All Calculators
Professional date calculation tools for every use case
Days Between Dates
Calculate the exact number of days between two dates, including business days and weekends
Date Calculator
Add or subtract days, weeks, months, or years from any date with smart month-end handling
Business Days Calculator
Calculate working days excluding weekends and US federal holidays for accurate project planning
Time Duration Calculator
Calculate precise duration between date/times with hour and minute precision for billable hours
Days Until/Since Calculator
Count days to future events or track time elapsed since past dates with visual countdown
Recurring Dates Calculator
Generate series of recurring dates based on custom patterns (weekly meetings, monthly billing, yearly anniversaries)
Date Range Picker
Select date ranges and perform bulk calculations. Filter by weekdays, holidays, add days/weeks/months to entire ranges.
Calendar Visualization
Visualize calculated dates, date ranges, and important dates on an interactive calendar for project planning
Looking for more calculation power? Pair these calculators with GoalFlow for daily goal execution and planning, and explore RoutineKit when you need complementary planning tools.