage of an 80-year life have you already lived? Get your life percentage, remaining years, and a simple visual. Private and instant.

Find your Western zodiac sign, Chinese zodiac animal, and modern birthstone from your birth date.

Quick lookup

Browse age ranges, generations, and birthday milestones for any birth year from 1930 to 2025.