Calculator library
Free Work Calculators
Choose the calculation you need: a timecard, pay estimate, shift calendar, PTO balance or staffing plan. Enter your figures, check the assumptions and use the worked example to verify the result.
Browse calculators
Hours & timesheets
Explore hours & timesheets guides →
Work hours calculator
Enter 7 or 14 days of clock times and unpaid breaks. Check overtime by workweek and export a biweekly CSV.
Open calculator →Calculator · Hours & timesheetsDecimal hours calculator
Convert hours:minutes to decimals, check a batch total and export the conversion table.
Open calculator →Calculator · Hours & timesheetsTimesheet rounding checker
Compare rounded rows with a total rounded once, using up to 500 durations.
Open calculator →Calculator · Hours & timesheetsClock-out calculator
Find when to leave from your start time, paid-hour target and unpaid breaks.
Open calculator →Calculator · Hours & timesheetsHours between dates calculator
Measure a multi-day interval, deduct excluded minutes and specify UTC offsets when needed.
Open calculator →Calculator · Hours & timesheetsHours to workdays calculator
Convert an hour total into equivalent days using your own day length.
Open calculator →Pay & payroll
Explore pay & payroll guides →
Overtime pay calculator
Separate regular earnings, overtime earnings and the extra premium at your entered rate.
Open calculator →Calculator · Pay & payrollShift differential calculator
Estimate flat or percentage premiums on eligible hours and inspect the gross-pay breakdown.
Open calculator →Calculator · Pay & payrollSalary to hourly calculator
Compare annual salary with an hourly equivalent using your own hours and paid weeks.
Open calculator →Calculator · Pay & payrollPay date calendar
Generate weekly, biweekly, semimonthly or monthly pay dates from a confirmed anchor.
Open calculator →Calculator · Pay & payrollThree-paycheck months calculator
Find months containing three dates in your biweekly payday cycle.
Open calculator →Calculator · Pay & payrollBiweekly vs. semimonthly pay calculator
Compare gross paycheck amounts when an annual salary is divided into 26 or 24 payments.
Open calculator →Shift schedules
Explore shift schedules guides →
Rotating shift calendar
Turn a repeating work/rest pattern into a dated calendar and download an all-day calendar file.
Open calculator →Calculator · Shift schedulesShift schedule maker
Build an employee roster, review hours and export the weekly schedule as CSV.
Open calculator →Calculator · Shift schedulesShift coverage calculator
Compare employee work segments with a staffing target to locate uncovered intervals.
Open calculator →PTO & leave
PTO accrual calculator
Estimate earned leave using hours worked or pay periods and project an available balance.
Open calculator →Calculator · PTO & leavePTO accrual rate calculator
Recover an observed rate from earned leave and eligible hours, then estimate future accrual.
Open calculator →Calculator · PTO & leavePTO balance ledger
Apply dated accrual and leave transactions in order, including hours blocked by a balance cap.
Open calculator →Calculator · PTO & leavePTO goal date calculator
Estimate when an accrual plan reaches the balance needed for a planned absence.
Open calculator →Staffing & FTE
Explore staffing & fte guides →
Monthly work hours calculator
Count actual scheduled dates, subtract your closures and export a month or year breakdown.
Open calculator →Calculator · Staffing & FTEBusiness days calculator
Count a date range using custom working weekdays and closures.
Open calculator →Calculator · Staffing & FTEFTE calculator
Translate workload into productive and scheduled full-time equivalents using a stated baseline.
Open calculator →Calculator · Staffing & FTEFTE schedule change calculator
Compare before-and-after team schedules and the change in hours and FTE.
Open calculator →Calculator · Staffing & FTEStaffing shrinkage calculator
Estimate scheduled hours and FTE needed after leave, training and other unavailable time.
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Choose the right starting point
Use work hours for actual clock records, decimal hours for an existing duration column, and monthly or annual work hours for planned calendar capacity. These are different inputs, even when all three results are expressed in hours.
For explanations and spreadsheet formulas, browse the work hours, shift and payroll guides. Pay and leave calculations model the assumptions you enter; they do not establish entitlement or replace your employer’s rules.