Date & time calculators

Count ages, days and hours precisely. Leap years, month lengths and overnight shifts are handled for you.

All tools in this category

• Time Card CalculatorAdd shift start and end times, subtract unpaid breaks and total your time card. See hours, minutes, optional basic gross pay and download a CSV.
• Age CalculatorCalculate your exact age in years, months and days from your date of birth, plus total weeks and days and the countdown to your next birthday.
• Days Between DatesCount the days between two dates, in days, weeks, and years, months and days. Choose whether to include the end date; free and instant in your browser.
• Hijri Date ConverterConvert dates between the Hijri (Islamic) and Gregorian calendars in both directions, and see today's Hijri date. Umm al-Qura calendar, free.
• Hours CalculatorCalculate the hours and minutes between two times, subtract a break, and get decimal hours for timesheets. Works for night shifts past midnight too.
• Working Days CalculatorCount working days between two dates, or find the date a number of business days away. Choose a Saturday–Sunday or Friday–Saturday weekend and add holidays.
• Time Zone ConverterConvert a date and time between time zones and countries, with daylight saving applied automatically. See the time difference, e.g. New York to India.