4 subcategories · 7 calculators
Dates & Time
Free date, age, business-day, and time calculators for planning and schedules.
Subcategories
Browse dates & time.
Choose a subcategory to narrow the dates & time calculators in this branch.
Age & Birthdays
Age and birthday countdown calculators.
2 calculators
Browse age & birthdaysDate Calculations
Date difference, add/subtract, and days-until calculators.
3 calculators
Browse date calculationsBusiness Calendars
Business-day and weekday counting calculators.
1 calculators
Browse business calendarsTime Calculations
Clock-time addition, subtraction, and elapsed-time calculators.
1 calculators
Browse time calculationsPopular tools
Start with a calculator from this branch.
These calculators sit inside the subcategories shown above.
Dates & Time / Age & Birthdays
Age Calculator
Calculate exact age in years, months, and days, then see total elapsed time and the countdown to the next birthday.
Dates & Time / Age & Birthdays
Birthday Calculator
Count down to the next birthday, see how old someone will be, and check days since the last birthday with a quick online birthday calculator.
Dates & Time / Business Calendars
Business Days Calculator
Count weekdays and business days between dates, with inclusive counting and optional holiday adjustment.
Dates & Time / Date Calculations
Date Add Subtract Calculator
Add or subtract years, months, weeks, and days from any date, then see the resulting calendar date, weekday, and shifted duration.
Dates & Time / Date Calculations
Date Difference Calculator
Measure the time between two dates in years, months, weeks, days, and business days.
Dates & Time / Date Calculations
Days Until Calculator
Count days until a future date or days since a past date, then see the calendar breakdown, weeks, and business days.