Calculators by Category

Browse every DaysCalcNow tool by topic — age, dates and days, working days, countdowns, retirement, anniversaries, the calendar, financial years, and deadlines. Each category collects the related calculators in one place, with a short guide to which one to reach for.

Age Calculators (14) Every age calculator in one place: your exact age from a date of birth, age difference between two people, age in days, weeks, or months, and more. View calculators Date & Days Calculators (16) Count the days between two dates, add or subtract days from a date, and find what date falls a set number of days from today — all in one place. View calculators Working Days Calculators (10) Count working days between two dates, add business days to a date, and skip weekends and public holidays — including India-specific working-day tools. View calculators Countdown Calculators (13) Count down to any date, your next birthday, or a holiday like Christmas or Diwali. Live countdowns that recalculate from today every time you visit. View calculators Retirement Calculators (15) Work out your retirement date, count the years and days until you retire, and check retirement or pension age for India, the UK, US, Canada, and Australia. View calculators Anniversary Calculators (16) Work out how long you've been married, together, or employed, and count down to your next anniversary — wedding, dating, work, friendship, and more. View calculators Calendar Calculators (9) Find the day of the week for any date, check whether a year is a leap year, look up ISO week numbers, and browse full-year calendars. View calculators Financial Year Calculators (5) Find which financial or tax year a date falls in for India, the UK, the US, and Australia, plus the quarter, start and end dates, and days remaining. View calculators Deadline & Milestone Calculators (7) Work out due dates and deadlines, notice-period end dates, academic semester progress, and life-day milestones like your 10,000th day. View calculators