Free calculators
Date & Working Days Tools
Practical calculators for HR teams, payroll managers, project planners, and anyone who needs accurate date math. Eight tools covering working days, deadlines, countdowns, week numbers, and more.
Business & Working Days
Working Day Tools
Net working days between any two dates — excludes weekends and public holidays. 192 countries, correct weekend rules (Fri/Sat for the Middle East). Shareable result URLs.
- HR & payroll deadline tracking
- Project milestone planning
- Notice-period calculations
- Invoice due-date audits
Enter a start date and a working-day count; get the exact deadline date with country holidays excluded. Lists every public holiday skipped.
- Legal notice deadlines
- Payment terms (net 30 days)
- Regulatory filing windows
- HR notice period end dates
Add or subtract calendar days or working days from a start date. Working days mode excludes weekends and country public holidays for 192 countries.
- Find a date N days from now
- Working day offset from contract date
- Notice period end date
- Delivery lead time calculation
Date Calculators
Date Calculators
Exact gap between any two dates: total days, complete weeks, calendar months, and a full years-months-days breakdown. Works for any date range.
- Age calculations
- Contract duration
- Days until an event
- Days since a milestone
Find how many days until any future date — or how many days since a past date. Shows a weeks-and-days breakdown, the target weekday, and accepts an optional label for sharing.
- Countdown to a holiday or birthday
- Days until a project deadline
- Days since a launch or milestone
- Shareable named countdown links
Find the next or previous Monday, Tuesday… from any date. Shows the result date and how many days away it is. Instant and shareable.
- Next Friday for a weekly report
- Previous Monday for a timesheet
- Next occurrence of a recurring meeting day
- Day-of-week deadline from any date
Calendar Reference
Calendar Utilities
Find the ISO 8601 week number for any date — plus the week start date (Monday), week end date (Sunday), and the ISO week-year. Shareable result URLs.
- Project sprints and weekly reporting
- Payroll periods by week number
- Confirming ISO week-year for late December
- Planning tools that use week-based scheduling
Find which day of the year any date falls on. Shows the day number, total days in the year, days remaining, and whether the year is a leap year.
- Meteorology and climate-science day numbers
- Data pipelines using Julian date formats
- Year-progress tracking
- Confirming leap years for scheduling logic