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Time tools that get you to the answer faster.

Calculate work hours, shifts, time cards, lunch breaks, overtime, PTO accrual, biweekly pay, salary conversions, decimal time, and date math without signup.

Calculate time duration Calculate work hours

PPrivate calculations0No account required↯Instant resultsMMobile friendly

Core utilities

Choose what you need to calculate

Each tool solves a distinct job instead of sending you through a maze of nearly identical pages.

Time Duration Calculator

Find the exact elapsed time between two clock times in hours, minutes, seconds, decimal hours, and total minutes.

Calculate duration

Work Hours Calculator

Repeat a daily shift across the week, subtract breaks, apply rounding, and estimate overtime and gross pay.

Open calculator

Time Card & Timesheet Calculator

Weekly or biweekly clock-in/out cards with breaks, overtime, browser autosave, printing, and CSV export.

Build time card

Hours to Decimal Calculator

Convert hours, minutes, and seconds into payroll-friendly decimal hours, or reverse the conversion.

Convert time

Overtime Pay Calculator

Estimate regular, overtime, optional double-time, and gross pay with editable thresholds and multipliers.

Estimate overtime

Business Days Calculator

Count, add, or subtract workdays with custom non-working weekdays and excluded closure dates.

Calculate workdays

Days Between Dates Calculator

Find the exact number of days between two dates with inclusive counting, weeks, and calendar years/months/days.

Compare dates

Date Calculator

Add or subtract days, weeks, months, or years from a date and get the exact target date and weekday.

Calculate a date

Salary to Hourly Calculator

Convert annual salary to hourly pay or hourly rate to annual income with monthly, biweekly, weekly, and daily equivalents.

Convert pay

PTO

PTO Accrual Calculator

Estimate PTO earned, current balance, projected balance, days available, optional cap, and gross balance value.

Estimate PTO

Lunch Break Calculator

Find lunch return time, paid hours after an unpaid break, or clock-out time after paid hours plus lunch.

Calculate lunch

Biweekly Pay Calculator

Convert annual salary to gross biweekly pay or total two weeks of hourly pay with optional overtime.

Calculate biweekly pay

Practical guides

Understand the decision behind the number.

A calculator can apply inputs consistently. These guides help you choose those inputs, document assumptions, and reconcile an estimate with an official record.

Calculating work hoursPunches, breaks, overnight shifts, and rounding Overtime pay basicsWorkweeks, rates, thresholds, and limitations Biweekly vs. semimonthly26 versus 24 pay periods PTO accrual methodsAllowances, rates, caps, and reconciliation Business-day deadlinesEndpoints, closures, cutoffs, and calendars

Browse all practical guides →

Useful first. Everything else second.

The core math runs locally and the interface stays focused on the calculation.

Browser-localCore calculations

ResponsiveDesktop to phone

ConnectedOne focused tool family

Built around real tasks

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.

Fast by design

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.

Connected workflows

Start with the calculator that matches the job.

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.

From punches to pay

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.

From salary to an hourly comparison

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.

From one date to a deadline

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.

Work, pay & leave workflows

Follow the numbers from a shift to a paycheck or PTO balance.

Shift + lunch

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.

Pay period

Use Biweekly Pay for a two-week gross estimate, Overtime Pay for premium hours, and Salary to Hourly for annual/hourly comparisons.

Paid time off

Use the PTO Accrual Calculator to estimate earned leave from a pay-period allowance or hours-worked accrual rate.

How the site earns trust

Clear inputs, visible assumptions, and real limitations.

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.

Accuracy & testing

See the assumptions, limitations, and accuracy standards used across time, pay, leave, and business-day tools.

Read accuracy & testing standards

Tested for accuracy

Each calculator goes through repeatable accuracy checks and important edge-case validation before updates are published.

See how accuracy is checked

About Work Hours Hub

Learn what the site covers, what stays in your browser, how diagnostics are minimized, and where the tools intentionally stop making assumptions.

About the site