Date Calculators
All the essential tools for everyday date calculations.
Our General Date Calculators
Julian Day Converter
Free online Julian Day converter to convert calendar dates to Julian Day numbers and vice versa.
Go to ToolBusiness Days Calculator
Free business days calculator to calculate working days between two dates excluding weekends and holidays.
Go to ToolWeek Number Calculator
Free week number calculator to find the week number of any date in a year according to ISO standards.
Go to ToolWeekday Calculator
Free weekday calculator to find the day of the week for any date or calculate weekdays between two dates.
Go to ToolLeap Year Calculator
Free leap year calculator to check whether a year is a leap year and find upcoming leap years.
Go to ToolDating Age Calculator
Free dating age calculator to check acceptable dating age range using the half your age plus seven rule.
Go to ToolDeadline Calculator
Free deadline calculator to calculate a final due date by adding or subtracting days, weeks, or months from a start date.
Go to ToolExpiry Date Calculator
Free expiry date calculator to quickly calculate expiry dates for food, medicine, and cosmetics using shelf life and manufacturing date.
Go to ToolAnniversary Calculator
Calculate your anniversary date, count days since your special date, or find future anniversaries easily with our free tool.
Go to ToolGolden Birthday Calculator
Use our Golden Birthday Calculator at Online Calculator Hub to find the special year when your age matches your birth date.
Go to ToolBC to AD Calculator
Use our BC to AD Calculator at Online Calculator Hub to easily convert historical years from BC (Before Christ) to AD (Anno Domini).
Go to ToolWeek Calculator
Use our Week Calculator at Online Calculator Hub to calculate the number of weeks between two dates or add and subtract weeks from a given date.
Go to Tool