Time Duration Calculator
Find the exact elapsed time between two clock times in hours, minutes, seconds, decimal hours, and total minutes.
Calculate durationCalculate work hours, shifts, time cards, lunch breaks, overtime, PTO accrual, biweekly pay, salary conversions, decimal time, and date math without signup.
Each tool solves a distinct job instead of sending you through a maze of nearly identical pages.
Find the exact elapsed time between two clock times in hours, minutes, seconds, decimal hours, and total minutes.
Calculate durationRepeat a daily shift across the week, subtract breaks, apply rounding, and estimate overtime and gross pay.
Open calculatorWeekly or biweekly clock-in/out cards with breaks, overtime, browser autosave, printing, and CSV export.
Build time cardConvert hours, minutes, and seconds into payroll-friendly decimal hours, or reverse the conversion.
Convert timeEstimate regular, overtime, optional double-time, and gross pay with editable thresholds and multipliers.
Estimate overtimeCount, add, or subtract workdays with custom non-working weekdays and excluded closure dates.
Calculate workdaysFind the exact number of days between two dates with inclusive counting, weeks, and calendar years/months/days.
Compare datesAdd or subtract days, weeks, months, or years from a date and get the exact target date and weekday.
Calculate a dateConvert annual salary to hourly pay or hourly rate to annual income with monthly, biweekly, weekly, and daily equivalents.
Convert payEstimate PTO earned, current balance, projected balance, days available, optional cap, and gross balance value.
Estimate PTOFind lunch return time, paid hours after an unpaid break, or clock-out time after paid hours plus lunch.
Calculate lunchConvert annual salary to gross biweekly pay or total two weeks of hourly pay with optional overtime.
Calculate biweekly payThe core math runs locally and the interface stays focused on the calculation.
Work Hours Hub is a connected family of time, work, payroll-time, and deadline utilities. We build separate pages when the task itself is different, not merely because another keyword exists.
The site avoids unnecessary runtime dependencies, keeps the calculator interface immediately available, and uses browser-side calculations for the core tools so common interactions do not wait on a server round trip.
A payroll question, a clock-time question, and a deadline question may all involve numbers, but they need different inputs. These paths keep the handoff between tools obvious.
Use the Time Card Calculator for changing daily clock-in/out entries, convert payroll time with Hours to Decimal, then estimate premium pay with the Overtime Pay Calculator.
Use the Salary to Hourly Calculator with the hours and paid weeks that match the schedule. Use Work Hours first when you need to establish the weekly-hours assumption.
Measure elapsed calendar time with Days Between Dates, move forward or backward with the Date Calculator, or use Business Days when non-working days should be skipped.
Start with the Work Hours & Shift Calculator, then use the Lunch Break Calculator when the question is return time or a single-shift lunch deduction.
Use Biweekly Pay for a two-week gross estimate, Overtime Pay for premium hours, and Salary to Hourly for annual/hourly comparisons.
Use the PTO Accrual Calculator to estimate earned leave from a pay-period allowance or hours-worked accrual rate.
Work Hours Hub is built as a utility site first. The calculators expose the settings that materially change the answer, document the math behind the result, and avoid pretending that one payroll rule or holiday calendar applies to everyone.
See the formulas for overnight time, break subtraction, rounding, decimal hours, overtime, double-time, and business-day counting.
Each calculator goes through repeatable checks for its formulas and important edge cases before updates are published.
Learn what the site covers, what stays in your browser, how diagnostics are minimized, and where the tools intentionally stop making assumptions.