Date & Age Calculators

Calculate exact ages, gaps between dates, countdowns to future events and working days — every calculator handles leap years and varying month lengths correctly.

Age CalculatorKnow your exact age in years, months, weeks, days & hoursOpen Age Difference CalculatorFind the exact age gap between two people instantlyOpen Date CalculatorCalculate days, weeks & months between two datesOpen Countdown CalculatorSee exactly how many days are left until any dateOpen Time Duration CalculatorAdd, subtract or find the gap between two clock timesOpen Business Days CalculatorCount working days between two dates, weekends excludedOpen

Choosing the right date calculator

These calculators all work on the same underlying calendar math, but each is built for a different question. Use the Age Calculator to find how old you are today, and the Age Difference Calculator to compare two people's birth dates instead of one date against today.

The Date Calculator finds the duration between any two dates or adds/subtracts a period from a date — useful for planning ahead. If you already know the target date and just want a live countdown, the Countdown Calculator is the faster tool for birthdays, exams and deadlines.

For anything measured in hours and minutes rather than days, use the Time Duration Calculator. And when weekends need to be excluded — project timelines, delivery estimates, notice periods — the Business Days Calculator counts only working days between two dates.