Weeks Calculator — Count weeks and plan your schedule.
Calculate weeks between dates, check ISO week numbers, and turn any week into a practical private planner for deadlines, meetings and priorities.
Choose a week. Build the plan.
Pick a date or click the ISO calendar. The selected week opens directly in a planner for priorities, deadlines, meetings and hourly work blocks.
Turn the selected week into a plan
Use the date field or the calendar. We open the matching Monday-to-Sunday ISO week in the planner.
Count weeks between two dates
The core calculator stays at the center of WeeksCalculatorPro. Get full weeks, total days and remaining days without leaving the homepage.
Plan from quarter to week
Start with the bigger goal, find the deadline, map the timeline and turn it into an actionable week.
Plan the quarter
See ISO weeks, goals and reporting windows in one broader planning view.
Open quarter board → 2Set a deadline
Add days, weeks or business days to find a practical due date.
Calculate deadline → 3Build a timeline
Work backwards from the deadline and map project time into weeks.
Build timeline → 4Plan the week
Turn the timeline into priorities, meetings, deadlines and hourly work blocks.
Open weekly planner →Fast answers when the plan depends on dates
Deadline Calculator
Add days, weeks or business days to find a practical due date.
Calculate deadlineDate to Week Number
Find the ISO week number and exact Monday-to-Sunday range.
ConvertBusiness Days
Count Monday-to-Friday workdays between two dates.
Count workdaysPayroll Period
Estimate weekly and biweekly payroll period ranges from a date.
Open payroll toolLearn the method behind the tools
Fewer, deeper guides connect ISO week rules with practical weekly and project planning.
Weekly Planning Guide
Turn goals, deadlines and recurring responsibilities into a practical week.
Read guide →Project Timeline Planning
Plan project milestones backwards from a deadline and map the work into weeks.
Read guide →ISO Week Numbers Explained
Understand ISO week numbers, week-year rules and Monday-to-Sunday date ranges.
Read guide →