All Date & Time calculators12 calculators

Dates, durations & countdowns

• Age CalculatorCalculate your exact age in years, months and days from your birth date — plus total days, weeks and hours lived.
• Days Between Dates CalculatorCount the exact number of days, weeks, weekdays and months between two dates — inclusive or exclusive.
• Time Duration CalculatorAdd or subtract hours, minutes and seconds — perfect for timesheets, logging work hours and event timing.
• Working Days CalculatorCount working days (weekdays minus holidays) between two dates for payroll or project planning.
• Meeting Time Zone PlannerConvert one meeting time across common UTC offsets to find a slot that works for everyone.
• Work Hours CalculatorHours worked between a start and end time, with an unpaid break deduction.
• Countdown CalculatorCount the days, hours, and weeks remaining until any date — birthdays, deadlines, holidays, or launches.
• Date Add CalculatorAdd or subtract days from any date to find deadlines, due dates, warranty ends, or return windows.
• Week Number CalculatorFind the ISO 8601 week number, ISO year, and quarter for any date — the standard used in Europe.
• Unix Timestamp ConverterConvert a Unix timestamp to a readable UTC date and time — or find the timestamp for any date. Milliseconds supported.
• Meeting Cost CalculatorCompute what a meeting really costs from attendees' salaries and duration, and see the yearly bill for recurring meetings.
• Time Card CalculatorTurn clock-in and clock-out times into daily hours worked, overtime after your threshold, weekly totals, and gross pay at two rates.