For HR and people teams
HR calculators for payroll, shifts, employment dates, and workforce planning
Use Calcadian to handle common HR date and time calculations without spreadsheets for every small question. Pick the task below, enter the dates or times, and get a clear result.
Which Calcadian calculators are most useful for HR?
The most useful HR tools are the Weekly Time Card, Shift, Decimal Hours, Business Days, Business Date, Date Difference, Months Between Dates, Time Since, Add or Subtract Days, and Time Zone Converter. Together they cover payroll hours, workdays, tenure, probation dates, deadlines, and distributed-team scheduling.
Start with the HR task
If you already know what you need to calculate, this table points to the shortest route.
| HR task | Use |
|---|---|
| Weekly payroll hours | |
| Single-shift hours | |
| Probation or contract end date | |
| Employee tenure | |
| Working days in a period | |
| International interview or meeting |
Payroll and timekeeping
Calculate weekly hours, individual shifts, breaks, decimal hours, and elapsed work time.
Weekly Time Card Calculator
Add up a full week of shifts with breaks and overtime.
Shift Calculator
Work out the hours in one shift, breaks included.
Decimal Hours Calculator
Convert between hours and minutes and decimal hours.
Time Duration Calculator
Calculate hours and minutes between two times.
Hours and Minutes Calculator
Add or subtract durations without base-60 arithmetic.
Date & Time Difference Calculator
Measure elapsed time between two full date and time values.
Employment periods and service
Measure tenure, probation periods, fixed-term contracts, training periods, and service length.
Date Difference Calculator
Count days, weeks, months, and years between two dates.
Months Between Dates Calculator
Count whole calendar months and the days left over.
Weeks Between Dates Calculator
Calculate total weeks, remaining days, and decimal weeks between two dates.
Time Since Calculator
See how long ago a past date was, in years, months, and days.
Add or Subtract Days Calculator
Find a future or past date by adding or subtracting time.
Working days and HR deadlines
Count workdays and plan onboarding, notice, payroll, leave, and administrative dates.
Business Days Calculator
Count working days between two dates, excluding weekends.
Business Date Calculator
Add or subtract business days to find the resulting workday.
Days Until Calculator
Count how many days are left until any future date.
Week Number Calculator
Find the ISO week number for any date.
Day of the Week Calculator
Find what day of the week any date falls on.
Distributed teams
Coordinate interviews, meetings, handovers, and work across time zones.
Employee records
Calculate exact age as of today or another reference date when age is legitimately required.
Use the result as a calculation, not a compliance decision
Calcadian does the date and time arithmetic you ask it to do. It does not determine which statutory holiday calendar, overtime threshold, leave rule, notice period, retirement age, or employment-law requirement applies. For regulated or contractual decisions, verify the inputs and result against the applicable jurisdiction, employment contract, company policy, payroll system, or qualified professional.