TOOLS
Calendar Calculators
Useful date and time calculation tools for planning, scheduling, and project management. All calculators work with your local timezone.
Date Difference
Calculate the exact number of days, weeks, months, and years between two dates.
- Days & weeks
- Months & years
- Working days
Open Calculator
Add/Subtract Days
Find a future or past date by adding or subtracting days from a starting date.
- Add days
- Subtract days
- Include/exclude weekends
Open Calculator
Week Number
Find the ISO week number for any date and see all dates within that week.
- ISO week number
- Week dates range
- Year calendar view
Open Calculator
Quick Calculations
Common date calculations you can do right here
360
days
Days until New Year
2
ISO week
Current Week
365
total
Days in Year
6
current
Day of Year